Article
Materials Science, Multidisciplinary
Bo-Lin Zhang, Li-Feng Deng, Bo Liu, Chun-Yun Luo, Michael Liebau, Shen-Gen Zhang, Roger Glaeser
Summary: Combining the redox properties of Co and the acid properties of Nb in a Co-3-Nb-O-x catalyst results in superior performance in NH3-selective catalytic reduction of NO. This synergistic effect enhances activity and N2 selectivity.
Article
Chemistry, Physical
Tae Hun Kang, Hyun Sub Kim, Hwangho Lee, Do Heui Kim
Summary: V2O5-WO3/TiO2 + H-ZSM-5 (PM), a physical mixture of V2O5-WO3/TiO2 catalyst and H-ZSM-5 zeolite, was prepared for NH3 reduction of NOx. The PM catalyst showed similar deNOx efficiency to V2O5-WO3/TiO2 catalyst in NH3 reduction of NO, but exhibited higher catalytic activities in NH3 reduction of NO2 due to increased NO2 and N2O4 adsorption. Moreover, the PM catalyst produced less N2O than H-ZSM-5 catalyst and exhibited higher SO2 tolerance. This study demonstrates the practical importance of PM catalyst with its high deNOx efficiency, low N2O production, and high SO2 resistance for the SCR of either NO or NO2.
APPLIED SURFACE SCIENCE
(2023)
Article
Environmental Sciences
Yuxi Bi, Encheng Sun, Shuai Zhang, Feiran Du, Haidi Wei, Fang Liu, Chaocheng Zhao
Summary: The study focused on modifying activated carbon fibers with different metal salts and loading TiO2 for the removal of toluene. Among the modified samples, TiO2/ACF-(Ac) modified by Zn(CH3COO)(2) showed the best performance in toluene degradation. Characterization results indicated rough surfaces with TiO2 mainly loaded on areas containing oxygen-containing functional groups. The modified ACFs significantly improved charge transmission and the efficiency of electron-hole separation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Jae-Rang Youn, Min-Jae Kim, Seung-Jae Lee, In-Soo Ryu, Soon Kwan Jeong, Kyubock Lee, Sang Goo Jeon
Summary: CNTs as promoter added to VCT catalyst can enhance catalytic efficiency in NH3-SCR reaction, significantly influencing the crystal structure formation of metal oxides.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Lidai Zhou, Min Zhang, Caixia Liu, Huijun Wang, Yan Zhang, Yuchao Zang, Ziyin Zhang, Rui Han, Na Ji, Chunfeng Song, Xuebin Lu, Weichao Wang, Qingling Liu
Summary: CeSnOx catalysts exhibit excellent N2 selectivity at high temperatures, and doping Sn can reduce the formation energy of oxygen vacancies in CeSnOx catalysts, making it easier to adsorb and stabilize oxygen as active sites. In addition, Sn doping successfully inhibits the competitive adsorption of OH and NH3 on the Ce site and improves the selectivity of NH3.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Applied
Kyung-yo Park, Bora Ye, Myeung-jin Lee, Geumyeon Lee, Bora Jeong, Donghyuk Kim, Jae-il Jung, Han-gyu Im, Heesoo Lee, Hong-Dae Kim
Summary: Selective catalytic oxidation (SCO) is an effective method to reduce CO and NH3 emissions. In this study, WS2 was added to Pt/TiO2 catalyst to synthesize a catalyst that is not easily poisoned by SO2 and shows improved oxidation performance.
Article
Chemistry, Multidisciplinary
Min Seong Lee, Sun- Kim, Bora Jeong, Jin-Woo Park, Taehyo Kim, Jung Woo Lee, Gibum Kwon, Duck Hyun Lee
Summary: Research on coating an NH4+ layer on a vanadium-based catalyst can significantly improve its NOX removal efficiency over a wide temperature range, as well as enhance its proton conductivity, reducing the amount of vanadium oxides and tungsten oxide.
Article
Engineering, Chemical
Erez B. Ruck, Oren Ben Porat, Youri Gendel
Summary: A new two-step technique was developed for selectively separating chloride ions from acidic aqueous solutions. The process operates at ambient temperature and pressure, and is powered by H2 gas and atmospheric oxygen. The Pt-Ag-AC catalyst composed of activated carbon loaded with platinum nano size crystals and metallic silver particles, enables the oxidation of Ag0 to Ag+ and the subsequent formation of insoluble AgCl precipitate on the catalyst through the aeration of acidic chloride solution. The regeneration of the Pt-AgCl-AC is achieved through hydrogenation, leading to the reduction of AgCl into Ag0 and the release of Cl- ions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Weilin Zhong, Chao Wang, Hailun Zhao, Suqing Peng, Zhipeng Tian, Riyang Shu, Ying Chen
Summary: In this study, Au nanoparticles loaded on TiO2 nanoflakes were synthesized as efficient photothermal catalysts for bio-derived glycerol photothermal reforming hydrogen production. The study found that the generation of photogenerated carriers is crucial in the photothermal reforming process, and the hot electrons excited by Au nanoparticles promote intermolecular collisions through thermalization. These findings contribute to the understanding of photothermal enhanced reforming and provide insights for the development of renewable energy.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Yue Li, Wenxiang Gao, Jie Deng, Haidi Xu, Yongdong Chen
Summary: The study demonstrated that CuOx and WOx modified CeO2-TiO2 exhibited excellent catalytic activity and resistance to interference for the selective catalytic reduction of NOx, with CuW/CT-NP showing the best activity and the widest temperature window.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
Jihene Arfaoui, Abdelhamid Ghorbel, Carolina Petitto, Gerard Delahay
Summary: A new series of Mn-based catalysts prepared by the sol-gel method show high efficiency in converting NO to N2 at low temperatures. The addition of cerium and/or sulfate can adjust the activity of the catalysts and increase the conversion rate.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Min Seong Lee, Yeong Jun Choi, Su-Jeong Bak, Mingyu Son, Jeehoon Shin, Duck Hyun Lee
Summary: Efficient selective catalytic reduction (SCR) catalysts were prepared using the polyol process, showing high nitrogen oxide (NOx) removal efficiency at low temperatures. The catalysts also had smaller particle size, which increased surface area and catalytic acid sites.
Article
Chemistry, Multidisciplinary
Weiye Qu, Haiyang Yuan, Zhouhong Ren, Jizhen Qi, Dongrun Xu, Junxiao Chen, Liwei Chen, Huagui Yang, Zhen Ma, Xi Liu, Haifeng Wang, Xingfu Tang
Summary: This study presents a solution to maximize effective adsorption and speedy surface reactions in catalysis by designing atom-pair catalytic sites with tunable electronic interactions. The strategy was successfully applied in NO selective reduction reaction, resulting in significantly higher reaction rates.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Energy & Fuels
Bin Peng, Jing Hao, Zhangmin Tian, Qiuchen Xu, Chenxu Ma, Guiying Liu, Yingying Shi, Wenjun Zheng
Summary: This study reports the synthesis of ternary Ni3Mo3N-MoO2-NiO nanoparticles catalyst and its derivatives through pyrolysis method. The catalyst exhibits superior performance in the oxygen evolution reaction, with favorable activity, low overpotential and Tafel slope, as well as excellent stability.
Article
Chemistry, Multidisciplinary
Yanke Yu, Mengqiao Geng, Desheng Wei, Chi He
Summary: Selective catalytic oxidation of NH3 (NH3-SCO) is a promising method to reduce NH3 pollution. The addition of CuSO4 can enhance the N-2 selectivity in the catalyst.
NEW JOURNAL OF CHEMISTRY
(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.