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Optimizing the sulfur-resistance and activity of perovskite oxygen carrier for chemical looping dry reforming of methane

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Journal of Energy Chemistry 2024年第9期96卷 259-271页

作者： Yuelun Li Dong Tian Lei jiang Huicong Zuo linan huang Mingyi Chen Jianchun Zuo Hua Wang Kongzhai Li Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction Ministry of EducationKunming University of Science and TechnologyKunming 650093YunnanChina Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunming 650093YunnanChina

Perovskite oxides has been attracted much attention as high-performance oxygen carriers for chemical looping reforming of methane,but they are easily inactivated by the presence of trace H_(2)***,we propose to modulate both the activity and resistance to sulfur poisoning by dual substitution of Mo and Ni ions with the Fe-sites of LaFeO_(3)*** is found that partial substitution of Ni for Fe substantially improves the activity of LaFeO_(3)perovskite,while Ni particles prefer to grow and react with H_(2)S during the long-term successive redox process,resulting in the deactivation of oxygen *** the presence of Mo in LaNi_(0.05)Fe_(0.95)O_(3−σ)perovskite,H_(2)S preferentially reacts with Mo to generate MoS_(2),and then the CO_(2)oxidation can regenerate Mo via removing *** addition,Mo can inhibit the accumulation and growth of Ni,which helps to improve the redox stability of oxygen *** LaNi_(0.05)Mo_(0.07)Fe_(0.88)O_(3−σ)oxygen carrier exhibits stable and excellent performance,with the CH_(4)conversion higher than 90%during the 50 redox cycles in the presence of 50 ppm H_(2)S at 800℃.This work highlights a synergistic effect in the perovskite oxides induced by dual substitution of different cations for the development of high-performance oxygen carriers with excellent sulfur tolerance.

关键词： Perovskite oxygen carriers Chemical looping reforming Sulfur-resistance Dual substitution Syngas

DFT insights into oxygen vacancy formation and chemical looping dry reforming of methane on metal-substituted CeO_(2)(111)surface

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Frontiers of Chemical Science and Engineering 2024年第12期18卷 153-167页

作者： Mingyi Chen Zeshan Wang Yuelun Li Yuxin Wang Lei Jiang Huicong Zuo linan huang Yuhao Wang Dong Tian Hua Wang Kongzhai Li Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction(Ministry of Education) Kunming University of Science and TechnologyKunming 650093China Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093China State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunming 650093China

The oxygen vacancy formation energy and chemical looping dry reforming of methane over metal-substituted CeO_(2)(111)are investigated based on density functional theory *** calculated results indicate that among the various metals that can substitute for the Ce atom in the CeO_(2)(111)surface,Zn substitution results in the lowest oxygen vacancy formation *** the activation of CH4 on CeO_(2)(111)and Zn-substituted CeO_(2)(111)surfaces,the calculated results illustrate that the dissociation process of CH_(3)(ads)is very difficult on pristine surfaces and unfavorable for CHO(ads)on substituted ***,the dissociative adsorption of CO and H_(2) on the Zn-substituted CeO_(2)(111)surface requires high energy,which is unfavorable for syngas *** work demonstrates that excessive formation of oxygen vacancy can lead to excessively high adsorption energies,thus limiting the conversion efficiency of the reaction *** finding provides important guidance and application prospects for the design and optimization of oxygen carrier materials,especially in the field of chemical looping dry methane reforming to syngas.

关键词： Zn-substituted CeO_(2)(111) oxygen vacancy formation chemical looping dry reforming of methane density functional theory

Suppressing byproduct formation for high selective CO_(2) reduction over optimized Ni/TiO_(2) based catalysts

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Journal of Energy Chemistry 2022年第9期31卷 465-478,I0013页

作者： Danyang Li Ruidong Xu Roong Jien Wong Xing Zhu Dong Tian Lei Jiang Qingjie Guo Hongcun Bai linan huang Wen Liu Hua Wang Kongzhai Li Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction Ministry of EducationKunming University of Science and TechnologyKunming 650093YunnanChina School of Chemical and Biomedical Engineering Nanyang Technological UniversitySingapore 637459Singapore State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering Ningxia UniversityYinchuan 750021NingxiaChina Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina

One of the challenges for catalytic CO_(2)reduction is to control product selectivity,and new findings that can modify selectivity would be ***,two kinds of TiO_(2)(homemade and commercial)with the same crystal phase but different surface properties are chosen as supports to prepare Ni-based catalysts for CO_(2)reduction,which show distinctly different product selectivity for CO_(2)reduction to CH_(4) or CO,as well as the CO_(2)*** catalysts based on the homemade TiO_(2)support are highly selective for CH_(4) formation,while the latter ones are about 100%selective for CO formation under the same reaction *** addition,the former ones are much active(more than 3 times)than the latter *** found that the collaborative contribution of Ti^(3+)and Ni^(2+)species and the electronic metal-support interactions effect maybe the main driving force behind for determining the product *** is almost exclusively produced over the catalysts with abundant Ti^(3+)and Ni^(2+)species and greater electronic metal-support interaction,otherwise,it will give priority to CO *** addition of CeO_(2)can reduce the Ni particle size and improve the dispersion of Ni nanoparticles,as well as create more Ti^(3+)species,contributing to the enhancement of CO_(2)conversion,but shows a negligible effect on product ***,the in situ DRIFT experiments and kinetic experiments indicate that the CO route is probably involved in the CO_(2)reduction process over the homemade Ni-CeO_(2)/TiO_(2)-CO catalyst with abundant Ti^(3+)and Ni^(2+)species and a strong electronic transform effect.

关键词： CO_(2)reduction Ni-based catalysts TiO_(2)support Product selectivity Surface and interface properties

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污水排放对红树林湿地生态系统的影响

生态学杂志 2000年第2期19卷 13-19页

作者：黄立南蓝崇钰束文圣中山大学环境科学系广州510275 中山大学生命科学学院广州510275

In order to study the feasibility of using mangrove wetland as a facility for sewage treatment and the effects of wastewater discharge on soil and plants of the mangrove ecosystem,the field work was conducted during December 1994 to December 1995 in a mangrove wetland in Futian national nature reserve in Shenzhen. Two parallel elongated sites (sites A and B, each 180m×10m) stretching from land to sea were chosen for study. Since December 1994, Site A was continuously irrigated with municipal sewage every two days,while Site B served as a control. The ecological impact of sewage discharge on the mangrove wetland was assessed by comparing the plant growth, nutrients of soils and vegetation between Site A and Site B. One year later, total-N and NH 4 +-N in the soil increased and EC decreased significantly at Site A. And obvious changes in pH value and other nutrient contents in the soil of Site A could be detected. However, the nutrient contents of the leaves of the dominant plants collected from Site A and B were very close and no significant difference in terms of tree height and diameter and biomass was found between the two sites.

关键词：污水排放红树林湿地生态系统土壤植被

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深圳福田两种红树林植物叶片分解研究

应用生态学报 2001年第1期12卷 35-38页

作者：黄立南蓝崇钰束文圣中山大学广州510275

利用分解袋法研究两种红树林植物 (秋茄、桐花 )叶片在野外实地分解过程中的干物质和有机C、N、P变化情况 .结果表明 ,秋茄叶片野外分解的速度要比桐花叶片快得多 ,初始非灰分物质干重 (AFDW )损失一半所需的时间秋茄为 12d ,桐花 35d左... 详细信息

利用分解袋法研究两种红树林植物 (秋茄、桐花 )叶片在野外实地分解过程中的干物质和有机C、N、P变化情况 .结果表明 ,秋茄叶片野外分解的速度要比桐花叶片快得多 ,初始非灰分物质干重 (AFDW )损失一半所需的时间秋茄为 12d ,桐花 35d左右 .分解开始后 ,两种叶片的N含量均迅速上升 ,到达峰值后逐渐下降 ;而P含量则先略为下降 ,之后慢慢回升 ;叶片有机C含量则始终保持在相对较为稳定的水平上 .试验的结果还表明 ,桐花叶片在红树林系统内沿潮汐梯度的不同滩面位置上分解时。

关键词：红树林叶片分解水生植物

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足底驱动截瘫助行的仿真研究

清华大学学报（自然科学版） 2015年第3期55卷 285-291页

作者：黄立男洪跃镇关鑫宇王人成季林红清华大学机械工程系摩擦学国家重点实验室智能与生物机械分室北京100084

为了研究足底驱动助行方式运用于截瘫患者着地行走中的可行性,该文分析了足底驱动式辅具相比于髋-膝关节驱动式助行辅具在行走训练中的优势。研究通过仿真、对比分析和实验验证的方法,对正常行走步态和早期康复患者存在的滑步步态进行... 详细信息

为了研究足底驱动助行方式运用于截瘫患者着地行走中的可行性,该文分析了足底驱动式辅具相比于髋-膝关节驱动式助行辅具在行走训练中的优势。研究通过仿真、对比分析和实验验证的方法,对正常行走步态和早期康复患者存在的滑步步态进行了关节角度变化分析,论证以滑步步态为依据设置足底驱动助行辅具的可行性;建立了正常步态和滑行步态的运动学模型,采用足底驱动方式虽使整体的运动复杂性增加,但同时将允许髋关节实现更多的活动模式;对正常步态和滑行步态的驱动力矩进行了评估,表明滑行步态所需要的驱动力更小,符合早期康复患者的移动特征。采用足底驱动式助行策略的辅具在适应截瘫患者差异性步态方面较髋-膝关节驱动式助行存在较佳效果,因此将提高辅具的易用性和适配性,应可视为下肢功能较弱或康复进度不理想患者的另外一种可供选择的助行方式。

关键词：康复工程截瘫行走助行方式步态辅具

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寡营养细菌及其在环境科学中的应用

应用生态学报 2005年第4期16卷 773-777页

作者：张崇邦黄立南栾天罡蓝崇钰中山大学生命科学学院生物防治国家重点实验室

寡营养细菌是生存在寡营养环境中的一类细菌,其多样性与生物量在整个生物圈组成中都具有较大的优势,因而在生物地球化学循环中发挥着重要作用.从2 0世纪80年代开始,寡营养细菌在自然或人为环境中的寡营养机制、对饥饿的生理反应以及在... 详细信息

寡营养细菌是生存在寡营养环境中的一类细菌,其多样性与生物量在整个生物圈组成中都具有较大的优势,因而在生物地球化学循环中发挥着重要作用.从2 0世纪80年代开始,寡营养细菌在自然或人为环境中的寡营养机制、对饥饿的生理反应以及在生态系统中的作用一直是微生物生态学研究的前沿领域之一,其理论价值与应用前景已受到各国微生物生态学家与环境科学家们的广泛重视.本文综述了寡营养细菌的基本概念、营养类型、生理生态特性、可能的寡营养机制、主要研究方法以及在医学细菌检测和环境重金属监测中的应用等,并指出了寡营养细菌在环境科学中的应用前景.

关键词：寡营养细菌生态特征环境科学

城镇生活污水排放对红树林植物群落凋落物的影响

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应用与环境生物学报 2000年第6期6卷 505-510页

作者：黄立南蓝崇钰束文圣李明顺中山大学环境科学系广州510275 中山大学生命科学学院广州510275 广东省环境监测中心站广州510030

利用凋落物收集网研究城镇生活污水排放对红树林植物群落凋落物的影响 .所研究的红树林群落年总凋落物量为 1198.91gm-2 ,其中叶片和繁殖物部分共占 90 %左右 .总凋落物量具有明显的季节变化模型 ,凋落物的高峰期落在多雨的夏季 ,尤其... 详细信息

利用凋落物收集网研究城镇生活污水排放对红树林植物群落凋落物的影响 .所研究的红树林群落年总凋落物量为 1198.91gm-2 ,其中叶片和繁殖物部分共占 90 %左右 .总凋落物量具有明显的季节变化模型 ,凋落物的高峰期落在多雨的夏季 ,尤其是 8月份 .污水排放一年期间 ,排污样带和对照样带之间红树林的总凋落物量以及凋落叶中的总有机碳、总氮、总磷水平没有显著的差异 ,污水排放没有导致红树林植物群落的凋落物量发生明显的变化 .月凋落物量 (Y/gm-2 )与月降水量 (X1/mm)、月平均气温 (X2 /℃ )的回归公式分别为Y =0 .174X1+ 6 4.2 15 ,r=0 .6 3 和Y =7.0 5 3X2 - 5 8.435 ,r=0 .6 1 ,相关极显著 .图 4表 3参 2

关键词：红树林凋落物植物群落生活污水影响

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卫生填埋场渗滤液及其处理研究

生态科学 1999年第1期18卷 39-43页

作者：黄立南蓝崇钰姜必亮中山大学环境科学系中山大学生命科学学院

卫生填埋被认为可能是最简便、最经济的城市固体废物处理方式并被世界上越来越多的国家所推广，然而其渗滤液对周围环境的污染也成为全球范围内所普遍面临的难题．简要介绍垃圾填埋场渗滤液产生的原因、渗滤液的主要成分及其生态影响。

关键词：卫生填埋汤渗滤液处理