Article
Energy & Fuels
Vishal Anand, Mrinal Kashyap, Atreyee Ghosh, Kanchan Samadhiya, Bala Kiran
Summary: This study identified a better combination of nutrients/salinity stresses that enhances lipid accumulation in Scenedesmus sp. The multi-stress approach improved lipid production and biomass yield, suggesting its potential for large-scale production of algal biofuels.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Environmental Sciences
Mrinal Kashyap, Kanchan Samadhiya, Atreyee Ghosh, Vishal Anand, Hyunju Lee, Naomi Sawamoto, Atsushi Ogura, Yoshio Ohshita, Parasharam M. Shirage, Kiran Bala
Summary: The research focuses on the intracellular biosynthesis of Ag/AgCl nanohybrids in microalgae, Scenedesmus sp., and its effects on cell growth and lipid profile. The study found that the total lipid content of cells remained static during the biosynthesis of Ag/AgCl nanoparticles, and the FAME profile improved. Tests showed that the synthesized nanoparticles exhibited antibacterial efficiency.
ENVIRONMENTAL RESEARCH
(2021)
Article
Engineering, Environmental
Chaofan Zhang, Shih-Hsin Ho, Anran Li, Liang Fu, Dandan Zhou
Summary: The study suggests that a microalgal co-culture strategy can resist competition stress from bacteria and improve lipid production. The growth inhibition in the co-culture system was significantly reduced, and lipid production was 20-79% higher than that in monocultures.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Ashutosh Pandey, Sameer Srivastava, Sanjay Kumar
Summary: This study used an airlift reactor to investigate the carbon dioxide fixation rate and lipid yield of Scenedesmus sp. ASK22, a unicellular green microalgae, using dairy effluent as a biofuel feedstock. The study revealed the impact of independent process parameters such as light intensity, CO2 concentration, and aeration rate on the carbon dioxide fixation rate and lipid yield. The optimal conditions were found to be a light intensity of -6.24 Klux, CO2 concentration of -14.03% (v v-1), and aeration rate of -1.02 liter per minute (LPM). Under these conditions, the lipid yield and carbon dioxide fixation rate were significantly higher than in the control experiment. The results suggest that Scenedesmus sp. ASK22 is a potential candidate for CO2 sequestration, biofuel production, and waste remediation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Energy & Fuels
S. M. Zakir Hossain, N. Sultana, M. M. Hossain, S. A. Razzak
Summary: This study investigated the effects of light-dark cycles and NaNO3 dose on Chlorella kessleri microalgal-specific growth rate, biomass productivity, and intracellular lipid productivity. The results of single-objective and multi-response optimization showed the maximum achievable values and the optimal culture conditions for the production of lipid from microalgae. The use of central composite design with desirability function was proven to be useful in designing and operating photobioreactors.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Nur Atikah Aryanee Nadzri, Nazlina Haiza Mohd Yasin, Mimi Hani Abu Bakar, Suresh Thanakodi, Mohd Nur Ikhmal Salehmin, Mohd Sobri Takriff, Mohamad Faisal Ni Aznan, Toshinari Maeda
Summary: This study utilized microalgae species Chlamydomonas sp. (UKM6) and Scenedesmus sp. (UKM9) as the terminal electron acceptor in the cathode chamber of photosynthetic microbial desalination cells (PhMDC). The PhMDC-UKM9 and UKM6 achieved power densities of 1942 mW/m3 and 1714 mW/m3, with desalination rates of 44% and 32% respectively. The local microalgae species demonstrated integrated power production, wastewater treatment, and water purification comparable to commercial microalgae.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Multidisciplinary Sciences
Noura El-Ahmady El-Naggar, Ragaa A. Hamouda, Ghada W. Abou-El-Souod
Summary: Microalgae have diverse applications, with the most important one being the biological treatment of wastewater. This study investigated the factors that have the most significant impact on the simultaneous decolorization of methyl red and lipid production by the microalgae Scenedesmus obliquus. The results showed that microalgae can effectively remove dyes and produce renewable fuels such as biodiesel.
SCIENTIFIC REPORTS
(2022)
Article
Green & Sustainable Science & Technology
Ramachandran Sivaramakrishnan, Subramaniyam Suresh, Aran Incharoensakdi
Summary: This study utilized Scenedesmus sp. to produce methyl ester and itaconic acid through direct transesterification and hydrolysis with optimized conditions. The yield of methyl ester reached 93% under optimized parameters, and the obtained methyl ester showed satisfactory fuel properties. The hydrolysate from the spent biomass was used for itaconic acid production with improved yields by altering the MgSO4 concentration and adding TCA cycle metabolites.
Article
Environmental Sciences
Junren Chen, Zian Ren, Zheng Li, Bo Wang, Yuejun Qi, Wenbao Yan, Qingqing Liu, Hengyu Song, Qingxiang Han, Lijie Zhang
Summary: Improving understanding of the interaction between algae and bacteria can enhance wastewater treatment. In this study, untreated marine biopharmaceutical wastewater containing native bacteria was used to culture microalgae, and the effect of native bacteria on microalgae growth was investigated. The results showed that native bacteria greatly promoted microalgae growth, leading to high biomass and lipid accumulation. This study provides a theoretical foundation for improving biopharmaceutical wastewater treatment.
Article
Engineering, Environmental
Feng Gao, Xuan-Long Zhang, Chang-Jian Zhu, Ke-Hao Huang, Qiang Liu
Summary: This study investigated the effect of seawater addition on the precipitation performance and biofuel production of freshwater microalgae. The results showed that the addition of seawater improved the sedimentation performance and lipid content of the microalgae. The highest algal lipid productivity was achieved in wastewater containing 60% seawater. Seawater addition increased cell diameter, reduced zeta potential, and promoted the synthesis of extracellular polymeric substances, improving the precipitation performance of the microalgae cells. Glutathione peroxidase played a role in removing reactive oxygen species produced by seawater stress. This research provides valuable insights for optimizing microalgae biofuel production.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agricultural Engineering
Reetu, Aniruddha Jaiswal, Rajiv Prakash, Mike Clifford, Sarvajeet Singh Gill, Monika Prakash Rai
Summary: The use of photo-responsive nanomaterials as a substrate for microalgae can overcome the limitations of low biomass yield and lipid production, enhancing the economic viability of microalgae-derived biodiesel. This study investigated the potential of graphene oxide; graphitic carbon nitride (GO@CN) as a photocatalytic material for Chlorosarcinopsis sp. MAS04. Through characterization techniques and cytotoxicity assay, the optimal supplement of 50 mg L-1 GO@CN was found to significantly increase biomass and lipid production by 1.5-fold and 1.9-fold respectively, compared to the control. A cost-benefit analysis indicated a 350% increase in FAME yield at a slightly higher cost. This study suggests that the combination of nano-algal science could be a promising approach for sustainable microalgae-based biodiesel.
BIOMASS & BIOENERGY
(2023)
Review
Thermodynamics
Soumaya Grira, Hadil Abu Khalifeh, Mohammad Alkhedher, Mohamad Ramadan
Summary: Microalgal biofuel has the potential to replace nonrenewable fuel sources and address energy, economic, and environmental challenges. However, the low economic viability of its production process calls for interdisciplinary research to commercialize this green fuel alternative. This paper evaluates the current status of microalgal biofuel production processes, compares various cultivation modes, harvesting methods, lipid extraction methods, and conversion methods, and highlights the non-destructive lipid extraction method (milking) as superior to the conventional process. It also recommends integrating the biorefinery concept, implementing genetic engineering, and utilizing artificial intelligence and process automation for efficient technology development.
Article
Green & Sustainable Science & Technology
Atreyee Ghosh, Rimjhim Sangtani, Vishal Anand, Mrinal Kashyap, Bala Kiran
Summary: Microalgae based biofuel production is influenced by the synergistic interactions between critical nutrients and light energy availability. This study investigated the impact of light intensity, photoperiod, and nutrient conditions on energy storage metabolites and fuel characteristics of Scenedesmus sp. The results indicate that optimizing nutrient proportions under specific light conditions can enhance biomass production and fuel quality.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Chemical
Muluwork Maru, Feleke Zewge, Demeke Kifle, Endalkachew Sahle-Demessie
Summary: This study used native Scenedesmus sp. isolated from a brackish Rift Valley lake for simultaneous brackish water desalination and lipid production. The highest lipid content of 26% was observed in the culture treated with 10 g/L NaCl, which is 27% higher than the control. The sample treated with 5 g/L NaCl appears to be suitable for the integrated desalination and lipid production system, achieving a desalination efficiency of 17% with lipid production of 109 mg/L.
DESALINATION AND WATER TREATMENT
(2022)
Article
Multidisciplinary Sciences
Mohammed Omar Faruque, Mohammad Mozahar Hossain, Shaikh Abdur Razzak
Summary: Microalgae Scenedesmus dimorphus was cultivated in synthetic wastewater media to investigate its bioenergy potential. Batch experiments with different CO2 concentrations were performed for biomass generation. The highest biomass production was achieved under different CO2 feed concentrations. Cultivation of microalgae with CO2 supplementation significantly impacted lipid buildup in the biomass. Physicochemical characterization revealed that the biomass had a high heating value and low sulfur content, making it a potential fuel feedstock for environmentally friendly bioenergy production.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Kamaraj Veeramuthu, Pushparaj Annadurai, Daniel A. Gideon, Ramachandran Sivaramakrishnan, Balamurugan Sundarrajan, Kandavel Dhandayuthapani, Arivalagan Pugazhendhi
Summary: The methanolic leaf extract of Ixora brachiata Roxb. showed significant free radical scavenging activity and antibacterial activity against Escherichia coli and Staphylococcus aureus. The extract was rich in antioxidants and anthraquinones. Additionally, it exhibited cytotoxic potential against MCF-7 breast cancer cell lines and showed binding to important receptor proteins involved in breast cancer pathophysiology.
PROCESS BIOCHEMISTRY
(2023)
Article
Biotechnology & Applied Microbiology
Kathirvel Brindhadevi, Hakim A. L. Garalleh, Amr Alalawi, Ebtisam Al-Sarayreh, Arivalagan Pugazhendhi
Summary: Inorganic and organic nanoparticles have diverse applications due to their unique characteristics. Carbon nanomaterials (CNM) are particularly attracting attention in biomedical applications because of their physical and chemical diversity. Selecting suitable CNM for controlled and targeted drug delivery in cancer treatment is important. This review focuses on the synthesis, drug loading, surface coating, and application of CNM as a drug delivery agent for cancer diagnosis and treatment.
BIOCHEMICAL ENGINEERING JOURNAL
(2023)
Review
Energy & Fuels
Xuan Wang, Yaoli Zhang, Changlei Xia, Ali Alqahtani, Ashutosh Sharma, Arivalagan Pugazhendhi
Summary: Algae biorefinery ideas have recently gained significant attention in the emerging algae mediated bioeconomy, focusing on improving biomass, biofuel, and bioproducts productivity. By understanding the metabolic processes of algae and their potential in generating biofuels and bioproducts, researchers can uncover key obstacles to carbon utilization and photosynthesis potential, leading to increased production efficiency and economic potential. This analysis presents possible mechanisms for a theoretical algae biorefinery structure, addressing specific challenges for each product and exploring market potential for commercialization.
Article
Energy & Fuels
Prabakaran Ganeshan, V. S. Vigneswaran, Sarath C. Gowd, Dhamodharan Kondusamy, C. Sanjay Kumar, Nageshwari Krishnamoorthy, Deepak Kumar, Ankita Juneja, Balasubramanian Paramasivan, Nithin N. Raju, Karthik Rajendran, Arivalagan Pugazhendhi
Summary: Hydrogen is considered as the fuel of the future due to its high energy density and zero-carbon emission potential. Techno-economic analysis (TEA) and life cycle analysis (LCA) of various bio-hydrogen generation processes can help identify cost-effective and low-carbon methods, attracting investors and overcoming barriers to hydrogen integration in the energy market. Gasification was found to be the most economical method for bio-hydrogen production, followed by anaerobic digestion. The gasification of eucalyptus wood was found to have the least carbon footprint.
Article
Energy & Fuels
Yue Zhang, A. N. Anoopkumar, Embalil Mathachan Aneesh, Arivalagan Pugazhendhi, Parameswaran Binod, Mohammed Kuddus, Ashok Pandey, Mukesh Kumar Awasthi, Raveendran Sindhu
Summary: The scientific community relies on the recovery of special elements for renewable energy-powered wastewater desalination, using various desalination approaches. Recent developments allow for the integration of green energy and solar energy-efficient strategies to create renewable energy-powered desalination methods. Green-based technologies are preferred over conventional methods due to their reliability in energy consumption, production cost, and efficiency.
Article
Chemistry, Multidisciplinary
D. Vinoth Pandi, V. Saraswathi, M. R. Venkatraman, N. Muthukumarasamy, S. Agilan, D. Velauthapillai, K. Brindhadevi, A. Pugazhendhi
Summary: PbS quantum dots and PbS quantum dots-sensitized ZnO nanostructures with rod-like shape were successfully synthesized. The prepared PbS quantum dots exhibited significant visible light absorption, and the light absorption of PbS quantum dots-sensitized ZnO nanorods was higher than that of bare ZnO nanorods. The uniform development of rod-like ZnO nanostructures with deposition of PbS quantum dots on the surface was observed from electron microscope images. The solar cells made using PbS quantum dots-sensitized ZnO nanorods achieved a power conversion efficiency of 1.2%.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Environmental Sciences
Rajasree Shanmuganathan, Mohammad Sibtain Kadri, Thangavel Mathimani, Quynh Hoang Le, Arivalagan Pugazhendhi
Summary: The presence of emerging pollutants in freshwater environments poses a severe threat to the environment and human beings. These pollutants mainly come from urbanization and increased industrial growth, and their concentration, even at low levels, can be ecologically lethal to aquatic life. Research on the biodegradation of these pollutants has been a significant area of study worldwide, as their impact on aquatic life and freshwater consumption is subtle but significant. This review aims to understand the recent discoveries and available treatment technologies of emerging pollutants, and propose an innovative and cost-effective method for their sustainable treatment.
Review
Energy & Fuels
Sabarathinam Shanmugam, Anjana Hari, Arivalagan Pugazhendhi, Timo Kikas
Summary: Sustainable biofuel production is necessary for fueling growing economies with reduced carbon footprint. Although lignocellulosic biomass conversion into energy-dense biofuels is hindered by its high oxygen content, microbial biofuel production from biomass still has potential.
Review
Environmental Sciences
Saqib Hassan, Aswin Thacharodi, Anshu Priya, R. Meenatchi, Thanushree A. Hegde, R. Thangamani, Ht Nguyen, Arivalagan Pugazhendhi
Summary: An Endocrine Disrupting Chemical (EDC) is a compound that disrupts the function of the endocrine system and is found in the environment. EDCs, such as Bisphenol A and pesticides, have been shown to have negative effects on the female reproductive system. Understanding the relationship between EDCs and women's health is crucial for developing strategies to protect reproductive health and informing public policy decisions.
ENVIRONMENTAL RESEARCH
(2024)
Review
Environmental Sciences
Vignesh Vinayagam, Kavitha Nagarasampatti Palani, Sudha Ganesh, Siddharth Rajesh, Vedha Varshini Akula, Ramapriyan Avoodaiappan, Omkar Singh Kushwaha, Arivalagan Pugazhendhi
Summary: The presence of pollutants in water contributes to global pollution and poses significant threats to humans and wildlife. Finding effective wastewater treatment techniques is crucial for reducing pollutant accumulation in the environment. This paper highlights recent advances in the electrochemical advanced oxidation method and other processes for treating pharmaceuticals, dyes, and pesticide-polluted effluents.
ENVIRONMENTAL RESEARCH
(2024)
Article
Environmental Sciences
Muhammad Zohaib Nawaz, Huda Ahmed Alghamdi, Mehvish Zahoor, Fizzah Rashid, Atheer Ahmed Alshahrani, Nuha S. Alghamdi, Arivalagan Pugazhendhi, Daochen Zhu
Summary: Periodontitis is a severe gum disease with global health and economic implications. Current therapies have limitations, but nanotechnology offers potential in developing novel periodontal therapeutic materials. This study investigated the antimicrobial properties of metal-doped silica nanoparticles and identified silver- and zinc-doped silica as effective agents against periodontitis-causing microbes.
ENVIRONMENTAL RESEARCH
(2024)
Article
Chemistry, Physical
Nachimuthu Venkatesh, Govindhasamy Murugadoss, Govindhan Thiruppathi, Palanisamy Sundararaj, Pachagounder Sakthivel, Arivalagan Pugazhendhi, Manavalan Rajesh Kumar
Summary: Tin sulphide nanoparticles, both pure and cobalt-doped, were successfully synthesized using a simple co-precipitation method. The nanoparticles exhibited excellent photocatalytic activity, with cobalt doping playing a key role in enhancing the efficiency and stability of the photocatalyst. The synthesized nanoparticles effectively degraded crystal violet and bromophenol blue dyes under natural sunlight, with cobalt-doped SnS showing a photodegradation efficiency of 95.5% and 93.0% for CV and BP, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Review
Environmental Sciences
Muthiyal Prabakaran Sudhakar, Rahulkumar Maurya, Sanjeet Mehariya, Obulisamy Parthiba Karthikeyan, Gopal Dharani, Kulanthiyesu Arunkumar, Sandra V. Pereda, Maria C. Hernandez-Gonzalez, Alejandro H. Buschmann, Arivalagan Pugazhendhi
Summary: This review summarizes and discusses the production of polymer precursors from microalgae and macroalgae through direct conversion and fermentation routes, highlighting the economic feasibility of direct conversion methods and the emphasis on fermentation-based bioplastic precursor production. The paper also outlines the current state of technological developments in algae-based bioplastic production, including industry and research, and emphasizes the creation of novel solutions for green bioplastic production using algal polymers. Furthermore, the review mentions the cost economics of bioplastic production using algal biopolymers and provides future directions for next level bioplastic production.
ENVIRONMENTAL RESEARCH
(2024)
Article
Energy & Fuels
Yingji Wu, Yan Yuan, Changlei Xia, Tahani Awad Alahmadi, Sulaiman Ali Alharbi, Manigandan Sekar, Arivalagan Pugazhendhi
Summary: This study focuses on improving fuel quality by introducing hydrogen into waste tire pyrolysis oil. The addition of hydrogen was found to improve the combustion process and reduce harmful gas emissions. Waste tire pyrolysis oil blended with hydrogen showed promising performance as an alternative fuel for diesel engines.
Article
Energy & Fuels
Abdulraheem S. A. Almalki, A. Alhadhrami, Walaa F. Alsanie, S. K. Kamarudin, Arivalagan Pugazhendhi
Summary: The development of electric vehicles poses a threat to existing vehicles. Research on bioliquid fuels is still compromised, and finding a suitable fuel is crucial. This study focuses on the synthesis of TiO2/AlSBA-15 composite material using lemon peel extract as an organic reducing agent. The catalyst was characterized and showed promising activity in converting used cooking oil into condensable liquids with high gasoline range hydrocarbon content.
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.
