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学者姓名:梁文俊
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Abstract :
Cubic Cu2O micro/nanocrystals were successfully synthesized by liquid-phase reduction using copper salt of CuSO4 or CuCl2.2H2O, and glucose or ascorbic acid as reducing agent, respectively. The activity of the catalysts was evaluated by light-off curves of CO self-sustained catalytic combustion via temperature-programmed oxidation of CO (CO-TPO), with the results showing the activity of catalysts following the order of Cu2O-ClGLU > Cu2O-S-GLU > Cu2O-S-AA > Cu2O-Cl-AA, (Cl denotes CuCl2.2H2O, GLU denotes glucose, S denotes CuSO4 and AA denotes ascorbic acid, respectively), corresponding to the ignition temperature of 109 degrees C, 122 degrees C, 137 degrees C and 186 degrees C, respectively. The crystal structure, elemental valence, morphology and redox property of the prepared catalysts were analyzed by using various characterization techniques. Combined with in situ infrared spectrum, the CO self-sustained catalytic combustion over Cu2O catalysts mainly follows the Mars-van-Krevelen (M-v-K) mechanism: the adsorbed and activated CO reacts with lattice oxygen to yield CO2 and oxygen vacancy, and then the oxygen vacancy can be replenished by gaseous oxygen. Combined with catalytic performance of high-concentration CO, it is found that the catalysts prepared using glucose as reducing agent are more angular compared with ascorbic acid. The Cu2O-Cl-GLU synthesized with glucose and CuCl2.2H2O exhibits the best catalytic activity among all the catalysts tested, attributing to its more obvious edge and rough crystal surface. The unique structure of Cu2O-Cl-GLU leads to the high exposure rate and coordination unsaturation of atoms on the cubic Cu2O micro/nanocrystals that can improve the ability of activating gaseous O2 and low temperature reducibility, and consequently facilitating the catalytic activity.
Keyword :
Nanocrystals Nanocrystals Carbon monoxide Carbon monoxide Chemically adsorbed oxygen Chemically adsorbed oxygen Cu 2 O micro Cu 2 O micro Self-sustained catalytic combustion Self-sustained catalytic combustion
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GB/T 7714 | Ma, Pandong , Zhang, Chenhang , Dou, Baojuan et al. Synthesis of Cu2O micro/nanocrystals for catalytic combustion of high-concentration CO: The crucial role of glucose [J]. | CHEMOSPHERE , 2023 , 314 . |
MLA | Ma, Pandong et al. "Synthesis of Cu2O micro/nanocrystals for catalytic combustion of high-concentration CO: The crucial role of glucose" . | CHEMOSPHERE 314 (2023) . |
APA | Ma, Pandong , Zhang, Chenhang , Dou, Baojuan , Yi, Xiaokun , Bin, Feng , Liang, Wenjun . Synthesis of Cu2O micro/nanocrystals for catalytic combustion of high-concentration CO: The crucial role of glucose . | CHEMOSPHERE , 2023 , 314 . |
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Abstract :
Monolithic catalysts are widely used in industrial catalysis. However, in the preparation of a monolithic catalyst, the traditional methods have some drawbacks such as low washcoat uploading ratio and poor uniformity. In the present work, the effects of Pd/Ce loading and catalyst components on the catalytic abatement of toluene were investigated. The acid treatment of the substrate, the particle size of the slurry and the dispersant on the uniformity of the washcoat and the catalytic performance were also explored. Characterisation was achieved via BET, SEM, zeta potential and laser grain-size analyses. The results showed that the catalytic activity of the catalyst increased with the increasing of the Ce content. It was found that the 0.2Pd-0.3Ce/gamma-Al2O3 catalysts had the best toluene catalytic activity. The pretreatment of the cordierite with 20% HCl could improve the properties of the cordierite. It was also found that reducing the particle size of the washcoat and adding dispersant PAA could effectively improve the stability of the suspension and the uniformity of the washcoat. When 20% HCl pretreatment was used, the toluene catalytic activity of the monolith catalyst prepared by cordierite increased, in which T-10 and T-90 decreased by about 5 degrees C. Decreasing the particle size and dispersant also promoted the efficiency of catalytic degradation.
Keyword :
Pd Pd CeO2 CeO2 monolithic catalyst monolithic catalyst catalytic performance catalytic performance
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GB/T 7714 | Liang, Wenjun , Shi, Xiujuan , Li, Qinglei et al. Effect of Pd/Ce Loading and Catalyst Components on the Catalytic Abatement of Toluene [J]. | CATALYSTS , 2022 , 12 (2) . |
MLA | Liang, Wenjun et al. "Effect of Pd/Ce Loading and Catalyst Components on the Catalytic Abatement of Toluene" . | CATALYSTS 12 . 2 (2022) . |
APA | Liang, Wenjun , Shi, Xiujuan , Li, Qinglei , Ren, Sida , Yin, Guobin . Effect of Pd/Ce Loading and Catalyst Components on the Catalytic Abatement of Toluene . | CATALYSTS , 2022 , 12 (2) . |
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Abstract :
Metal Palladium species are efficiently used to degrade volatile organic compounds (VOCs). In this paper, the adsorption properties of toluene on Pd(111) and PdO(101) surfaces were theoretically studied using the first principle calculation. Adsorption energy, charge density, density of states and electron density difference were chosen as characteristics and were calculated to evaluate the adsorption capacity of toluene on Pd(111) and PdO (101) surfaces. The results showed that the interaction of toluene on the Pd(111) surface was stronger than on the PdO(101) surface. The dissociation pathway of toluene after adsorption was also determined; the results showed that the formation of benzyl radical through the reaction with a hydroxyl group on the Pd(111) and PdO (101) surfaces was investigated using density functional theory calculations. Compared with PdO(101) (0.63 eV), the dissociation of toluene on Pd(111) (0.19 eV) has a lower energy barrier, which indicated that the reaction between toluene and Pd(111) was easier to occur. Therefore, it provides the basis for the preparation of highperformance catalysts and the calculation of catalytic oxidation reaction paths in the future.
Keyword :
Pd(111) Pd(111) PdO(101) PdO(101) First principle calculation First principle calculation Toluene Toluene Dissociation Dissociation Adsorption Adsorption
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GB/T 7714 | Liang, Wenjun , Li, Xiang , Ju, Haolin et al. Adsorption and dissociation mechanism of toluene on Pd (111) and PdO (101) surface: First principle calculation [J]. | SURFACE SCIENCE , 2022 , 720 . |
MLA | Liang, Wenjun et al. "Adsorption and dissociation mechanism of toluene on Pd (111) and PdO (101) surface: First principle calculation" . | SURFACE SCIENCE 720 (2022) . |
APA | Liang, Wenjun , Li, Xiang , Ju, Haolin , Ren, Sida . Adsorption and dissociation mechanism of toluene on Pd (111) and PdO (101) surface: First principle calculation . | SURFACE SCIENCE , 2022 , 720 . |
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Abstract :
In order to reduce process complexity and manufacturing difficulty, we proposed to use a single air distribution plate to guide the flow and achieve uniform air distribution. We established a three-dimensional model with a size ratio of 1:1 to simulation flow pattern. The optimization results revealed that it is feasible to implement our assumption. After the asterisk plate's optimization, the area uniformity index in the catalytic section was maintained above 0.92 with a maximum value of 0.95, the relative standard deviation was lower than 0.2, and the minimum value was 0.123; and the pressure drop was less than 3.00 Pa, which is in line with the actual use requirements. Among them, Asterisk I with a 30 mm thickness and 15 mm right shift has the best optimization effect. (c) 2021 American Society of Civil Engineers.
Keyword :
Deflector Deflector VOC removal system VOC removal system Optimization Optimization CFD modeling CFD modeling
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GB/T 7714 | Liang, Wen-Jun , Ju, Hao-Lin , Ren, Si-da et al. Application of an Asterisk Plate in the Flow Diversion of the Volatile Organic Compound Removal System [J]. | JOURNAL OF ENVIRONMENTAL ENGINEERING , 2021 , 147 (12) . |
MLA | Liang, Wen-Jun et al. "Application of an Asterisk Plate in the Flow Diversion of the Volatile Organic Compound Removal System" . | JOURNAL OF ENVIRONMENTAL ENGINEERING 147 . 12 (2021) . |
APA | Liang, Wen-Jun , Ju, Hao-Lin , Ren, Si-da , Li, Xiang . Application of an Asterisk Plate in the Flow Diversion of the Volatile Organic Compound Removal System . | JOURNAL OF ENVIRONMENTAL ENGINEERING , 2021 , 147 (12) . |
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Abstract :
In order to reduce the dust pollution caused by the coal mining process, a novel composite environmental dust suppressant for coal dust control was synthesized by corn straw, sodium carboxymethyl cellulose (CMC), and additives. This study focused on the preparation conditions of the dust suppressant, and the performances of which were investigated systematically. Response surface method (RSM) was used to optimize the raw material formulation and preparation parameters. The optimum mass ratio of straw, CMC, and alkali of the dust suppression was 65:20:15 (m/m), which was prepared under the conditions of the reaction time being 1.5 h and the rotation speed being 300 r/min. The pH of the dust suppressant was 8.0, and the state of which was suspension. Additives were benefited to enhance the suppressant performance, and the surface tension and the contact angle could decrease to 32.4 mN/m and 32.0 degrees. The suppressant has a maximum viscosity of 363.6 mPa center dot s, and the compressive strength could be up to 200 kPa. The hygroscopic rate could reach more than 4%. The wind erosion resistance could be up to 99 % at the wind speed of 14 m/s. After spraying the dust suppressant, the gap between particles was filled with dust suppressant, and the adjacent particles were bound by strong mechanical action.
Keyword :
Environmental friendly Environmental friendly Dust suppressant Dust suppressant Straw Straw Agricultural waste Agricultural waste
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GB/T 7714 | Liang, Wenjun , Zhang, Zhixue , Chi, Hao et al. Preparation and optimization of the environmental dust suppressant with agricultural waste straw [J]. | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH , 2021 , 29 (7) : 10198-10209 . |
MLA | Liang, Wenjun et al. "Preparation and optimization of the environmental dust suppressant with agricultural waste straw" . | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 29 . 7 (2021) : 10198-10209 . |
APA | Liang, Wenjun , Zhang, Zhixue , Chi, Hao , Ren, Sida . Preparation and optimization of the environmental dust suppressant with agricultural waste straw . | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH , 2021 , 29 (7) , 10198-10209 . |
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Abstract :
Rare earth metals are strategic resources with potential applications in optics, metallurgy and catalysis. In recent years, single-atom site catalysts (SASCs) have attracted increasing attention owing to their 100% atom efficiency and unique catalytic performances. Over the past decade, rare earth elements, including rare earth metals and their oxides, have shown great potential in SASCs. However, systematic analyses of data are still handful. In this mini-review, the use of rare earth metals and their oxides in SASCs was summarized and the results are discussed. A particular focus was paid to the synthetic strategies, characterization of rare earth-containing SASCs, and applications as catalysis supports, promoters and active sites. Current issues faced by rare-earth metals and their oxides in SASCs, as well as future prospects were also provided. (C) 2020 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.
Keyword :
Characterization Characterization Applications Applications Single-atom site catalysis Single-atom site catalysis Rare earth catalysis Rare earth catalysis Synthetic strategies Synthetic strategies
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GB/T 7714 | Zhang, Ningqiang , Yan, Han , Li, Lingcong et al. Use of rare earth elements in single-atom site catalysis: A critical review - Commemorating the 100th anniversary of the birth of Academician Guangxian Xu [J]. | JOURNAL OF RARE EARTHS , 2021 , 39 (3) : 233-242 . |
MLA | Zhang, Ningqiang et al. "Use of rare earth elements in single-atom site catalysis: A critical review - Commemorating the 100th anniversary of the birth of Academician Guangxian Xu" . | JOURNAL OF RARE EARTHS 39 . 3 (2021) : 233-242 . |
APA | Zhang, Ningqiang , Yan, Han , Li, Lingcong , Wu, Rui , Song, Liyun , Zhang, Guizhen et al. Use of rare earth elements in single-atom site catalysis: A critical review - Commemorating the 100th anniversary of the birth of Academician Guangxian Xu . | JOURNAL OF RARE EARTHS , 2021 , 39 (3) , 233-242 . |
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Abstract :
Ru/TiO2 and Ru-Ce/TiO2 catalysts were prepared by the equal-volume impregnation method to test their catalytic oxidation of chlorobenzene(CB), with the aim to investigate the effect of Ce addition on the redox capacity of the catalysts under the premise of reducing the content of noble metals. It was found that the introduction of Ce conserved the high catalytic efficiency of the catalyst while reducing the content of noble metal, and the catalysis of CB was greatly improved at low temperatures. Compared with the 0.4Ru/TiO2 catalyst, the T-10 and T-90 of the 0.4Ru-1.0Ce/TiO2 catalyst decreased by 50 degrees C and 60 degrees C respectively. It presented high reaction rate at 170. with an increase from 1.21 x 10(-8) mol/min.m(2) for the 0.4Ru/TiO2 catalyst to 10.45 x 10(-8) mol/min.m(2), making it even better than the 2.0Ru/TiO2 catalyst. The structure and morphology of the Ru/TiO2 catalyst did not change with the Ce doping and the mesoporous structure of the catalysts was maintained. CeO2 can not only store and release oxygen, but also improve the activity and dispersion of precious metal loaded. The formation of Ru-O-Ce under the interaction between CeO2 and Ru species promoted electron transfer and improved the mobility of surface oxygen, thus forming RuOx with higher valance. The introduction of Ce improved the yield of COx and selectivity towards inorganic chlorine (HCl and Cl-2) and prevented the catalyst from producing more chlorinated by-products, thus greatly reducing the chance of producing more toxic dioxins.
Keyword :
Ruthenium Ruthenium Chlorobenzene Chlorobenzene Ru-Ce/TiO2 Ru-Ce/TiO2 Cerium Cerium Catalytic oxidation Catalytic oxidation
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GB/T 7714 | Liang, Wenjun , Zhu, Yuxue , Ren, Sida et al. Catalytic combustion of chlorobenzene at low temperature over Ru-Ce/TiO2: High activity and high selectivity [J]. | APPLIED CATALYSIS A-GENERAL , 2021 , 623 . |
MLA | Liang, Wenjun et al. "Catalytic combustion of chlorobenzene at low temperature over Ru-Ce/TiO2: High activity and high selectivity" . | APPLIED CATALYSIS A-GENERAL 623 (2021) . |
APA | Liang, Wenjun , Zhu, Yuxue , Ren, Sida , Li, Qinglei , Song, Liyun , Shi, Xiujuan . Catalytic combustion of chlorobenzene at low temperature over Ru-Ce/TiO2: High activity and high selectivity . | APPLIED CATALYSIS A-GENERAL , 2021 , 623 . |
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Abstract :
In this paper, the effect of organic sulfur on the catalytic oxidation of toluene was explored. It was found that the low concentration of organic sulfur could cause rapid deactivation of the catalyst, and the activity of the catalyst could be restored to 100% after stopping the application of sulfur. The sulfation modification could significantly improve the organic sulfur resistance of the catalyst by changing the support and the sulfation modification of the support. There was a large amount of carbon deposition and a small amount of S-containing substances on the catalyst surface after the introduction of organic sulfur through the methods of TG, BET, FTIR, SEM (Mapping) and XPS. Then, through in-situ DRIFT and CH3SH-TPD, it was found that sulfation modification could inhibit the adsorption of organic sulfur on the catalyst surface and reduce the competitive adsorption. The decrease of catalyst efficiency due to the presence of organic sulfur in the reaction gas during VOCs catalytic oxidation is mainly due to the competitive adsorption of organic sulfur and VOCs molecules, and the temperature of VOCs catalytic oxidation of organic sulfur. Some polyhydrocarbons, ethyl sulfide, dimethyl sulfoxide and other substances were produced by incomplete oxidation, which covered the surface of the catalyst due to adsorption or deposition, resulting in catalyst poisoning.
Keyword :
Poison mechanism Poison mechanism Organic sulfur Organic sulfur Catalytic oxidation Catalytic oxidation VOCs VOCs
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GB/T 7714 | Ren, Sida , Liang, Wenjun , Fang, Hongping et al. Performance and poisoning analysis of organic sulfur resistance of Pd-Ce catalyst in catalytic oxidation of VOCs [J]. | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2021 , 9 (6) . |
MLA | Ren, Sida et al. "Performance and poisoning analysis of organic sulfur resistance of Pd-Ce catalyst in catalytic oxidation of VOCs" . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 9 . 6 (2021) . |
APA | Ren, Sida , Liang, Wenjun , Fang, Hongping , Zhu, Yuxue . Performance and poisoning analysis of organic sulfur resistance of Pd-Ce catalyst in catalytic oxidation of VOCs . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2021 , 9 (6) . |
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Abstract :
随着世界范围内新一轮科技革命和信息产业技术革命的发展,新型教育技术如雨后春笋般步入课堂,正引领我国高等教育步入崭新的阶段.针对环境类专业学位课"大气污染控制工程"教学中的一些问题,根据课程的特点,加强课程群建设,将理论和实践教学相结合,打造智慧课堂,促进师生互动,提升教学质量,培养学生的实践能力、思维创新能力、将所学知识融会贯通并综合运用的能力,以符合新工科人才培养需求,实现工程应用型人才培养的教育目标.
Keyword :
教学改革 教学改革 工程应用型人才 工程应用型人才 新工科 新工科 大气污染控制工程 大气污染控制工程
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GB/T 7714 | 梁文俊 , 刘佳 , 李坚 . 新工科视角下环境类专业学位课教学改革探索 [J]. | 教育教学论坛 , 2021 , (32) : 47-50 . |
MLA | 梁文俊 et al. "新工科视角下环境类专业学位课教学改革探索" . | 教育教学论坛 32 (2021) : 47-50 . |
APA | 梁文俊 , 刘佳 , 李坚 . 新工科视角下环境类专业学位课教学改革探索 . | 教育教学论坛 , 2021 , (32) , 47-50 . |
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Abstract :
为了有效控制煤尘大气污染和解决农业废弃物再利用的问题,以农业废弃物为原料制备环保抑尘剂并应用于煤尘控制,实现以废治污的目的.该抑尘剂以秸秆酶解液为主要原料,考察了辅料粘结剂、保湿剂和表面活性剂对抑尘剂性能的影响.研究中通过单因素实验确定出粘结剂瓜尔豆胶、阴离子表面活性剂十二烷基硫酸钠(K 12)和保湿剂乳酸钠的比例范围,并通过正交实验的方法优化了抑尘剂配方,所制得的抑尘剂在黏度和溶液的润湿性上可以表现出更优异的抑尘性能,优化配方后抑尘剂的黏度为5.8 mPa?s、表面张力为31.20 mN/m、接触角为15.2°,具有较好的润湿性能;在8 m/s的模拟风速条件下,2 h内可保持100%的抑尘效率,可以实现有效抑制煤尘的作用.煤场实际应用结果表明,使用抑尘剂后可使煤场的PM10浓度由145.2 mg/m3降至环境背景浓度,可以达到有效抑制风力扬尘的效果.
Keyword :
煤尘 煤尘 正交实验 正交实验 秸秆 秸秆 抑尘剂 抑尘剂 单因素实验 单因素实验
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GB/T 7714 | 梁文俊 , 兰童 , 张志学 et al. 新型环保煤尘抑尘剂的制备及其应用 [J]. | 中国煤炭 , 2021 , 47 (6) : 57-65 . |
MLA | 梁文俊 et al. "新型环保煤尘抑尘剂的制备及其应用" . | 中国煤炭 47 . 6 (2021) : 57-65 . |
APA | 梁文俊 , 兰童 , 张志学 , 任思达 , 王艳磊 . 新型环保煤尘抑尘剂的制备及其应用 . | 中国煤炭 , 2021 , 47 (6) , 57-65 . |
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