Article
Chemistry, Physical
Shuai Lyu, Yuhu Wang, Jieshu Qian, Sixu Liu, Zhe Li, Yuhua Zhang, Li Wang, Jinlin Li
Summary: The study demonstrates that CO molecules can enhance the acidity strength of zeolite, increase the ratio of acid sites, and stabilize the intermediate, leading to high selectivity towards desired products.
Article
Chemistry, Physical
Nan Cui, Yong-Jun Liu, Peng-Long Jia, Peng Luo, Wei Huang
Summary: The addition of alkaline complexants significantly improved both the CO conversion rate and selectivity towards ethanol and higher alcohols, while reducing the formation of dimethyl ether and decreasing the deactivation rate of the catalysts. These catalysts promoted by alkaline complexants showed increased selectivity for ethanol and improved stability in a slurry bed reactor.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Jinhua Huang, Kaiyu Bai, Mengdi Gao, Wei Huang
Summary: It has been found that the precursors of CuZnAl slurry catalyst have a significant impact on its performance in ethanol synthesis. In this study, a series of slurry catalysts were prepared using different sol-gel and solution as precursors, and their catalytic performances were investigated. The results showed that the catalyst Al-Zn(g)-Cu(s) prepared using Zn gel and Cu solution as precursors exhibited the highest ethanol synthesis capacity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Tao Zhang, Chunyang Zeng, Yingquan Wu, Nana Gong, Jiaqian Yang, Guohui Yang, Noritatsu Tsubaki, Yisheng Tan
Summary: In this study, Ga3+ was used as an effective promoter to enhance the efficiency of the catalyst and inhibit the production of CO2. The addition of Ga3+ resulted in a decrease in the particle size of the catalyst and altered its acidity and basicity. X-ray diffraction, X-ray photoelectron spectroscopy, and other techniques were employed to characterize the structural variations with different amounts of Ga3+, revealing that Ga clusters coordinated with ZnCr2O4 play a key role in the catalytic performance.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Debora R. Strossi Pedrolo, Vitaly V. Ordomsky, Marcio Schwaab, Nilson R. Marcilio, Andrei Y. Khodakov
Summary: The study focused on designing metal-zeolite nanocomposite catalysts for Fischer-Tropsch synthesis, using ruthenium nanoparticles uniformly distributed in hierarchical BEA zeolites. By incorporating carbon nanotubes with supported metal oxide nanoparticles, the catalysts achieved higher activity and selectivity in the reaction.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Lina Wang, Fanhui Meng, Baozhen Li, Jinghao Zhang, Zhong Li
Summary: In this study, the direct conversion of syngas to light paraffins in a dual-bed fixed-bed reactor was investigated. The results showed that the dual-bed strategy offers a potential route for the direct conversion of syngas to valuable chemicals.
Editorial Material
Chemistry, Multidisciplinary
Yanfei Xu, Xiangyang Li, Mingyue Ding
Summary: Evaluating the techno-economic feasibility of coal-to-olefin technology based on Fischer-Tropsch synthesis can reduce the dependence of olefin production on limited petroleum resources.
Article
Energy & Fuels
Xiubin Hu, Jianbo Wang, Tinghai Wang, Chan Wang, Hongwei Zhang, Pei Yuan, Qingyan Cui
Summary: In this study, a high-efficiency mesoporous iron oxide catalyst was synthesized and the influence of alkali concentration on its crystal phase, morphology, and pore structure was investigated. The application of this catalyst in the slurry-phase hydrocracking of heavy oil led to an increase in the yields of gasoline and diesel distillates.
Article
Engineering, Chemical
Xiaowan Peng, Yun-Lei Peng, Meng Huo, Jin Zhao, Qiuwei Ma, Bei Liu, Chun Deng, Mingke Yang, Baocan Dong, Changyu Sun, Guangjin Chen
Summary: To enhance CO2 capture capacity and selectivity, researchers have developed a porous slurry composed of ZIF-8 and C16 isoparaffin. This optimized slurry exhibits low viscosity, high sorption speed, and low CO2 sorption heat. It also demonstrates higher CO2 sorption capacity and selectivity compared to existing commercial CO2 absorbents. Additionally, the slurry system can be easily regenerated through pressure swing, making it a promising alternative for separating IGCC gas with higher efficiency and lower energy cost.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Chemistry, Physical
Ru-Ri Lee, I-Jeong Jeon, Won-Jun Jang, Hyun-Seog Roh, Jae-Oh Shim
Summary: Hydrogen is primarily produced from fossil fuels through steam reforming, but alternative methods using waste as a resource are gaining attention. The water-gas shift reaction is crucial for hydrogen production from waste, but a suitable catalyst is needed due to the higher CO concentration in waste-derived syngas. This study reviews the development of catalysts for waste-derived hydrogen production and provides essential knowledge for catalyst design.
Article
Energy & Fuels
Yuanfeng Wang, Jingman Lu, Xiao Zhang, Xinyue Zhang, Bohan Zhang, Jianxun Wu, Dong Guan, Ying Zhang, Junyang Chen, Xinyi Feng, Yahe Zhang, Zhiyuan Zhou, Linzhou Zhang, Quan Shi
Summary: Comparative experiments of thermal cracking and slurry phase hydrocracking were conducted to systematically investigate the reaction mechanism of heavy oil. The molecular composition of sulfur and nitrogen compounds in the feedstock and their products was characterized. The participation of hydrogen in hydrocracking leads to a lower cracking rate and higher liquid yield compared to thermal cracking. Nitrogen- and sulfur-containing aromatics with high molecular condensation degree are refractory heteroatoms, while aromatics with ring number over 4 and exposed five-membered heteroaromatic rings have high saturation reactivity. The understanding of the complex reaction network and mechanism of heavy oil hydrocracking from both thermal reaction and hydrogenation perspectives is instructive for catalyst design and process optimization.
Article
Chemistry, Multidisciplinary
Lin Zhang, Zhongkai Bian, Kai Sun, Wei Huang
Summary: The suitable amount of Sn-modified slurry catalysts can effectively suppress the water gas shift reaction, enhance the selectivity of DME, and improve CO conversion by enhancing Cu dispersion and modulating acid property, respectively. The optimized bifunctional catalyst achieved 53.47% CO conversion with 82.12% DME selectivity.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Chengtao Wang, Wei Fang, Zhiqiang Liu, Liang Wang, Zuwei Liao, Yongrong Yang, Hangjie Li, Lu Liu, Hang Zhou, Xuedi Qin, Shaodan Xu, Xuefeng Chu, Yeqing Wang, Anmin Zheng, Feng-Shou Xiao
Summary: By constructing a stable nanochannel, a well-designed zeolite as a promoter can enhance the efficiency of Fischer-Tropsch synthesis to olefins.
NATURE NANOTECHNOLOGY
(2022)
Article
Chemistry, Physical
Ningyan Li, Pengfei Song, Xitao Wang, Kang An, Siran Zhang, Yi Wu, Yuan Liu
Summary: In this study, Co-based catalysts supported on TiO2 modified by La and Al were designed and a novel Co metal-CoAl2O4 active structure was constructed through surface solid reaction to facilitate the higher alcohol synthesis from syngas. The results showed that the formation of CoAl2O4 by the interaction between Co and Al maintained the stability of Co2+ in the catalyst and promoted the coupling of intermediates. Moreover, the modified catalyst exhibited a significantly higher conversion rate and selectivity of total alcohols compared to the bare Co/TiO2 catalyst.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Rei-Yu Chein, Wei-Hsin Chen, Hwai Chyuan Ong, Pau Loke Show, Yashvir Singh
Summary: This study analyzed the methanol synthesis performance using CO2 and syngas as feedstock, finding that increasing reactor diameter can enhance methanol yield but large pressure drops may reduce the yield. Removing water and increasing reaction temperature were found to increase methanol yield and CO2 conversion. Additionally, higher CH4 content in the biogas can lead to higher methanol production and using a higher recycle ratio for unreacted syngas can enhance methanol production.
CHEMICAL ENGINEERING JOURNAL
(2021)
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.