Article
Green & Sustainable Science & Technology
Pingbo Zhang, Peng Liu, Mingming Fan, Pingping Jiang, Agus Haryono
Summary: Magnetic mesoporous solid acid catalysts, modified by two different methods, exhibited ordered mesoporous structure and excellent paramagnetic properties, leading to high catalytic activity in the transesterification of palm oil with methanol for biodiesel production. Particularly, the catalyst prepared by the grafting method showed excellent reusability with over 80% biodiesel yield after 6 cycles, demonstrating promising industrial application prospects.
Article
Chemistry, Multidisciplinary
Gicheon Lee, Chanmin Lee, Hyungjin Kim, Yukwon Jeon, Yong-Gun Shul, Jinwon Park
Summary: A composite nanoparticle with an acid-base bifunctional structure has been developed for the transesterification of rapeseed oil, showing improved fatty acid methyl ester conversions compared to pure nanoparticles. The optimal catalyst with a triazole:PWA ratio of 6:1 exhibited the best performance due to its large surface area, balanced acidity, and strong basicity.
Article
Green & Sustainable Science & Technology
Ningmeng Hu, Ping Ning, Liang He, Qingqing Guan, Yuzhen Shi, Rongrong Miao
Summary: The acid-base bifunctional catalyst (CunO-Bs/SBA-15) prepared by loading boron-doped copper oxides onto SBA-15 mesoporous molecular sieve shows excellent catalytic performance in triglyceride transesterification, achieving a high biodiesel yield at near room temperature. The catalyst contains highly-dispersed acid-base sites without blocking the channels of the porous support, indicating a promising catalytic mechanism during transesterification.
Article
Chemistry, Applied
Vahide Nuran Mutlu, Selahattin Yilmaz
Summary: The glycosidation of glucose with n-butanol was studied using sulphated Zr and tungstophosphoric acid incorporated SBA-15 catalysts, showing improved acidity and higher yields of butyl glucoside. The TPA-SBA-15 catalyst demonstrated the highest activity and selectivity, with stable and reusable performance. Further studies on reaction temperature and catalyst amount were conducted to optimize the reaction parameters.
Article
Energy & Fuels
Karolina Jaroszewska, Janusz Nowicki, Hanna Nosal-Kovalenko, Jolanta Grzechowiak, Katarzyna Pstrowska, Rafal Luzny, Marek Lewandowski, Jan Kaczmarczyk, Anna Witek-Krowiak, Konstantinos Moustakas, Katarzyna Chojnacka, Marek Kulazynski
Summary: This study investigates the preparation and application of mesoporous silica-supported basic and acidic catalysts in transesterification. The investigated catalysts exhibit high activity and selectivity in the transesterification of canola oil.
Article
Chemistry, Applied
Wenlan Cai, Xiaoyan Ni, Fanyong Meng, Lin Sun, Runwei Wang, Sen Lin
Summary: The acid-free synthesis of Ga-containing SBA-15 mesoporous materials allows for tuning their morphological and acidic properties. Ga-SBA-15 exhibits high acid amount and adjustable morphology due to the presence of dispersed bending particles. The improved interparticle-type mesoporosity of Ga-SBA-15 provides highly accessible active sites for large molecules. Ga-SBA-15 also shows a shift from Bro center dot nsted-type acidity to Lewis-type acidity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
Edgar Tututi-Rios, Horacio Gonzalez, Denis A. Cabrera-Munguia, Aida Gutierrez-Alejandre, Jose L. Rico
Summary: Through the sol-gel method, Sn-SBA-15 catalysts modified with -PrSO3H groups were synthesized, which significantly improved the acid properties of the catalysts and increased the conversion rate of the esterification reaction between oleic acid and methanol.
Article
Thermodynamics
Yu Shen, Qi Zhang, Xiaolong Sun, Yingshi Zhang, Qilin Cai, Weifeng Deng, Shuhui Rao, Xi Wu, Qing Ye
Summary: A microalgae carbon based magnetic solid acid catalyst (MCMSA) was prepared using microalgal residue after lipids extraction as carbon source through magnetization, carbonization and sulfonation. The optimized MCMSA exhibited high specific surface area (124.70 m2/g), high acidity (3.64 mmol/g) and high magnetism (1.042 emu/g). It showed good thermal stability and high conversion efficiency (98.51%) in the microwave-assisted catalytic transesterification, making it a promising catalyst for microalgae biodiesel production.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Energy & Fuels
En-Chin Su, Jing-Ning Hsu, Yi-Chen Lin, Hui-Hsin Tseng
Summary: A bifunctional catalyst, Na2O2/SBA-16-SO3H, was successfully developed for the conversion of waste cooking oil (WCO) to biodiesel. The catalyst showed significantly improved conversion efficiency by simultaneously accelerating transesterification and esterification reactions. Adjusting the methanol/WCO molar ratio and free fatty acid content further enhanced the catalyst activity and reduced reaction time.
Article
Biotechnology & Applied Microbiology
Amal A. AlKahlaway, Mohamed A. Betiha, Delvin Aman, Abdelrahman M. Rabie
Summary: A highly efficient Lewis acidic catalyst Fe-2(MoO4)(3) was successfully prepared for esterification of oleic acid with ethanol, showing good catalytic activity for biodiesel production. The kinetic study revealed first-order kinetics with low activation energy, while thermodynamic analysis indicated an endothermic reaction.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Chemistry, Physical
G. Dhinagaran, G. Vijayakumar, S. Prashanna Suvaitha, G. Harichandran, K. Venkatachalam
Summary: Conversion of non-edible oils to biodiesel is an important alternative, and the use of SBA-15 supported sulphated zirconia catalyst (SO42-/ZrO2(5,10,15 wt%)/SBA-15) shows promising results in the transesterification of neem oil.
Article
Green & Sustainable Science & Technology
Himmat Singh, Amjad Ali
Summary: A heterogeneous catalyst of K+ impregnated tungstophosphoric acid supported on graphene oxide was used for one pot esterification and transesterification of waste oil (WO). The catalyst structure was characterized by XRD, and its composition was confirmed by XPS analysis. TPD technique showed the presence of acidic and basic sites on the catalyst surface. Under optimized conditions, >98.5% biodiesel was produced within 1.5 h using a catalyst loading of 10 wt% (concerning oil), methanol: oil molar ratio of 9:1, and a reaction temperature of 65 degrees C. The catalyst could be recycled six times with metal levels in the reaction mixture below 2 ppm, and it showed activity even in the presence of free fatty acid and moisture contents.
Article
Green & Sustainable Science & Technology
Qiaofei Zhang, Wenlei Xie, Jiangbo Li, Lihong Guo
Summary: Bimetallic silica mesoporous composites with different Zr/Al molar ratios were synthesized via a one-step hydrothermal method and sulfated with sulfuric acid to obtain a series of sulfated Zrx-Aly-KIT-6 catalysts. The catalysts exhibited a large amount of acidic sites derived from Zr and Al incorporation and further sulfation, and the acidic strength was greatly influenced by the inductive effect of SO42- species. The interconnected mesoporous structure and enhanced mass transfer facilitated efficient transesterification reactions.
Article
Agricultural Engineering
Bahar Ghasemzadeh, Amir Abbas Matin, Biuck Habibi, Mostafa Ebadi
Summary: This research aims to design and prepare a new magnetically recoverable catalyst based on agrowastes, specifically cotton waste, for the production of biodiesel. The proposed core-shell nanocomposite catalyst showed excellent performance in catalyzing transesterification reaction and achieved optimal results under certain conditions.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Green & Sustainable Science & Technology
Kristine Lazdovica, Valdis Kampars, Anastasija Gaile
Summary: Designing a cost-effective and environmentally friendly heterogeneous catalyst is necessary for biodiesel production. In this study, new catalysts of 0.3-CaO-MgO/SBA-15 and 0.8-CaO-MgO/SBA-15 were prepared and compared. The 0.3-CaO-MgO/SBA-15 catalyst exhibited higher purity, larger surface area, and pore volume, leading to excellent catalytic activity for biodiesel production.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Huayan Zheng, Nilesh Narkhede, Linyi Han, Huacheng Zhang, Zhong Li
RESEARCH ON CHEMICAL INTERMEDIATES
(2020)
Article
Chemistry, Multidisciplinary
H. Zheng, N. Narkhede, Z. Li
Article
Chemistry, Applied
Lifei Yan, Tingjun Fu, Dan Zhao, Jiajun Wang, Nilesh Narkhede, Huayan Zheng, Guoqiang Zhang, Zhong Li
APPLIED ORGANOMETALLIC CHEMISTRY
(2020)
Article
Chemistry, Applied
Huayan Zheng, Nilesh Narkhede, Guoqiang Zhang, Zhong Li
APPLIED ORGANOMETALLIC CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Lifei Yan, Tingjun Fu, Jiajun Wang, Nilesh Narkhede, Zhong Li
JOURNAL OF CHEMICAL RESEARCH
(2020)
Article
Chemistry, Analytical
Varsha Brahmkhatri, Parimal Pandit, Pranita Rananaware, Aviva D'Souza, Mahaveer D. Kurkuri
Summary: The supply of safe drinking water is a prominent global challenge, mainly due to chemical and biological toxins. Nanomaterial-based sensors, particularly plasmonic sensors, have provided solutions for ultra-sensitive detection, with noble metal nanoparticles of gold and silver playing a key role. The emphasis on design and fabrication of plasmonic sensors has been crucial in enhancing their affinity towards specific pollutants, leading to more effective and efficient on-site detection of toxin contaminants.
TRENDS IN ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Applied
Parimal Pandit, Stuti Bhagat, Pranita Rananaware, Zinia Mohanta, Manoj Kumar, Vivek Tiwari, Sanjay Singh, Varsha P. Brahmkhatri
Summary: This study reports a novel strategy for the design and fabrication of an iron oxide nanoparticle encapsulated dual MOF composite, decorated with folic acid as a targeting agent and Quercetin as a drug payload. The resultant nanocomposites exhibited effective anticancer activities and targeted delivery in breast cancer cells, making them a potential theranostics agent for cancer therapy.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Correction
Chemistry, Applied
Parimal Pandit, Pranita Rananaware, Aviva D'Souza, Mahaveer D. Kurkuri, Varsha Brahmkhatri
JOURNAL OF POROUS MATERIALS
(2022)
Article
Chemistry, Applied
Parimal Pandit, Pranita Rananaware, Aviva D'Souza, Mahaveer D. Kurkuri, Varsha Brahmkhatri
Summary: Diatoms are unicellular photosynthetic algae found in all water territories, with potential applications in catalysis, drug delivery systems, adsorbents, and bio-photonics. Functionalized diatoms with thiol groups and decorated with silver or gold nanoparticles were synthesized for oxidation reactions and environmental applications
JOURNAL OF POROUS MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Pranita Rananaware, Varsha P. Brahmkhatria, Debatrayee Dasgupta, Anjali Patel
Summary: The study focuses on the role of 12-tungstophosphoric acid (TPA) functionalized nMCM-48 as a drug delivery carrier for weakly soluble polyphenols, curcumin and quercetin. The TPA functionalized nMCM-48 exhibits high pore volume, pore diameter, and high surface area, which are essential for drug loading and release. Both curcumin and quercetin are successfully encapsulated in TPA-functionalized nMCM-48, resulting in nanocomposites with enhanced antimicrobial efficiency. The drug release studies show a release rate of 69% for C-TPA/nMCM-48 and 67% for Q-TPA/nMCM-48.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Physical
Varsha P. Brahmkhatri, Amrinder Singh, Arpan Chakraborty, R. Shankararama Sharma, Kousik Chandra, Hanudatta S. Atreya
Summary: This study reports the multilayer protein-protein interactions in the ubiquitin corona on a gold nanorod surface for the first time. The conformational dynamics of the protein were studied using solution nuclear magnetic resonance spectroscopy, and the interaction between ubiquitin and gold nanorods was characterized using various techniques. The study reveals the formation of hard and soft coronas on the nanorod surface, as well as the conformational reorientation of the hard corona with increasing protein concentration.
APPLIED SURFACE SCIENCE ADVANCES
(2022)
Article
Chemistry, Multidisciplinary
Pranita Rananaware, Parimal Pandit, Seekha Naik, Monalisa Mishra, Rangappa S. Keri, Varsha P. Brahmkhatri
Summary: Quercetin, a plant polyphenol with antioxidant and anti-inflammatory activity, has been conjugated with polyvinylpyrrolidone and gold nanoparticles to form nanorods. These conjugates show enhanced drug release and inhibit amyloid aggregation in lysozyme, making them potential therapeutic agents for neurological diseases like Alzheimer's and Parkinson's.
Article
Chemistry, Physical
Nilesh Narkhede, Huayan Zheng, Huacheng Zhang, Guoqiang Zhang, Zhong Li
CATALYSIS SCIENCE & TECHNOLOGY
(2020)
Article
Chemistry, Applied
Guoqiang Zhang, Jiahao Liang, Jiao Yin, Lifei Yan, Nilesh Narkhede, Huayan Zheng, Zhong Li
MICROPOROUS AND MESOPOROUS MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Nilesh Narkhede, Bhawna Uttam, Chebrolu Pulla Rao
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.
