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Journal of Environmental Sciences 2024年第2期136卷 213-225页

作者： Bowen Xu Jiaxin Qu Xueqian Wang Langlang Wang Yu Pu ping ning Yibing Xie Yixing Ma Qiang Ma Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China School of Architecture and Civil Engineering Chengdu UniversityChengdu 610106China

To investigate the enhancing effect of Mn on the performance of simultaneous catalytic oxidation of AsH_(3)and PH_(3)by CuO-Al_(2)O_(3)in a reducing atmosphere under micro-oxygen conditions,Cu-Mn modifiedγ-Al_(2)O_(3)catalysts were *** characteristics of the catalysts showed that Mn reduced the crystallinity of the active CuO component,increased the number of oxygen vacancies and acidic sites on the catalyst surface,enhanced the mobility of surface oxygen,and the interaction between copper and manganese promoted the redox cycling ability of the catalysts and improved their oxidation performance,which increased the conversion frequency(TOF)by 2.54×10^(-2)to 3.07×10^(-2)sec^(-1).On the other hand,the introduction of Mn reduced the production of phosphate and As_(2)O_(3)on the catalyst surface by30.96%and 44.9%,which reduced the coverage and inerting of the active sites by phosphate and As_(2)O_(3),resulting in an 8 hr(6 hr)improvement in the stability of PH_(3)(AsH_(3))removal.

关键词： AsH_(3)-PH_(3)removal Oxygen activation Mn doping Stability enhancement

High efficiency removal of NO using waste calcium carbide slag by facile KOH modification

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Journal of Environmental Sciences 2024年第5期139卷 182-192页

作者： Fang Wang Hui Li Jiyun Gao Na Geng Enzhu Jiang Futing Xia Mingwu Xiang Lijuan Jia ping ning School of Chemistry and Environment Yunnan Minzu UniversityKunming 650504China Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China

Waste calcium carbide slags(CS),which are widely applied to desulfurisation,are not typically used in ***,to well achieve waste control by waste,a facile and highefficiency denitration strategy is developed using KOH to modify the calcium carbide slags(KCS).Various KCS samples were investigated using a series of physical and chemical *** performance test results showed that the KOH concentration and reaction temperature are the main factors affecting the denitration efficiency of KCS,and CS modified with 1.5 mol/L KOH(KCS-1.5)can achieve 100% denitration efficiency at 300℃.Such excellent removal efficiency is due to the catalytic oxidation of the oxygen-containing functional groups derived from the *** studies showed that KOH treatment significantly increased the concentration of oxygen vacancies,nitro compounds,and basic sites of *** study provides a novel strategy for the resource utilisation of waste CS in the future.

关键词： Waste Carbide slag KOH Effective denitration

Boosting the catalytic performance of Cu-SAPO-34in NO_(x) removal via hydrothermal treatment

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Journal of Environmental Sciences 2024年第1期135卷 640-655页

作者： Xiaoyan Tian Huimin Wang Siyuan Xu Lianyun Gao Jinyan Cao Jianjun Chen Qiulin Zhang ping ning Jiming Hao Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries Kunming University of Science and TechnologyKunming 650500China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijing 100084China

Phosphate ions promoted Cu-SAPO-34(P-Cu-SAPO-34)were prepared using bulk CuO particles as Cu^(2+)precursor by a solid-state ion exchange technique for the selective catalytic reduction of NO_(x) with NH_3(NH_3-SCR).The effects of high temperature(H-T)hydrothermal aging on the NO_(x) removal(de-NO_(x))performance of Cu-SAPO-34 with and without phosphate ions were systematically investigated at atomic *** results displayed that both Cu-SAPO-34 and P-Cu-SAPO-34 presented relatively poor NO_(x) removal activity with a low conversion(<30%)at 250-500℃.However,after H-T hydrothermal treatment(800℃ for 10 hr at 10%H_2O),these two samples showed significantly satisfied NO_(x) elimination performance with a quite high conversion(70%-90%)at 250-500℃.Additionally,phosphate ions decoration can further enhance the catalytic performance of Cu-SAPO-34 after hydrothermal treatment(Cu-SAPO-34H).The textural properties,morphologies,structural feature,acidity,redox characteristic,and surface-active species of the fresh and hydrothermally aged samples were analyzed using various characterization *** systematical characterization results revealed that increases of 28%of the isolated Cu^(2+)active species(Cu^(2+)-2Z,Cu(OH)^(+)-Z)mainly from bulk CuO and 50%of the Bronsted acid sites,the high dispersion of isolated Cu^(2+)active component as well as the Bronsted acid sites were mainly responsible for the accepted catalytic activity of these two hydrothermally aged samples,especially for P-Cu-SAPO-34H.

关键词： NH_(3)-SCR Cu-SAPO-34 Hydrothermal induced Phosphate ions

Zonal activation of molecular carbon dioxide and hydrogen over dual sites Ni-Co-MgO catalyst for CO_(2) methanation:Synergistic catalysis of Ni and Co species

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Journal of Energy Chemistry 2024年第4期91卷 213-225页

作者： Zonglin Li Jianjun Chen Yu Xie Junjie Wen Huiling Weng Mingxue Wang Jingyi Zhang Jinyan Cao Guocai Tian Qiulin Zhang ping ning Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500YunnanChina National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries Kunming University of Science and TechnologyKunming 650500YunnanChina Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina

An in-depth mechanism in zonal activation of CO_(2)and H2molecular over dual-active sites has not been revealed ***,Ni-Co-MgO was rationally constructed to elucidate the CO_(2)methanation *** abundant surface nickel and cobalt components as active sites led to strong Ni-Co interaction with charge transfer from nickel to ***,electron-enriched Coδ-species participated in efficient chemisorption and activation of CO_(2)to generate monodentate ***,plentiful available Ni0sites facilitated H2dissociation,thus CO_(2)and H2were smoothly activated at zones of Coδ-species and Ni0,*** in situ DRIFTS,quasi situ XPS,TPSR,and DFT calculations substantiated a new formate evolution mechanism via monodentate carbonate instead of traditional bidentate carbonate based on synergistic catalysis of Coδ-species and *** zonal activation of CO_(2)and H2by tuning electron behaviors of double-center catalysts can boost heterogeneous catalytic hydrogenation performance.

关键词： Zonal activation CO_(2) methanation Dual active sites Synergistic effect

Advances in selective catalytic oxidation of ammonia (NH_(3)-SCO): A review of catalyst structure-activity relationship and design principles

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Chinese Chemical Letters 2024年第1期35卷 169-180页

作者： Zhao Li Chunxue Wang Junjun Qiu Yixing Ma Chi Wang Xin Sun Kai Li ping ning Fei Wang Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries Kunming 650500China Faculty of Chemical Engineering Kunming University of Science and TechnologyKunming 650500China

NH_(3) in ambient air directly leads to an increase in the aerosol content in the air. These substances lead to the formation of haze to various environmental problems after atmospheric circulation and diffusion. Controlling NH_(3) emissions caused by ammonia escaping from mobile and industrial sources can effectively reduce the NH_(3) content in ambient air. Among the various NH_(3) removal methods, the selective catalytic oxygen method (NH_(3)-SCO) is committed to oxidizing NH_(3) to environmentally harmless H_(2)O and N_(2);therefore, it is the most valuable and ideal ammonia removal method. In this review, the characteristics of loaded and core-shell catalysts in NH_(3)-SCO have been reviewed in the context of catalyst structure-activity relationships, and the H_(2)O resistance and SO2 resistance of the catalysts are discussed in the context of practical application conditions. Then the effects of the valence state of the active center, oxygen species on the catalyst surface, dispersion of the active center and acidic sites on the catalyst performance are discussed comprehensively. Finally, the shortcomings of the existing catalysts are summarized and the catalyst development is discussed based on the existing studies.

关键词： Ammonia Selective catalytic oxidation Active metals and supports Influence of gas composition Reaction mechanism Catalyst structure-activity relationship

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互联网时代下的中国传统节日文化传播

长春大学学报 2024年第7期34卷 70-73页

作者：宁萍韩瑞大学人文学院韩国瑞山31962

依托互联网社交媒体开展中国传统节日文化的传播工作,能够全方位诠释中国节日的深厚文化内涵,促进民族传统文化的传承与弘扬。本文总结了互联网时代创新中国节日传播形式的意义,详细论述了互联网时代下中国节日传播面临的机遇和挑战,提... 详细信息

依托互联网社交媒体开展中国传统节日文化的传播工作,能够全方位诠释中国节日的深厚文化内涵,促进民族传统文化的传承与弘扬。本文总结了互联网时代创新中国节日传播形式的意义,详细论述了互联网时代下中国节日传播面临的机遇和挑战,提出了依托社交媒体传播和表达中国节日文化的路径,以实现中国节日文化与社交媒体的完美整合,提升公众的民族文化自信心,在新时代彰显中国节日的无穷魅力。

关键词：中国传统节日文化传播社交媒体

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大型灌区渡槽选型及结构设计方案研究

黑龙江水利科技 2024年第5期52卷 79-82页

作者：宁萍德州市李家岸灌区运行维护中心山东德州253000

李家岸灌区位于山东省德州市东部,是山东省第三大灌区,灌区不仅需向齐河、临邑、陵城、乐陵、庆云、宁津6个县提供灌溉、生活和工业用水,同时还有引黄济冀等跨流域供水任务。该灌区的渡槽选型、结构方案将会决定工程投资、工程安全。因... 详细信息

李家岸灌区位于山东省德州市东部,是山东省第三大灌区,灌区不仅需向齐河、临邑、陵城、乐陵、庆云、宁津6个县提供灌溉、生活和工业用水,同时还有引黄济冀等跨流域供水任务。该灌区的渡槽选型、结构方案将会决定工程投资、工程安全。因此,在进行工程布置时,需结合实际情况对渡槽的型式和结构进行对比分析。基于此,文章对李家岸灌区渡槽工程结构型式进行了对比分析,计算了槽身断面尺寸、进出口渐变段长度、水头损失等水力参数,对槽身结构、盖梁、槽身止水等进行了设计,以期为大型渡槽工程选型及结构设计提供参考。

关键词：李家岸大型灌区渡槽选型结构设计

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铜冶炼烟尘金属分离及资源回收研究进展

中南大学学报（自然科学版） 2024年第3期55卷 882-894页

作者：蔡兵陶雷王郎郎王学谦田森林宁平王润东昆明理工大学环境科学与工程学院云南昆明650500 云南锡业股份有限公司铜业分公司云南个旧661000 安庆师范大学资源环境学院安徽安庆246133

以铜冶炼烟尘为研究对象,分析其理化及矿物学性质,对比铜冶炼烟尘金属分离与回收方法,包括碳热还原法、硫酸浸出法、碱性浸出法和湿法-火法联合工艺,总结各方法的原理、典型工艺、现状和存在问题,阐述非常规冶金方法在铜冶炼烟尘金属分... 详细信息

以铜冶炼烟尘为研究对象,分析其理化及矿物学性质,对比铜冶炼烟尘金属分离与回收方法,包括碳热还原法、硫酸浸出法、碱性浸出法和湿法-火法联合工艺,总结各方法的原理、典型工艺、现状和存在问题,阐述非常规冶金方法在铜冶炼烟尘金属分离中的应用,展望铜冶炼烟尘资源回收的发展方向。研究结果表明:铜冶炼烟尘中砷、铜、锌含量受冶炼工艺、原矿品质的影响,不同元素赋存形态存在差异。碳热还原法可以通过金属砷酸盐和氧化物分解的方式释放砷,从而实现砷与其他有价金属的分离;硫酸浸出法可以高效浸提铜冶炼烟尘中的金属,实现多元素的回收;碱性浸出法可选择性浸提砷;湿法-火法联合工艺结合了火法工艺选择性分离砷和湿法工艺高效提取金属的优点,对于复杂高砷铜冶炼烟尘处理具有优势。铜冶炼烟尘兼具资源属性和环境风险,实现清洁生产及多金属资源化利用仍是关键,砷的无害化处置与锌、铜、铅等有价金属的高效协同回收工艺及分离机制、全过程物质流与环境效应是铜冶炼烟尘资源回收的发展方向。

关键词：铜冶炼烟尘资源回收火法湿法

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镧掺杂棒状二氧化铈催化剂低温水解羰基硫的性能

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工程科学学报 2024年第7期46卷 1300-1310页

作者：资双艳王雪琦田宇庞亚彤黄蓓宁平李凯昆明理工大学环境科学与工程学院昆明650031

在低温下实现高炉煤气中羰基硫(COS)的高精度脱除对环境保护意义重大,催化水解法可以在较低的操作温度下将COS转化成更易脱除的H2S.通过制备三种不同形貌的二氧化铈(CeO_(2)),以及在棒状二氧化铈(CeO_(2)-R)中掺杂不同质量分数的金属镧(... 详细信息

在低温下实现高炉煤气中羰基硫(COS)的高精度脱除对环境保护意义重大,催化水解法可以在较低的操作温度下将COS转化成更易脱除的H2S.通过制备三种不同形貌的二氧化铈(CeO_(2)),以及在棒状二氧化铈(CeO_(2)-R)中掺杂不同质量分数的金属镧(La),对催化剂表面氧空位和碱性位点进行调控,探讨氧空位和碱性位点对催化活性的影响,并提出催化剂失活机理.研究发现,CeO_(2)-R具有较多的表面羟基和氧空位含量,在反应温度为75℃,相对湿度为17%时表现出了优异的COS脱除能力,进一步掺杂不同含量La后催化剂的氧空位和表面碱性强度都明显提高,其中,掺杂质量分数为10%的金属La的催化剂100%脱除COS的持续时间较CeO_(2)-R提高了120%,达到570 min.X射线衍射(XRD)、X射线电子光谱(XPS)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)表征表明,金属La掺杂进入到CeO_(2)-R的晶格内,形成固溶体结构.电子顺磁共振(EPR)和二氧化碳程序升温脱附(CO_(2)-TPD)分析表明La与CeO_(2)的协同作用形成了更多不对称的氧空位,并提高了催化剂碱性强度,氧空位与碱性位点的共同作用提高了催化剂对COS的脱除能力.在反应过程中生成硫酸盐等副产物沉积在催化剂表面,堵塞孔隙,覆盖活性中心导致催化剂硫中毒.综上所述,通过探讨催化剂表面的结构和化学性质,为低温催化水解COS提供了新的认识,对开发高效、稳定的COS水解催化剂具有指导意义.

关键词：羰基硫碱性位点水解催化氧空位二氧化铈

Advanced purification and comprehensive utilization of yellow phosphorous off gas

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Frontiers of Environmental Science & Engineering 2015年第2期9卷 181-189页

作者： ping ning Xiangyu WANG Faculty of Environmental Science and Engineering Kunrning University of Science and Technology Kunming 650500 China

Yellow phosphorous is an important raw material in the chemical industry. However, during the production of yellow phosphorous, high concentrations of carbon monoxide and other impurities are released. Without appropriate purification and removal, this off gas has potential to cause severe pollution problems once released. Purified yellow phosphorous off gas can be beneficially reused as a raw material in chemical production for synthesis of high value-added chemical reagents. In this paper, the significance of purification and reutilization of yellow phosphorous off gas are explored. The principles, processes, and main characteristics of the technologies for purification and reuse of yellow phosphorus off gas （including technical measurements of impurity reduction, relevant engineering cases, and public acceptance of the technologies） are summarized. In view of the existing problems and scientific development require- ments, this paper proposes green production based several recommendations for on the concept of recycle economics. We conclude that advanced purification and comprehensive reutilization can be an effective solution for heavy pollution resulting from yellow phosphorous off gassing.

关键词： yellow phosphorous off gas purification,comprehensive utilization