Article
Construction & Building Technology
Anjaneya Dixit, Hongjian Du, Juntao Dang, Sze Dai Pang
Summary: Adding fly ash (FA) to limestone-calcined clay (LC) blends improves the rheology of the concrete, with the LCF concrete demonstrating better performance in both early-age and later-age characteristics.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Construction & Building Technology
Eethar Thanon Dawood, Waseem Thabit Mohammed, Johann Plank
Summary: The study aims to design green mortar by using waste materials and environmentally friendly components to substitute cement and sand, while maintaining acceptable fresh and hardened properties of the mortar. Experimental results showed that the use of green mortar can reduce CO2 emissions, increase compressive strength, and improve flow properties of the mortar.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Yifei Wang, Lei Lei, Caijun Shi
Summary: The effects of DEIPA and EDIPA at dosages of 0.02% and 0.05% on the hydration and strength development of cement-fly ash-limestone ternary blend were investigated. It was found that both dosages of DEIPA and EDIPA promote the chemical effect of limestone and the hydration of aluminates from cement and fly ash. The hydration of silicates was accelerated by 0.02% of DEIPA or EDIPA but delayed by 0.05% due to excessive aluminates hydration. DEIPA and EDIPA also refine the pore structure and increase compressive strength of the blend mortar.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Sumaiya Afroz, Yingda Zhang, Quang Dieu Nguyen, Taehwan Kim, Arnaud Castel
Summary: This study examines the shrinkage properties of two sustainable aluminosilicate blends, namely fly ash and limestone-calcined clay (LC3). Paste and concrete samples were tested to determine the maximum replacement of binder while maintaining strength. The study analyzed the chemical and autogenous shrinkage of paste samples, and further investigated hydration using thermogravimetric analysis and Fourier transform infrared spectroscopy. By comparing different types of shrinkage, such as autogenous, drying, and total shrinkage, for concrete with specific compressive strength, the study found that LC3 exhibited higher autogenous shrinkage due to faster hydration compared to fly ash. Despite this, LC3 had lower drying shrinkage, making it a more sustainable and eco-friendly alternative to fly ash concrete when considering cement replacement levels, shrinkage, and ecological impact.
MATERIALS AND STRUCTURES
(2023)
Article
Construction & Building Technology
Sundar Rathnarajan, B. S. Dhanya, Radhakrishna G. Pillai, Ravindra Gettu, Manu Santhanam
Summary: Supplementary cementitious materials (SCMs) can be used to enhance sustainability and reduce carbon footprint in the concrete industry. This study evaluated the carbonation resistance of various concretes and developed a more generic model to estimate carbonation coefficients. The results demonstrate that SCMs can be used to design concretes with comparable long-term carbonation depth as ordinary Portland cement (OPC) concretes.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Construction & Building Technology
Wujian Long, Jing Xie, Xuanhan Zhang, Shicong Kou, Feng Xing, Chuang He
Summary: This work proposes a new method to overcome the slow setting and low early strength of cement-based composites with high-volume fly ash (HVFA). The effects of a binary system containing calcined hydrotalcite (CHT) and Na2SO4 (NS) on the early strength, hydration process, pore structure, and microstructural morphology of HVFA composites were investigated. Results showed that the CHT and NS co-doped system exhibited better performance in improving the mechanical properties and porosity of HVFA cement than the CHT or NS single system, due to the accelerated hydration process, increased hydration product content, and refined pore structure. These findings provide guidance for enhancing the early strength of HVFA concrete in practical engineering.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Wu-Jian Long, Jing Xie, Xuanhan Zhang, Yuan Fang, Kamal H. Khayat
Summary: This study proposed a novel method to improve the performance of cementitious composites blended with high-volume fly ash by using calcined layered double hydroxide. Experimental results showed that 0.5% CLDH addition can effectively increase the early-age strength of HVFA cementitious composites and alter the microstructure.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Construction & Building Technology
Yan He, Shuhua Liu, Xiong Zhang, Wenbin Liu, Gaoyu Liao, Mingfeng Xu
Summary: The study found that TEA had optimal strength enhancement effect of nearly 15% on the composite binder containing 30% fly ash and 10% limestone, while it had the worst effect of about 5% on the composite binder containing 30% slag and 10% fly ash. The addition of TEA prolonged the induction period, enhanced the formation of AFt, and significantly accelerated the pozzolanic reaction of fly ash.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Jun Liu, Zhen Liang, Hesong Jin, Gediminas Kastiukas, Luping Tang, Feng Xing, Jie Ren
Summary: This study investigates the feasibility of improving the properties of alkali-activated bottom ash (AABA) binders by incorporating limestone-calcined clay (LC2) or fly ash (FA). It was found that increasing the substitution with LC2 or FA in the AABA binders can increase the compressive strength and immobilization capacity of heavy metals. LC2 is more effective at higher Na2O dosages and FA results in the formation of N-A-S-H gels, while LC2 results in more C-A-S-H gels.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Liang Tian, Fangzheng Zhang, Juncheng Chen, Jinfeng Sun, Huajun Zhu
Summary: The present study investigates the influence of 2 wt% calcined sto & BULL;ber nano-SiO2 on the hydration properties of high volume fly ash system. The results show that the addition of 2 wt% calcined sto & BULL;ber nano-SiO2 effectively enhances cement hydration and improves the compressive strength of HVFA mortar.
JOURNAL OF BUILDING ENGINEERING
(2022)
Review
Construction & Building Technology
Meenakshi Sharma, Shashank Bishnoi, Fernando Martirena, Karen Scrivener
Summary: This article reviews the latest literature on limestone calcined clay cement (LC3), discussing its background, chemistry, production, influence of raw materials and production conditions, mixture design, mechanical and durability properties, as well as economic and environmental aspects. Suggestions for further research are also provided at the end of the paper.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Construction & Building Technology
Aunchana Kijjanon, Taweechai Sumranwanich, Warangkana Saengsoy, Somnuk Tangtermsirikul
Summary: This study investigates the properties of multibinder systems, including chloride penetration resistance, chloride binding capacity, electrical resistivity, and compressive strength. The results show that calcined kaolinite clay concrete performs better in terms of chloride penetration resistance and chloride binding ability compared to ordinary portland cement concrete. It also demonstrates higher compressive strength compared to OPC concrete and fly ash concrete. The ternary binder system of cement-fly ash-calcined kaolinite clay shows the best overall performance, with the C30F15 combination performing the best. Fly ash can also be beneficially integrated into the cement-calcined kaolinite clay binder system.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Engineering, Environmental
Javier Fermoso, Aimaro Sanna
Summary: Dry sorbent high temperature CO2 capture process is an effective technology for CO2 removal. The study found that adding Li2CO3 and Na2CO3 as promoters to fly ash derived potassium-aluminium silicates sorbents enhanced CO2 capture efficiency, with K-FAs_20%Na showing the best performance. The SEM-EXD analyses indicate that the formation of K/Na eutectic melt on the sorbent surface facilitates CO2 and K diffusion and protects from strong sintering, while detailed kinetics analysis revealed a double exponential kinetics for CO2 adsorption on K-FAs sorbents.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Construction & Building Technology
Yuxuan Liu, Tung-Chai Ling, Min Wang, Yu-You Wu
Summary: The combined use of calcined coal gangue and limestone can enhance the compressive strength of cement and improve the microstructure of the material, thus enhancing the mechanical performance.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Hong Huang, Xuerun Li, Francois Avet, Wilasinee Hanpongpun, Karen Scrivener
Summary: This study investigated the strength-promoting mechanism of alkanolamines on limestone-calcined clay cement (LC3). The results showed that TEA and TIPA exhibited different effects during hydration, with proper sulfate addition enhancing their effects.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Energy & Fuels
Pooya Lahijani, Maedeh Mohammadi, Abdul Rahman Mohamed
Summary: This study investigates the co-gasification of tire char and rambutan peel. The results show that high proportion of tire char inhibits the gasification reaction, while higher content of biomass promotes the reaction. In addition, natural catalysts in the biomass also have a synergistic effect on the reaction.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Environmental Sciences
S. Anthonysamy, P. Lahijani, M. Mohammadi, A. R. Mohamed
Summary: This study investigated the low-temperature oxidative uptake of NO on alkali-modified biochar, showing that the NO capture capacity was significantly improved after modification. The adsorption capacity of KOH-activated biochar reached 87.0 mg/g at 30 degrees C, mainly attributed to factors like oxygen functionalities and carbon defects.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Maher T. Alshamkhani, Pooya Lahijani, Keat Teong Lee, Abdul Rahman Mohamed
Summary: In this study, the switching voltage technique was used to efficiently exfoliate graphite in eutectic molten salts. The exfoliated graphene samples exhibited high production yields, low ID/IG ratios, and good electrical conductivities. Compared to constant voltage exfoliation, the switching voltage technique produced smoother graphene flakes with less agglomeration, crumbling, and wrinkling. Characterization analysis confirmed the smaller crystallite size, lower thickness, and higher quality and purity of the exfoliated graphene prepared using the switching voltage technique.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Sciences
Norhusna Mohamad Nor, Lau Lee Chung, Abdul Rahman Mohamed
Summary: The utilization of microwave heating and nitrogen-modification can generate adsorbents with superior performance for efficient removal of hydrogen sulfide (H2S). The modified palm shell activated carbon synthesized using microwave heating exhibited excellent properties, including a large surface area and new pore structures. Microwave heating assisted in the development of the adsorbent's properties and contributed to high removal of H2S at low adsorption temperature.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Energy & Fuels
Nuradibah Mohd Amer, Pooya Lahijani, Maedeh Mohammadi, Abdul Rahman Mohamed
Summary: This article reviews the recent studies on biochar as a material for carbon capture, including its preparation and modification methods, and the influence on its physical, chemical, and physicochemical properties. Biochar exhibits high CO2 adsorption performance and sustainable performance, which are crucial for large-scale CO2 capture.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Review
Chemistry, Physical
Lutfi Kurnianditia Putri, Boon-Junn Ng, Wee-Jun Ong, Siang-Piao Chai, Abdul Rahman Mohamed
Summary: This article reviews the potential, design strategies, and material progress of photoelectrochemical CO2 reduction reaction (PEC CO2RR), as well as summarizes and discusses various photocathode semiconductor materials. Finally, perspectives on the design of photocathodes for CO2RR and new paradigms in the field are proposed.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Applied
Ositadinma Chamberlain Iheanacho, Joseph Tagbo Nwabanne, Christopher Chiedozie Obi, Chinenye Adaobi Igwegbe, Chijioke Elijah Onu, Irvan Dahlan
Summary: In this study, the adsorptive dephenolization of aqueous solutions using thermally modified corn cob (TMCC) was investigated. The results showed that increasing the dosage and contact time of TMCC, as well as decreasing temperature and phenol concentration, favor the adsorption of phenol. The adsorption mechanism was found to involve intraparticle, film, and pore diffusion, as well as electrostatic attraction, pi-pi electron-donor interaction, and hydrogen bonding. The process was determined to be feasible, spontaneous, endothermic, and predominantly a physical process.
ADSORPTION SCIENCE & TECHNOLOGY
(2023)
Review
Chemistry, Inorganic & Nuclear
Bashaer Mahmoud Namoos, Abdul Rahman Mohamed, Khozema Ahmed Ali
Summary: The desire to improve photocatalytic activity is increasing, especially in semiconductors. Porous photocatalysts have been synthesized to improve surface area and reduce recombination of electron-hole pairs. This paper reviews recent works on porous photocatalysts, with a focus on synthesis and fabrication methods. The topotactic transition technique is the best method for metal oxide porous photocatalysts, while self-organizing blocks are the best method for polymeric porous photocatalysts, especially for growing and fixing 1D semiconductor nanomaterials on 3D and 2D semiconductors on 2D. The hard template method allows for better control of particle shape and size, but the template removal is non-ecofriendly, making the soft template method more favorable. The etching method, on the other hand, is suitable for fabricating porous photocatalysts through a membrane by utilizing the electrical charge created by moving electrons in the electrolyte as a driving force.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Irvan Dahlan, Oh Hong Keat, Hamidi Abdul Aziz, Yung-Tse Hung
Summary: This study investigated the synthesis of MOF-5 and its modification for the removal of malachite green (MG) dye. Waste-derived siliceous materials, such as rice husk ash (RHA) and/or coal fly ash (CFA), were used to prepare modified MOF-5 adsorbents at different ratios. The MOF-5/RHA&CFA/2:1 adsorbent was found to be the most effective for MG dye removal from aqueous solutions. The adsorption characteristics of the modified MOF-5 for MG dye removal were studied by varying various parameters.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Review
Engineering, Environmental
Michelle Mei Xue Lum, Kim Hoong Ng, Sin Yuan Lai, Abdul Rahman Mohamed, Abdulkareem Ghassan Alsultan, Yun Hin Taufiq-Yap, Mei Kee Koh, Mohamad Azuwa Mohamed, Dai-Viet N. Vo, Manjulla Subramaniam, Kyle Sebastian Mulya, Nathasya Imanuella
Summary: Air pollution from untreated sulfur dioxide-rich flue gas is a major environmental and human health issue. Many sulfur dioxide removal technologies have been developed, but conventional methods generate by-products. Catalytic reduction of sulfur dioxide offers a sustainable solution with high efficiency and the recovery of valuable solid sulfur. This review discusses recent advances and the potential of this technology.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Andi Mulkan, Nurin Wahidah Mohd Zulkifli, Husni Husin, Irvan Dahlan, S. Syafiie
Summary: This study focuses on converting jackfruit peel waste into a solid catalyst for biodiesel synthesis. By calcining the peel waste ash at different temperatures, it was found that calcination at 500 degrees C yielded the highest ash production of 92.38%. Potassium, calcium, and magnesium were identified as significant components in the catalyst, making it a promising candidate for biodiesel synthesis. The optimal conditions for the synthesis process were determined using response surface methodology, resulting in a methyl ester content of 98.88%.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Review
Chemistry, Multidisciplinary
Xin-Quan Tan, Wuwei Mo, Xinlong Lin, Jian Yiing Loh, Abdul Rahman Mohamed, Wee-Jun Ong
Summary: The electro/photocatalytic CO2 reduction reaction (CO2RR) is an important approach for the synthesis of renewable fuels and value-added chemicals. MXenes, a type of 2D transition metal carbides, nitrides, and carbonitrides, show great potential in electrocatalysis and photocatalysis due to their unique properties. This review provides an overview of recent advances in MXene-based catalysts for the electrocatalytic and photocatalytic CO2RR, including their structure, synthesis pathways, and activity enhancement strategies. The review also discusses the current state of research in the field and proposes future perspectives.
Article
Engineering, Environmental
Maher T. Alshamkhani, Lutfi Kurnianditia Putri, Pooya Lahijani, Keat Teong Lee, Abdul Rahman Mohamed
Summary: In this study, an electrochemically exfoliated graphene/graphite carbon nitride ((EG)/g-C3N4) heterojunction photocatalyst was synthesized for CO2 photoreduction to methane. The best-performing photocatalyst (0.075 EG-CN) showed a significant enhancement in CH4 production with 98.6% selectivity after 6 hours of light irradiation compared to pure CN. The developed photocatalyst exhibited high stability after consecutive cycles of CO2 photoreduction to CH4.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Chemistry, Physical
Xin-Quan Tan, Sue-Faye Ng, Abdul Rahman Mohamed, Wee-Jun Ong
Summary: This article introduces the recent advances in experimental and computational studies on the interfacial design of 0D nanostructures on 2D graphitic carbon nitride (g-C3N4). By engineering point-to-face contact between 2D g-C3N4 and 0D nanomaterials, heterojunction interfaces can be formed, which is beneficial for photocatalytic reactions. Different types of 0D nanostructures and synthesis strategies for photocatalytic applications are discussed.
Article
Chemistry, Physical
Jie-Yinn Tang, Chen-Chen Er, Lling-Lling Tan, Yi-Hao Chew, Abdul Rahman Mohamed, Siang-Piao Chai
Summary: This study systematically unraveled the effect of defect engineering on the properties and catalytic performance of graphitic carbon nitride (g-C3N4). By introducing various defect sites, the study achieved improved charge separation efficiency and CO2 adsorption affinity in g-C3N, providing a more feasible pathway for CO2 reduction.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
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.