Article
Chemistry, Physical
Mengli Zhou, Yang Xu, Guangqian Luo, Qingzhu Zhang, Lin Du, Zehua Li
Summary: This study prepared Ce-Fe binary oxide modified bentonite for mercury removal from flue gas. The modified bentonite showed better removal performance and the removal mechanism was revealed. Furthermore, the deactivated modified bentonite can be effectively regenerated after thermal treatment.
APPLIED SURFACE SCIENCE
(2022)
Article
Energy & Fuels
Mei An, Nini Yuan, Qingjie Guo, Xianyong Wei
Summary: This study investigated the effect of CuFe2O4 on the removal of Hg0 in coal gasification using experimental and thermodynamic techniques. The results showed that CuFe2O4-modified bentonite had better adsorption capacities for Hg0 and could convert more Hg0 into Hg2+ and particulate mercury. The thermodynamic simulation and DFT results further confirmed the favorable conversion of Hg0 with CuFe2O4-modified bentonite.
Article
Energy & Fuels
Zijian Zhou, Lei Liu, Xiaowei Liu, Yue Zhou, Changqing Wang, Jingying Xu, Guozhang Chang, Minghou Xu
Summary: MnOx-based oxides are efficient catalysts for elemental mercury oxidation in flue gas, and combining with CeO2 or CeO2-ZrO2 enhances their catalytic activity. The new MnOx-CeO2-ZrO2 solid solution catalyst showed better Hg-0 oxidation performance compared to the MnOx/CeO2-ZrO2 supported catalyst. Mn4+ and surface active oxygen were identified as the active species in Hg-0 oxidation reactions, and SO2 significantly inhibited the activity of MnOx/CeO2-ZrO2 but had less impact on MnOx-CeO2-ZrO2 solid solution.
Article
Energy & Fuels
Kening Yao, Xiao Zhang, Boxiong Shen, Qiqi Shi, Shuhao Li, Feng Shen
Summary: This study aims to design an efficient adsorbent for high-efficiency removal of elemental mercury (Hg0) from coal-fired power plant emissions. By co-implanting porous TiO2 with inorganic-organic dual functional sites (-SH and MnOx), the 2SH-MnOx/TiO2 adsorbent achieved a Hg0 removal efficiency of 90% at 175 degrees C and a high gas hourly space velocity (GHSV) of 120,000 h-1. The co-existence of -SH and MnOx was found to promote Hg0 adsorption and enhance the transfer of electrons from Hg0 to the adsorbent surface.
Article
Chemistry, Physical
Yong Fu, Chengyue Yang, Yutong Zheng, Jinwen Jiang, Yu Sun, Feng Chen, Jianshe Hu
Summary: The study utilized sulfur to prepare a polysulfide complex material for capturing Hg(II) and converting the Hg(II)-containing spent adsorbent into a catalyst. Characterization results demonstrated that the composite material exhibited good adsorption and regeneration performance, as well as excellent selectivity and catalytic activity.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Energy & Fuels
Wenjun Huang, Chenxi Zong, Zhisong Liu, Qinyuan Hong, Leipeng Ji, Haomiao Xu, Zan Qu, Naiqiang Yan
Summary: This paper investigates the removal of gaseous elemental mercury (Hg0) from industrial flue gas using Mn-based oxides modified SAPO-34 molecular sieve. The results show that deposition of 5% Mn on the surface of SAPO-34 enhances Hg0 removal efficiency, especially at lower temperatures. The surface MnOx particles enhance the oxidation of Hg0 and facilitate its adsorption.
Article
Biochemistry & Molecular Biology
Xiaocheng Wang, Xiaojun Hou, Peiyu Zou, Aimin Huang, Min Zhang, Lin Ma
Summary: This study investigates the controlled release efficacy of nanocomposites based on alginate and bentonite. It was found that (3-chloro-2hydroxypropyl)trimethyl ammonium grafted starch can enhance the swelling property and adsorption capability of the nanocomposites, resulting in a slower release of alachlor.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Energy & Fuels
Xiao Zhang, Kai Ren, Yuting Wang, Boxiong Shen, Feng Shen, Yewen Shang
Summary: The study synthesized biochar with incorporated Mn-Fe oxide composite through mechanochemical synthesis, showing high efficiency in purifying Hg-0 and VOC in coal-fired flue gas.
Article
Chemistry, Applied
Li Wang, Suping Zhu, Yong Chen, Pothiyappan Karthik, Jianshe Chen
Summary: Reducing fat content in food while maintaining sensory qualities is a challenge for the food industry. This study explores the feasibility of using debranched and OSA esterified resistant starch as an emulsifier to protect fat droplets against enzymatic digestion. The modified starch showed increased resistant starch content but decreased degree of substitution. The resulting emulsifier had weaker emulsifying capacity and reduced stability under certain conditions, but it provides insights into the utilization of resistant starch emulsifiers in reduced fat food formulations.
FOOD HYDROCOLLOIDS
(2023)
Article
Energy & Fuels
Rihong Xiao, Tian Gao, Xiangzheng Cui, Yushan Ji, Yili Zhang, Xing Chuai, Zhuo Xiong, Yongjin Liao, Hongbai Gu, Jianping Yang, Junying Zhang, Yongchun Zhao
Summary: CuCl2-MF is a cost-efficient and highly efficient sorbent for Hg removal from flue gas in coal-fired units, exhibiting high removal efficiency and recovery rate in large-scale coal-fired power plants. The optimal magnetosphere particle size of 45 μm-75 μm showed the highest mercury removal capacity, while CuCl2-MF also demonstrated good removal efficiency for low concentrations of mercury.
Article
Environmental Sciences
M. Devasena, I. M. Nambi
Summary: The study found that sodium polysulphide solution can stabilize elemental mercury into mercury sulphide, and showed that mercury sulphide is more stable under mild alkaline pH conditions, making it suitable for permanent storage of mercury underground.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Weiwei Shan, Bo Zhao, Linbo Qin, Yiming Wang, Qiang Zhang, Wangsheng Chen, Jun Han
Summary: In this study, iron-modified manganese oxide octahedral molecular sieve (Fex-OMS-2) was prepared through hydrothermal synthesis method to improve the sulfur resistance of OMS-2 for Hg0 oxidation. The Hg0 removal efficiency of Fe0.05-OMS-2 reached 98% at 150 degrees C. Even in the presence of 1500 ppm SO2, its mercury removal efficiency remained at 89.2%, while OMS-2 only achieved 54% under the same condition. Characterization results showed that Fe0.05-OMS-2 had a spinel structure with Fe2O3 wrapped on the catalyst surface.
Article
Energy & Fuels
Dongjing Liu, Lingtao Yang, Bin Li, Jiang Wu
Summary: Porous silica derived from rice husk exhibits good Hg-0 adsorption capability in the temperature range of 60-140 degrees C, with Hg-0 removal efficiency above 80%; the mercury removal performance of RHS can be significantly enhanced by KBr modification.
JOURNAL OF THE ENERGY INSTITUTE
(2021)
Article
Energy & Fuels
Lingyan Le, Hui Wang, Qingshan Zeng, Kang Yang, Yiwen Zhang, Hengyuan Ran, Dong Liu
Summary: This study proposes using acid-chlorine-modified rice straw coke as an adsorbent for the removal of mercury pollution from coal-fired power plants. The modification increases surface pore structure and oxygen-containing functional groups, enhancing the adsorbent's mercury removal capacity. The optimal effect is achieved at an acid-chlorine ratio and mass ratio of 1:2, and the reaction temperature and inlet mercury concentration significantly impact mercury removal efficiency. The adsorption process is primarily controlled by surface mass transfer and chemisorption, with Cl and O atoms playing important roles in facilitating mercury removal.
Article
Engineering, Environmental
Yongpeng Ma, Tengfei Xu, Xiaojing Zhang, Jiandong Wang, Haomiao Xu, Wenjun Huang, Hongzhong Zhang
Summary: Adsorption is an effective method for removing and recycling high concentration of mercury from nonferrous metal smelting flue gas, especially with adsorbents like Mn/ITQ-2 zeolite which have large specific surface area and good Hg-0 removal efficiency. The study also found that Co-Mn/ITQ-2 zeolites exhibit high SO2 resistance performance and excellent regenerability, making them a promising option for mercury recycling from flue gas.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Applied
Lidan Deng, Qiao Chen, Xingmao Jiang, Xiaowei Liu, Zheng Wang
Summary: In this study, it was found that the catalytic performance of Pt/SBA-15 can be significantly improved by introducing an appropriate amount of indium. Among all catalysts tested, 1Pt1In/SBA-15 exhibited the highest initial propane conversion rate (57.06%) and selectivity towards propylene (99.04%). The catalytic activity decreased slightly after 28 hours of reaction, but the selectivity remained high at over 99%.
Article
Materials Science, Ceramics
Lei Liu, Zijian Zhou, Xiangkun Elvis Cao, Yue Zhou, Dejun Peng, Ying Liu, Xiaowei Liu, Minghou Xu
Summary: Many dopants have been explored to improve the heat storage performance and sintering resistance of Co3O4, but the performance of these materials is not comparable due to different synthesis methods and test conditions. This study systematically compared and screened nine dopants, including four unreported ones, under the same conditions. The results showed that Cu and Zr doping had the highest re-oxidation rate, while Si and Mg doping had adverse effects on the conversion rate. Cu-doped sample exhibited higher re-oxidation rate and energy density, while Zr-doped sample exhibited more stable cyclability.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Lidan Deng, Xiaowei Liu, Zaikun Wu, Jie Xu, Zijian Zhou, Minghou Xu
Summary: In this study, the conventional sequential impregnation synthetic method for preparing Pt-Sn/SiO2 catalysts for propane dehydrogenation was improved. Different synthesis procedures were examined and the results showed that the direct reduction method produced Pt3Sn alloy nanoparticle and displayed the best catalytic performances. These findings demonstrated the importance of suitable catalyst preparation procedures to enhance the catalytic activities of Pt-Sn/SiO2 catalysts.
Article
Thermodynamics
Le Lei, Xiaowei Liu, Huakun Wang, Yue Zou, Yishu Xu, Minghou Xu
Summary: In this study, a solar-aided coal-fired power generation (SACPG) system is proposed to combine solar energy with traditional coal-fired power stations in order to solve the issues of massive coal consumption and pollution discharge. The research shows that using solar energy to heat the feedwater recycle system can achieve the highest total thermal efficiency and boiler thermal efficiency, thus saving coal and water resources.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Engineering, Environmental
Yue Zou, Xiaowei Liu, Kui Wu, Yunfei Zhai, Yuyang Li
Summary: This study investigates the impact of sulphur and chlorine on the formation of condensable particulate matter (CPM) during coal combustion. The addition of SO2 increases the CPM content, while the presence of chlorine decreases the sulphur content in CPM. These findings are significant for understanding the generation mechanism of CPM.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Physical
Lidan Deng, Zheng Wang, Xingmao Jiang, Jie Xu, Zijian Zhou, Xiaozhong Li, Zhixiong You, Mingyue Ding, Tetsuya Shishido, Xiaowei Liu, Minghou Xu
Summary: This study demonstrates an efficient method for the synthesis of formaldehyde from CO2 through water catalysis, achieving high conversion and yield even at room temperature and ambient pressure. HCOOH is identified as an important reaction intermediate, and the presence of surface -OH groups in LDH and the hybrid electronic state of Ru catalyst contribute to the highly efficient formation of formaldehyde.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Thermodynamics
Xin-Yuan Tang, Wei-Wei Yang, Xu Ma, Xiangkun Elvis Cao
Summary: This study proposes an integrated membrane reactor modeling method based on thermodynamic equilibrium to investigate the enhancement potential of membrane reactors. The modeling method applies MATLAB codes to calculate local reaction equilibrium and determine product separation. Through parametric analysis and optimization by GA and NSGA-II, it is found that pressure-driven hydrogen recovery enhancement is the key to improving membrane reactor performance. The results provide reference conditions for theoretical reactor design.
Article
Chemistry, Physical
Yong-Jian Yang, Wei-Wei Yang, Xu Ma, Xin-Yuan Tang, Xiangkun Elvis Cao
Summary: In order to counteract the effects of solar radiation fluctuation, phase change material (PCM) was employed in the solar volumetric reactor. A new design, SVR2, was proposed to address issues of high temperature, slow charging-discharging rate, and fluctuating methane conversion. Simulation results showed that SVR2 achieved a lower maximum temperature and higher methane conversion rate compared to the conventional SVR1 under natural solar radiation fluctuation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Mechanics
Zheming Tong, Zhongqin Yang, Shuiguang Tong, Zekui Shu, Xiangkun Elvis Cao
Summary: An enstrophy dissipation-based hybrid optimization (EDHO) approach, combining the advantages of sparrow search algorithm and Non-dominated Sorting Genetic Algorithm III (NSGA-III), was proposed to enlarge the Preferred Operating Range (POR) of a slanted axial flow pump (SAFP). The overall hydraulic performance was optimized with a special focus on energy loss mechanism. The results showed that eddy dissipation contributed the most energy loss under partial loads, while shear dissipation also played a significant role under overload conditions.
Article
Chemistry, Physical
Yue Zhou, Zijian Zhou, Jian Sun, Lei Liu, Fei Luo, Guorong Xu, Xiangkun Elvis Cao, Minghou Xu
Summary: This study examines the thermochemical energy storage properties of Sr3Fe2O7-delta and SrFeO3-delta, and finds that Sr3Fe2O7-delta exhibits higher reduction reaction and absorption performance, making it a better candidate for energy storage.
Article
Chemistry, Applied
Jianbin Luo, Xinbo Zhu, Hanpeng Wu, Zijian Zhou, Geng Chen, Guohua Yang
Summary: The oxidation of soot particles over M-V/ZSM-5 catalysts (M=Mn, Co and Fe) was investigated in a cylindrical DBD plasma reactor. Soot particles were completely eliminated after 60 minutes of reaction in the plasma reactor. Mn-V/ZSM-5 catalyst exhibited higher catalytic activity towards soot particles compared to the Co-V/ZSM-5, Fe-V/ZSM-5, and VOx/ZSM-5 catalysts in the plasma reactor. However, the CO2 selectivity showed an opposite trend to the soot oxidation rate.
Article
Energy & Fuels
Zijian Zhou, Lei Liu, Qi Guo, Xinbo Zhu, Xiaowei Liu, Minghou Xu
Summary: Co-based oxides are promising for thermochemical energy storage due to their long-term stability. This study investigates the influence of Zr doping on the charging rate of Co-based oxides and explores the mechanism behind the enhancement effects.
Article
Chemistry, Applied
Jie Xu, Xiaowei Liu, Rui Li, Boxiong Shen, Zijian Zhou, Lidan Deng, Lei Liu, Xinbo Zhu
Summary: Converting CO2 into renewable fuel via photocatalysis is important for addressing the energy crisis and climate change. A p-n heterojunction between Cr doped MgAl-LDH and Co3O4 was constructed for visible-light-driven fuel production. The optimal Co3O4/LDH heterojunction exhibited high CO evolution rate and selectivity, facilitated by enhanced light absorption and reverse migration of electrons and holes. This study investigates and verifies the designed type-II heterojunction based on MgAl-LDH, providing guidance for the design of heterojunction catalysts and promoting practical application in the photocatalytic field.
FUEL PROCESSING TECHNOLOGY
(2023)
Correction
Chemistry, Applied
Jia Liu, Juntong Dong, Xiaodan Li, Teng Xu, Zhenguo Li, Jeffrey Dankwa Ampah, Mubasher Ikram, Shihai Zhang, Chao Jin, Zhenlong Geng, Tianyun Sun, Haifeng Liu
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Seba Alareeqi, Daniel Bahamon, Kyriaki Polychronopoulou, Lourdes F. Vega
Summary: This study explores the potential application of single-atom-alloy (SAA) catalysts in bio-oils hydrodeoxygenation refining using density functional theory (DFT) and microkinetic modeling. It establishes the relationships between stability, adsorptive properties, and activity structures for bio-oil derivatives, providing guidance for the synthesis of cost-effective SAA combinations.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Bin Hu, Wen -Ming Zhang, Xue-Wen Guo, Ji Liu, Xiao Yang, Qiang Lu
Summary: This study explored the pyrolysis behaviors and mechanisms of different monosaccharides, including arabinose, galactose, galacturonic acid, and glucuronic acid. The roles of structural differences in these monosaccharides were analyzed, and it was found that glucuronic acid undergoes a special C-C bond breaking reaction during pyrolysis. The findings provide a deep understanding of the pyrolysis chemistry of hemicellulose and the role of different branches.
FUEL PROCESSING TECHNOLOGY
(2024)
Review
Chemistry, Applied
Youwei Zhi, Donghai Xu, Guanyu Jiang, Wanpeng Yang, Zhilin Chen, Peigao Duan, Jie Zhang
Summary: Hydrothermal carbonization (HTC) is an effective method for the harmless disposal of municipal sludge (MS) and offers potential applications for the obtained products. Optimizing reaction conditions, coupling with other waste materials, and combining different processes can improve the performance of HTC. Furthermore, HTC contributes to energy recovery and enhances the quality of life cycle assessment.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Jia Wang, Jianchun Jiang, Dongxian Li, Xianzhi Meng, Arthur J. Ragauskas
Summary: This study presents a scalable process for converting holocellulose and cellulosic wastes into advanced oxygen-containing biofuels with high furan, cyclic ketone, and ethanol content. By combining hydropyrolysis and vapor-phase hydrodeoxygenation using Pd/Al2O3 as a catalyst, the researchers achieved high yields and conversions. The integrated process holds great promise for biomass waste conversion into advanced biofuels.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Florian Held, Jannis Reusch, Steffen Salenbauch, Christian Hasse
Summary: The accurate prediction and assessment of soot emissions in internal combustion engines are crucial for the development of sustainable powertrains. This study presents a detailed quadrature-based method of moments (QMOM) soot model coupled with a state-of-the-art flow solver for the simulation of gasoline engines. The model accurately describes the entire cause-and-effect chain of soot formation, growth and oxidation. Experimental validation and engine cycle simulations are used to identify the root cause of observed soot formation hotspots.
FUEL PROCESSING TECHNOLOGY
(2024)
