Article
Energy & Fuels
A. Mack, J. Maier, G. Scheffknecht
Summary: This study aims to gather experimental data on the combustion behavior of single wood particles under oxyfuel conditions. The focus is to understand how the application of oxyfuel technology affects the conditions in fuel beds and provide data for simulations. Combustion experiments were conducted on spherical particles of different sizes with varying oxygen concentrations in different atmospheres. The results showed that combustion times were generally shorter under oxyfuel conditions compared to air conditions, and increasing oxygen concentration further reduced combustion durations. The temperatures of the flame and the particles increased with higher oxygen concentration, with smaller particles showing higher values. Steam concentration had a varying effect on temperatures.
Article
Energy & Fuels
Stefan Mueller, Lara Theiss, Benjamin Fleiss, Martin Hammerschmid, Josef Fuchs, Stefan Penthor, Daniel C. Rosenfeld, Markus Lehner, Hermann Hofbauer
Summary: This study successfully achieved the goal of replacing the natural gas demand in integrated hot metal production by utilizing a biomass gasification plant and an electrolysis unit. Through calculations, it was shown that a natural gas demand of about 385 MW can be replaced and an additional 100 MW hydrogen-rich reducing gas can be produced using 132 MW of biomass and 571 MW of electricity produced from renewable energy.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Engineering, Chemical
Julius Motuzas, Shaomin Liu, Joao C. Diniz da Costa
Summary: Perovskite compounds can be used for oxygen separation from air to reduce greenhouse gas emissions, with Ba and Ca substitutions showing different oxygen release performances. Ba substitution with short temperature cycles demonstrates more efficient oxygen release, which is significant for oxygen separation and oxyfuel energy systems.
Article
Materials Science, Ceramics
Qiuwan Shen, Yuhang Jiang, Shian Li, Guogang Yang, Bengt Sunden
Summary: PrBaCo2O5+delta double perovskite oxide was first applied as an oxygen carrier for oxygen production, and its oxygen adsorption/desorption performance and cyclic performance were studied. The results showed that PrBaCo2O5+delta exhibits good stability and reactivity.
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Tingru Chen, Takuya Hasegawa, Yusuke Asakura, Masato Kakihana, Teruki Motohashi, Shu Yin
Summary: The study successfully synthesized YBaCo4O7+delta sample using a glycine-complex decomposition method at a low temperature, and demonstrated its superior oxygen storage performance in temperature swing adsorption process.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Energy & Fuels
Pu Hong, Lin Li, Yuanqiang Duan, Yueming Wang, Lunbo Duan
Summary: Oxy-fuel combustion is an important means of reducing CO2 emissions in coal-fired power plants. This study explores the influence of the gasification reaction on oxy-fuel combustion and decouples the contribution ratio of the gasification reaction. The results show that increasing pressure, temperature, and oxygen concentration promotes the combustion process and increases the combustion rate. The problem of low combustion rate in oxy-fuel combustion can be solved by increasing the O2 concentration.
Article
Energy & Fuels
Xu Shao, Botao Qin, Quanlin Shi, Yixuan Yang, Zujie Ma, Yizhen Xu, Mingyu Hao, Zhe Jiang, Wenjie Jiang
Summary: This study proposes an innovative approach to utilize fly ash waste for CO2 sequestration and prevent spontaneous combustion of coal. The experiments show that the quantity and rate of CO2 sequestration are influenced by the initial CO2 pressure and water-to-solid ratio. The study also demonstrates that carbonated fly ash slurry can reduce the specific surface area and pore volume of coal and effectively inhibit spontaneous combustion of coal.
Article
Thermodynamics
J. Krzywanski, T. Czakiert, W. Nowak, T. Shimizu, A. Zylka, K. Idziak, M. Sosnowski, K. Grabowska
Summary: This study presents a novel predictive model based on fuzzy logic for estimating the concentrations of gaseous pollutants in flue gases from coal and biomass combustion in circulating fluidized bed units. The model was validated and showed good agreement with experimental results.
Article
Energy & Fuels
Zhiwei Yang, Dishant Khatri, Piyush Verma, Tianxiang Li, Adewale Adeosun, Benjamin M. Kumfer, Richard L. Axelbaum
Summary: Pressurized oxy-combustion is a promising technology for low-carbon, fossil fuel utilization. Washington University in St. Louis has proposed a new pressurized oxy-combustion process, which has the potential to improve efficiency and economics. The pilot-scale experimental results show promise for the new burner and furnace design.
Review
Green & Sustainable Science & Technology
A. G. Olabi, Tabbi Wilberforce, Khaled Elsaid, Enas Taha Sayed, Hussein M. Maghrabie, Mohammad Ali Abdelkareem
Summary: Carbon capture is a key action in mitigating climate change and global warming by reducing carbon emissions. Various process industries, such as cement, iron and steel, oil refinery, and chemicals, are important sources of carbon emissions and provide potential opportunities for carbon capture. However, the main challenge lies in the high cost of implementing carbon capture in process industries.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Energy & Fuels
A. Mack, J. Maier, G. Scheffknecht
Summary: The objective of this study is to increase the CO2 concentration in the flue gas by applying oxyfuel combustion technology to grate incineration systems. The results show that oxyfuel combustion leads to higher CO2 concentration but also increased CO emission rates compared to air combustion. The combustion behavior and temperature distribution differ significantly between air and oxyfuel conditions.
JOURNAL OF THE ENERGY INSTITUTE
(2022)
Article
Engineering, Chemical
Mikhail Gorbounov, Ben Petrovic, Serap Ozmen, Peter Clough, Salman Masoudi Soltani
Summary: Climate change and global warming, caused by anthropogenic CO2 emissions, is recognized as the largest threat to global ecosystems. Utilizing biomass ash from combustion as a source for activated carbon production not only valorizes waste into value-added products, but also provides an abundant and cost-effective material for post-combustion carbon capture. This research focuses on the preparation and characterization of biomass ash-derived activated carbon with optimized yield and CO2 uptake, achieving nearly double the adsorption capacity compared to virgin biomass ash-derived carbon.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Chemical
Shilin Liu, Xuexiang Fu, Yi Xu, Zengmin Lun, Chunpeng Zhao, Haitao Wang, Dengfeng Zhang
Summary: This study investigated the impact of water on the adsorption and desorption of nitrous oxide in coal, revealing that H2O significantly hinders the adsorption and diffusion capability of N2O within coals and enhances the chemical transformation among nitrogen-containing species. The focus of practical N2O geologic sequestration should be on the effects of in-situ H2O within coal reservoirs.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Review
Engineering, Chemical
S. R. Shewchuk, A. Mukherjee, A. K. Dalai
Summary: The paper discusses the impact of greenhouse gas emissions on global warming, and highlights post-combustion capture technology as a CO2 mitigation strategy. It systematically evaluates the performance of different adsorbents and proposes sustainable practices for converting CO2 into valuable chemicals like higher hydrocarbons.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Agriculture, Multidisciplinary
Summer R. A. Lockhart, Kent Keller, David Evans, Lynne A. Carpenter-Boggs, David R. Huggins
Summary: Organic agriculture can lead to higher concentrations and production rates of soil CO2 compared to no-till agriculture. However, the effect of agricultural management techniques on soil CO2 is not well understood.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2023)
Article
Engineering, Environmental
Huawang Zhao, Xiaoyin Chen, Alexander J. Hill, Guohua Jing, Yongdan Li, Johannes W. Schwank
Summary: Pd/SSZ-13 catalysts were investigated for the simultaneous storage of NO and C3H6 at 100 degrees C. The effects of the state of Pd species on co-adsorption and release were studied under simulated exhaust conditions. The results showed that the NO storage capacity at 100 degrees C was enhanced by simultaneous NO + C3H6 adsorption. DRIFTs results showed that Pd2+ provides the adsorption sites for NO + C3H6 to form Pd2+(NO) (C3H6), which alleviates the inhibition effect of H2O on NO adsorption on Pd ions. The different release behaviors of NO + C3H6 are discussed based on the chemistry of NO and C3H6 adsorption and the effect of intermediate CO.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Huanghao Ning, Wenxue Ji, Yongdan Li, Cuijuan Zhang
Summary: Thermal treatment can improve the catalytic activity of the 5 wt% BaMnO3-CeO2 composite catalyst for NO decomposition. The diffusion of Ce species from CeO2 to BaMnO3 lattice generates oxide ion vacancy, accelerating the rate-determining step and enhancing the catalytic activity.
Article
Chemistry, Physical
Jiashu Yuan, Xiaotang Shi, Qianyuan Qiu, Penghui Yao, Yonggao Xia, Yicheng Zhao, Yongdan Li
Summary: In this study, a flexible freestanding anionic metal-organic framework (MOF)-based membrane was successfully prepared through a solution casting method, which exhibited impressive ionic selectivity and conductivity. The membrane enabled high-capacity retention and accelerated uniform lithium deposition, leading to improved performance of the nonaqueous redox flow batteries (NARFBs).
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Running Kang, Zirui Zhang, Feng Bin, Xiaolin Wei, Yongdan Li, Guoxing Chen, Xin Tu
Summary: The effects of catalyst support on the CO catalytic ignition performance and reaction pathways were investigated, and it was found that TiO2 or ZSM-5 supports promote copper dispersion and the oxidation process mainly occurs at the phase interface. The Cu and Ce interactions lead to the formation of solid solutions, which enhance the activity of individual copper sites and favor the ignition of CO at low temperatures. The Cu2+ species are reduced to form dicarbonyls, which also take part in the oxidation process.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Yushuai Sang, Yuhan Ma, Gen Li, Kai Cui, Mingze Yang, Hong Chen, Yongdan Li
Summary: The dissolution and solvolysis processes of enzymatic hydrolysis lignin (EHL) in ethylene glycol were investigated. Ethylene glycol exhibited high EHL solubility and achieved complete EHL dissolution at room temperature. The interactions between ethylene glycol and EHL, such as van de Waals interactions, were found to break the pi-pi stacking in EHL, resulting in complete EHL dissolution. When NaOH and Ni were used as co-catalysts, EHL was efficiently depolymerized at 200 degrees C, and the overall monomer yield reached 18.8 wt%. Fourier transform infrared spectroscopy (FT-IR) and molecular dynamics simulation results showed that the adsorption of ethylene glycol over Ni surface hindered the adsorption of lignin fragments and monomers. Thus, EHL catalytic solvolysis in ethylene glycol occurred in the liquid phase, where OH- of NaOH promoted the EHL linkage breakage and active hydrogen atoms formed on Ni surface stabilized the active monomers.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
Mengyuan Wang, Xiaosong Zhang, Ziyin Guo, Chunhua Chen, Jiashu Yuan, Yongdan Li, Yonggao Xia, Ya-Jun Cheng
Summary: In this paper, a two-step carbon coating process is developed to suppress irreversible phase transition and excessive side reactions at the electrode-electrolyte interface for high-nickel ternary cathode materials LiNi0.8Co0.1Mn0.1O2 (NCM811). Sucrose is melted and coated onto the particle surface, which is converted into carbon in situ at elevated temperature under oxygen atmosphere. The carbon coating treatment effectively improves the cyclic (96.7% capacity retention after 100 cycles at 1 C) and rate performance (130 mAh g(-1) at 5 C) of the NCM811 cathode.
ELECTROCHIMICA ACTA
(2023)
Article
Engineering, Environmental
Ying Li, Dongdong Chen, Xin Xu, Xinyu Wang, Running Kang, Mingli Fu, Yanbing Guo, Peirong Chen, Yongdan Li, Daiqi Ye
Summary: This review summarizes recent advances in passive NOx adsorbers (PNA) based on palladium-exchanged zeolites for efficient reduction of harmful nitrogen oxides (NOx) emitted from low-temperature diesel exhausts during cold-start conditions. The review discusses the choice of parent zeolite, Pd precursor, and synthetic method for Pd-zeolite synthesis, as well as the effect of hydrothermal aging on Pd-zeolite properties and PNA performance. Mechanistic insights into Pd active sites, NOx storage/release chemistry, and interactions with exhaust components/poisons are gained through the integration of experimental and theoretical methodologies. Novel designs of PNA integration into exhaust after-treatment systems are also presented, along with discussions on major challenges and implications for further development and real-world application of Pd-zeolite-based PNA in cold-start NOx mitigation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Parminder Kaur, Moonis Ali Khan, Yongdan Li, Ahmed A. S. Al-Othman, Zeid Abdullah Alothman, Mika Sillanpaa, Ville Kuokkanen, Monzur A. Imteaz, Saleh Al-Farraj
Summary: The effectiveness of bifacial mixed metal-metal organic framework (MOF) anodes for municipal wastewater's photoelectro-catalytic (PEC) treatment is explored. The removal efficiency of pollutants from municipal wastewater and the impact of operational parameters are verified using TiO2-Bi(mixed metal)-MOF and TiO2-Sb(mixed metal)-MOF anodes in a visible light range. The study shows that TiO2-Bi(mixed metal)-MOF anodes in the PEC system play a positive role in removing micropollutants and disinfecting municipal wastewater, with high efficiency.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Materials Science, Multidisciplinary
Oscar Ovalle-Encinia, Jerry Y. S. Lin
Summary: This work evaluates the characteristics of porous ceramic tubes prepared by centrifugal casting (CC) and cold isostatic pressing (CIP) methods. The results show that CIP method produces ceramic tubes with lower porosity and average pore size, suitable for low porosity or dense ceramic tubes, while CC method is suitable for high-porosity ceramic tubes or tubes with pore gradient tube wall.
JOURNAL OF MATERIALS SCIENCE
(2023)
Review
Biochemistry & Molecular Biology
Huanghao Ning, Yongdan Li, Cuijuan Zhang
Summary: Reducing CO2 emissions and converting it into valuable chemicals is important, and integrating the capture and utilization processes is a feasible option to reduce transportation costs.
Article
Engineering, Environmental
Yihan Zhen, Cuijuan Zhang, Yongdan Li
Summary: By functionalizing with imidazole and grafting with an oligoether chain, a ferrocene derivative 1-ferrocenylmethyl-3-(2-(2-(2-methoxyethoxy)ethoxy)ethyl)imidazolium-bis(trifluoromethylsulfonyl)imide (FcMITEGTFSI) is designed. The imidazolium cationic group induces a positive shift in redox potential of the ferrocene core while ensuring the stability of the active species; the flexible oligoether side chain renders the molecule liquid at room temperature and miscible with acetonitrile solvent. The flow battery exhibits robust cycling stability, with an overall discharge capacity retention of approximately 95.5% after 200 cycles, corresponding to a capacity retention of approximately 99.98% per cycle at 25 mA cm(-2) with 0.1 M electrolyte.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Xuelan Hou, Hang Zhang, Ramesh Raju, Yongdan Li, Peter D. Lund
Summary: Improving light absorption and conversion ability is crucial for enhancing the performance of photoelectrochemical (PEC) cells in converting solar radiation into chemical energy. This study demonstrates a simple and low-cost method to prepare a nanostructured TiOx film with tunable absorption range from 250 to 2500 nm, surpassing the absorption edge of TiO2. The film shows superior light capture ability and a 10-fold increase in charge carrier transfer rate under AM 1.5 G light. It has potential for large-area PEC cells with promoted charge carriers' transfer.
JOURNAL OF POWER SOURCES
(2023)
Article
Electrochemistry
Bingxue Wu, Jian Zhang, Zhi Yang, Xuanlin Lu, Xin Zhao, Wen Liu, Jiaxuan Chen, Yicheng Zhao, Yongdan Li
Summary: In this study, a Ni-Ce0.8Sm0.2O2-δ anode with low Ni content is successfully synthesized through a polymer-directed evaporation-induced self-assembly strategy. The anode exhibits an enlarged triple-phase boundary region and improved reactivity of lattice oxygen due to the even distribution of Ni. With 5 wt.% Ni, the anode shows the lowest polarization resistance and the highest amounts of oxygen vacancies and Ce3+/Ce4+ redox pairs, resulting in improved charge transfer process and excellent stability.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Energy & Fuels
Linzhe Zhao, Yongdan Li, Cuijuan Zhang
Summary: In this study, amorphous Co-Mn binary oxides loaded on porous carbon nanosheets were prepared and their composition, microstructure, and ORR/OER performance with different calcination temperatures were investigated. The amorphous CoMn2Ox supported on carbon nanosheets showed higher ORR/OER bifunctional electrochemical performance in terms of activity and stability. The rechargeable zinc-air battery with the amorphous CoMn(2)Ox on carbon nanosheets as air electrode achieved a peak power density of 89.6 mW cm(-2) and maintained stable operation for about 500 cycles at 10 mA cm-2. The ORR/OER bifunctional performance was closely related to the microstructure, oxidation states of Co/Mn species, and their corresponding proportions. Although there is still room for performance enhancement, this work provides insights into the development of high-performance and cheap ORR/OER bifunctional catalysts for rechargeable metal-air batteries by engineering the crystallinity of the metal oxides.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Jinze Wu, Hui Liu, Yongdan Li, Cuijuan Zhang
Summary: Amorphous BiOx, prepared on the surface of NASICON electrolyte using the photochemical metal-organic deposition method, can greatly enhance the interfacial properties at the anode side. The Na symmetric cell operates at a critical current density of 1.2 mA cm(-2) and cycles steadily at 0.5 mA cm(-2) for 1000 h at 30 °C.
CHEMICAL COMMUNICATIONS
(2023)
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.