Article
Energy & Fuels
Xin Wang, Junkai Chong, Shuoyang Liang, Min Guo, Mei Zhang
Summary: Sorbents of Mn doped CuO loading on alumina particles were successfully synthesized by hydrothermal method for capturing H2S at low-temperature in a dry and anaerobic environment. The effects of calcination temperature and Cu/Mn molar ratio on the desulfurization performance were investigated. The prepared sorbent showed improved breakthrough H2S capacity and CuO active component utilization.
Article
Chemistry, Multidisciplinary
Ju Wang, Jie Xu, Xianli Wu, Bin Liang, Chunhua Du
Summary: The kinetics of high-temperature H2S removal using Mn/Al sorbents prepared by co-precipitation method were investigated. The sorbents showed higher reactivity and lower diffusion resistance compared to pure Mn2O3. The deactivation model accurately predicted the H2S breakthrough curves during sulfidation-regeneration process.
Article
Engineering, Chemical
Wenyang Zhao, Balasubramanian Veerappan Vaithilingam, Supriya Ghosh, Xinyu Li, Frank Geuzebroek, Adel Saif El Nasr, Ibrahim Khan, Satyadileep Dara, Nitish Mittal, Prodromos Daoutidis, Saleh Al Hashimi, K. Andre Mkhoyan, Yasser Al Wahedi, Michael Tsapatsis, Andreas Stein
Summary: A new sorption-based process is proposed for the separation of H2S from natural gas, biogas, and coal gas, which can be coupled with the Claus desulfurization process to reduce sulfur emissions. This process uses a new sorbent material with high sulfur capacity and superior performance in the Claus process, consisting of Cu, Mg, and Al oxides.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Qiongdan Zhang, Chengcheng Zheng, Ke Zhang, Yong Zheng, Yihong Xiao, Lilong Jiang
Summary: A novel catalyst structure comprising Ce-Mn solid solution and amorphous CeO2 (50Ce-Mn) was synthesized, which exhibited high catalytic activity, stability, and sulfur selectivity. The high specific surface area of 50Ce-Mn facilitated reactant access and sulfur desorption, while the strong Ce-Mn interaction and abundant surface-active oxygen species contributed to the regeneration of active sites and inhibited sulfate accumulation.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Qiongdan Zhang, Chengcheng Zheng, Ke Zhang, Yong Zheng, Yihong Xiao, Lilong Jiang
Summary: Efficient and stable nanocatalysts are crucial for catalytic removal of H2S. In this study, cerium-manganese (Ce-Mn) nanocomposite oxides were constructed with tunable phase structure and unique surface properties. The tailored catalyst 50Ce-Mn exhibited high specific surface area and strong Ce-Mn interaction, leading to superior catalytic activity and stability for sulfur selectivity.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Chemical
Wenyang Zhao, Michael Manno, Yasser Al Wahedi, Michael Tsapatsis, Andreas Stein
Summary: This study developed a method to prepare sorbent pellets with high sulfur capacity and good regenerability for the removal of dilute H2S from Claus process tail gas. The optimized sorbent pellets showed a stable breakthrough sulfur capacity over three cycles of sulfidation and regeneration, with an average radial crush strength of 154 +/- 40 N.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Environmental
Pengbo Hu, Shujuan Wang, Yuqun Zhuo
Summary: The study focused on enhancing the arsenic adsorption strength of γ-Al2O3 by modifying it with manganese, which was confirmed through molecular dynamics simulations and density functional theory calculations. The experimental results supported the theoretical analyses, showing that manganese-modified γ-Al2O3 has higher arsenic adsorption capacity than pure γ-Al2O3. This research provides critical references for efficiently capturing arsenic in coal-fired power plants using manganese-modified γ-Al2O3.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Haifeng Li, Tao Liu, Sheng Su, Mei Jin, Wen Fang, Lijun Liu, Yi Wang, Song Hu, Jun Xiang
Summary: Ce modification can enhance the pre-breakthrough H2S removal efficiency of sorbents during desulfurization-regeneration cycles, but the loading sequence of Ce affects the breakthrough sulfur capacity durability of the sorbents.
Article
Chemistry, Physical
Jiawei Hu, Hilde Poelman, Stavros-Alexandros Theofanidis, Jonas J. Joos, Christophe Detavernier, Dirk Poelman, Wei Wei, Vladimir V. Galvita
Summary: CCLHGD is a new hot gas desulfurization method that utilizes alternating sulfuration and regeneration processes to remove H2S. Fe2O3 is gradually converted into iron sulfides by H2S, and it can be fully regenerated to iron oxides by CO2. This work provides an efficient chemical looping scheme for H2S removal and offers new opportunities for hot gas desulfurization.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Lu Dong, Hai Wang, Yaji Huang, Hao Chen, Haoqiang Cheng, Lingqin Liu, Ligang Xu, Jianrui Zha, Mengzhu Yu, Sheng Wang, Yufeng Duan
Summary: Magnetic manganese-iron modified attapulgite sorbents were synthesized and shown to have optimal Hg-0 removal activity in coal-fired flue gas under certain conditions, which could potentially reduce costs and maximize the utilization of green energy sources.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Susanna Nilsson, Alicia Ronda, Alberto Gomez-Barea
Summary: The use of alkaline residue from the acetylene industry as in-bed sorbent to remove H2S from syngas was investigated. The reaction rate was affected by the presence of CO2 and H2O in the gas mixture. The sulfidation rate of calcined CS was influenced by operating parameters and showed promising potential as an alternative to conventional sorbents.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Yuejiao Jiao, Song Han, Weidong Zhang, Min Guo, Fangqin Cheng, Mei Zhang
Summary: The adsorbents self-assembled using CuO-loaded hollow microspheres exhibited high adsorption capacity for H2S in biogas, with a regeneration rate suitable for removal at room temperature under dry atmosphere.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Engineering, Chemical
Xinyu Wu, Yufeng Duan, Jialin Meng, Xinze Geng, Ao Shen, Jiwei Hu
Summary: A sulfur-loaded Fe2O3 adsorbent for mercury removal was developed by H2S modification, showing good performance in mercury removal. The active sulfur sites enhanced the chemical bonding with Hg-0 and promoted the oxidation of Hg-0 to HgS during the mercury adsorption process.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Chemical
Yeawan Lee, Jin-Ho Sung, Bangwoo Han, Yong-Jin Kim, Hak-Joon Kim
Summary: To control NOx emissions in semiconductor production, a wet scrubber was modified by injecting O-3 and adding oxidants, reducing agents, and pH adjusters. A novel wet scrubber design effectively reduced the consumption of Na2S and NaOH, with Na2S performing better as a reducing agent. The consumption rate of chemicals was reduced by mixing Na2SO3 and Na2S2O3.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Shaoju Jian, Yiting Cheng, Xiaofan Ma, Hongtao Guo, Jiapeng Hu, Kaiyin Zhang, Shaohua Jiang, Weisen Yang, Gaigai Duan
Summary: La-Mn bimetal oxide nanofibers synthesized by electrospinning and heat treatment demonstrated excellent performance in fluoride removal, with an equilibrium time of approximately 90 minutes and a maximum F- uptake of 189.39 mg g(-1) according to the Langmuir model.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Environmental Sciences
Yuxing Tong, Qunshan Yan, Song Gao, Bin Xiong, Xiangbing Tang, Zhichang Liu, Pengfei Li, Ming Huang, Ziwei Wang, Xi Le, Wei Pei, Zejun Dai, Zhe Xiong, Yi Wang
Summary: The KMnO4 modification was shown to effectively enhance the Ni2+ adsorption capacity of biomass by introducing carboxylates and MnO2. Additionally, cross-linked structures between lignin and other components in biomass were found to inhibit the adsorption capacity of PPCB.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Thermodynamics
Meng Zhu, Jing Zhou, Lei Chen, Sheng Su, Song Hu, Haoran Qing, Aishu Li, Yi Wang, Wenqi Zhong, Jun Xiang
Summary: This study utilized a global optimization model to analyze the optimal design of SCDC boilers, finding that boiler cost decreases and then increases with the increase of thermal power due to the influence of heat transfer and material. The proposal of double/multiple boiler design and positive matching principle can ensure the cost is in the optimal range.
Article
Chemistry, Applied
Zhe Xiong, Yimin Xiong, Qiaoling Li, Hengda Han, Wei Deng, Jun Xu, Long Jiang, Sheng Su, Song Hu, Yi Wang, Jun Xiang
Summary: The study found that vapor-/solid-phase interactions significantly affect the formation of heavy components in biomass pyrolysis, while solid-phase interactions facilitate the conversion of oxygen-containing structures of HCO into char.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Engineering, Chemical
Yijian Sheng, He Liu, Limo He, Jun Xiang
Summary: The performance of a rotary cup burner assembly with three different cooking stoves was investigated in this study. Simulation and evaluation based on five factors were conducted to assess the performance of the burner system. The results showed that the rotary cup burner performed well when used with two staple food stoves and one subsidiary food stove, with stove A having the best overall adaptability performance.
Article
Thermodynamics
Yi-Feng Chen, Sheng Su, Tao Liu, Ya-Wei Song, Xin Wang, Meng-Xia Qing, Yi Wang, Song Hu, Zhong-Xiao Zhang, Jun Xiang
Summary: This study used quantum chemistry calculations to reveal the microscopic mechanism of NO heterogeneous reduction on a char surface. The results showed that during the chemisorption process, the char donated electrons to NO and there were two secondary chemisorption stages resulting in the formation of N2 and N2O. The chemisorption of the second NO was determined as the rate-limiting step for NO reduction. The migration of oxygen atoms favored NO reduction, leading to a preferred pathway for N2 formation over N2O.
Article
Thermodynamics
Wei Deng, Xuepeng Wang, Syed Shatir A. Syed-Hassan, Chun Ho Lam, Xun Hu, Zhe Xiong, Hengda Han, Jun Xu, Long Jiang, Sheng Su, Song Hu, Yi Wang, Jun Xiang
Summary: The electrochemical method shows promise in achieving the objective of bio-oil upgrading at room temperature, but coke formation remains a challenge due to the polymerization nature of bio-oil. This study investigates the interactions between aromatic-rich and aromatic-poor fractions of bio-oil and their effects on polymerization. The results indicate that these interactions can decrease coke yield, increase the surface area and pore volume of coke, and induce more types of reactions, resulting in less coke formation.
Article
Energy & Fuels
Hengda Han, Long Jiang, Kuan Du, Changyi Liu, Liangcai Liu, Zhe Xiong, Song Hu, Yi Wang, Sheng Su, Jun Xiang
Summary: The study reveals the effects of KCl on the polymerization of heavy components during steam reforming process. Heavy components are formed mainly through polymerization reactions accompanied by dehydration and decarboxylation.
Article
Thermodynamics
Baihe Guo, Jingchao Zhang, Yanlin Wang, Xiaolei Qiao, Jun Xiang, Yan Jin
Summary: The use of fly ash to prepare aerogel support for CO2 adsorption was studied. The results showed that the aerogel support made from fly ash had good microscopic properties and achieved high adsorption capacity under certain conditions.
Review
Energy & Fuels
Xin Wang, Jun Xu, Peng Ling, Xiaoxue An, Hengda Han, Yifeng Chen, Long Jiang, Yi Wang, Sheng Su, Song Hu, Jun Xiang
Summary: This study investigated the characteristics of sewage sludge and coal slime combustion, finding that co-combustion had a positive effect on desulfurization. Proper blend ratios and temperatures could effectively suppress the emission of SO2. The evolution of S functional groups showed different patterns during co-combustion. Calcium played an important role in the process, reacting with SO2 to form intermediate solid products and retaining SO2 in the ash.
Article
Energy & Fuels
Abdulmajid Abdullahi Shagali, Song Hu, Hanjian Li, Huanying Chi, Haoran Qing, Jun Xu, Long Jiang, Yi Wang, Sheng Su, Jun Xiang
Summary: The heating rate has a significant impact on the pyrolysis process, especially for reactions involving the co-pyrolysis of biomass and plastic. The synergistic effects of the blend samples are concentrated in the main decomposition region, and the co-pyrolysis process requires less activation energy compared to the pyrolysis of plastic alone.
Article
Thermodynamics
Jing Zhou, Meng Zhu, Lei Chen, Qiangqiang Ren, Sheng Su, Song Hu, Yi Wang, Jun Xiang
Summary: This study aims to construct the performance analysis and system optimization methods of supercritical CO2 (S-CO2) coal-fired CHP plants with MEA-based post-combustion carbon capture and storage (CCS) that has adapted for various S-CO2 CHP cycles. Results show that exergy efficiency of S-CO2 DPR coal-fired CHP units at 0% and 100% heating loads (HL) are 43.22% and 46.21%, increasing by 9.81% and 1.01% compared with S-CO2 recompression CHP units, respectively.
Article
Chemistry, Physical
Kuan Du, Beichen Yu, Yimin Xiong, Long Jiang, Jun Xu, Yi Wang, Sheng Su, Song Hu, Jun Xiang
Summary: Bio-oil emulsions were stabilized using solid emulsifiers such as coconut shell coke, modified amphiphilic graphene oxide, and hydrophobic nano-fumed silica. The stability of the emulsions was influenced by the particles used. The emulsion stabilized by Ni/SiO2 showed potential for catalytic hydrodeoxygenation of bio-oil, inhibiting the polymerization reaction and promoting the conversion of phenolic compounds.
Article
Engineering, Chemical
Jialin Zhang, Song Hu, Yong Ding, Rui Huang, Qiangqiang Ren, Sheng Su, Yi Wang, Long Jiang, Jun Xu, Jun Xiang
Summary: In this study, a hydrothermal-carbonization method was utilized to process waste biomass, resulting in the production of high-value carbon aerogels. The banana peel-based carbon aerogel showed the best performance in ethanol cracking, achieving a hydrogen yield of 41.86%. The enhanced ethanol cracking was attributed to the abundant pores in the carbon aerogel, which extended the residence time, and the presence of inorganic components (such as Ca, Mg, and K) on the surface of the aerogel, which promoted bond-breaking and reorganization in ethanol.
Review
Engineering, Chemical
Chong Tao, Limo He, Xuechen Zhou, Hanjian Li, Qiangqiang Ren, Hengda Han, Song Hu, Sheng Su, Yi Wang, Jun Xiang
Summary: This review discusses the characteristics and removal methods of volatile organic compounds (VOCs) in cooking oil fumes. The emission characteristics are influenced by cooking temperatures, cooking oils, and cuisines. Various purification methods, such as physical capture, chemical decomposition, and combination methods, are compared based on VOC removal rate, operability, secondary pollution, application area, and cost. The catalytic combustion method, particularly with noble metal and non-noble metal catalysts, shows high efficiency, environmental friendliness, and low cost.
Article
Engineering, Environmental
Mengxia Qing, Linlin Zhang, Liang Liu, Yaxin Chen, Yunda Su, Sheng Su, Song Hu, Yi Wang, Jun Xiang
Summary: SiO2 doping improves the de-NOx activity of MnCe/Ti catalysts at high temperatures and enhances their sulfur resistance at wide temperatures.
CHEMICAL ENGINEERING JOURNAL
(2023)
