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Perovskite Oxides La0.8Sr0.2Co1-xFexO3 for CO Oxidation and CO＋NO Reduction： Effect of Redox Property and Surface Morphology

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Chemical Research in Chinese Universities 2018年第1期34卷 119-126页

作者： YU Ke DIAO Tingting ZHU Junjiang zhao zhen Institute of Catalysis for Energy and Environment College of Chemistry and Chemical Engineering Shenyang Normal University Shenyang 110034 P. R. China key laboratory of Catalysis and Materials Science of the state Ethnic Affairs Commission & Ministry of Educaaon South-central University for Nationalities Wuhan 430074 P. It China state key laboratory of heavy oil processing China University of Petroleum Beijing 102249 P. R. China

This work aims to study the effect of redox property and surface morphology of perovskite oxides on the catalytic activity of CO oxidation and CO＋NO reduction, with the redox property being tuned by doping Fe at the Co site of La0.8Sr0.2Co1-xFexO3 and the surface morphology being modified by supporting La0.8Sr0.2CoO3 on various mesoporous silicas（i.e., SBA-16, SBA-15, MCF）. Characteristic results show that the Fe doping improves the match of redox potentials, and SBA-16 is the best support of La0.8Sr0.2CoO3 when referring to the oxidation ability（e.g., the Co^3＋/Co^2＋ molar ratio）. A mechanism for oxygen desorption from perovskite oxides is proposed based on O2-TPD experiments, showing the evolution process of oxygen released from oxygen vacancy and lattice framework. Catalytic tests indicate that La0.8Sr0.2CoO3 is the best for CO oxidation, and La0.8Sr0.2FeO3 is the best for CO＋NO reduction. The mechanism of CO＋NO reduction changes as the reaction temperature increases, with XNO/XCO value decreases from 2.4 at 250℃ to 1.0 at 400℃. As for the surface morphology, La0. Sr0.2CoO3 supported on SBA-16 possesses the highest surface Co^3＋/Co^2＋ molar ratio as compared to the other two, and shows the best activity for CO oxidation.

关键词： Perovskite oxide Redox property Surface morphology Mesoporous silica CO oxidation CO+NO reduction

K-modified MnO_(δ)catalysts with tunnel structure and layered structure:Facile preparation and catalytic performance for soot combustion

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Nano Research 2023年第5期16卷 6187-6199页

作者： Chao Peng Yu Ren Di Yu Lanyi wang Chunlei Zhang Xiaoqiang Fan Xuehua Yu zhen zhao Yuechang Wei Jian Liu Institute of Catalysis for Energy and Environment College of Chemistry and Chemical EngineeringShenyang Normal UniversityShenyang 110034China state key laboratory of heavy oil processing China University of PetroleumBeijing 102249China

Air pollution from particulate matter produced by incomplete combustion of diesel fuel has become a serious environmental pollution problem,which can be addressed by catalytic *** this work,a series of K-modified MnO_(δ)catalysts with different microstructures were synthesized by the hydrothermal method,the relationship between structure of the catalysts and their catalytic performance for soot combustion was studied by characterization techniques and density functional theory(DFT)*** showed that the prepared catalysts had good catalytic performance for soot combustion and could completely oxidize soot at temperatures below 400℃.The cryptomelane-type K_(2−x)Mn_(8)O_(16)(K-OMS-2)with tunnel structure had excellent NO oxidation capacity and abundance of Mn^(4+)ions(Mn^(4+)/Mn^(3+)=1.24)with good redox ability,it demonstrated better soot combustion performance than layered birnessite-type K_(2)Mn_(4)O_(8)(K-OL-1).The T_(10),T_(50),T_(90)temperatures of KOMS-2 were 269,314,346℃,*** K-OMS-2 catalyst also showed excellent stability after five catalytic cycles,with T_(10),T_(50),T_(90)values holding in the ranges of 270±2,316±2,348±3℃,respectively.

关键词： K-modified MnO_(δ) hydrothermal method tunnel structure layered structure soot combustion

Synthesis and catalytic performance of macroporous La1-xCexCoO3 perovskite oxide catalysts with high oxygen mobility for catalytic combustion of soot

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Journal of Rare Earths 2020年第6期38卷 584-593页

作者： Jiachen Sun zhen zhao Yazhao Li Xuehua Yu Linlin zhao Jianmei Li Yuechang Wei Jian Liu state key laboratory of heavy oil processing China University of Petroleum-BeijingBeijing 102249China Institute of Catalysis for Energy and Environment College of Chemistry and Chemical EngineeringShenyang Normal UniversityShenyang 110034China

The disordered macroporous-mesoporous La1-xCexCoO3 catalysts were prepared by complexcombustion method with ethylene glycol as complexing agent at relatively low calcination *** samples were characterized by means of X-ray diffraction,N2 adsorption-ndash;desorption,Xray photoelectron spectroscopy,transmission electron microscopy,hydrogen temperature-programmed reduction and soot temperature-programmed reduction,and so *** results show that the use of complexing agent and relatively low calcination temperature increase the specific surface area of the catalyst and have abundant pore *** Ce ions introduced into lattice of LaCoO3 mainly exist in the form of *** the same time,Ce ions enhance the redox performance of the catalyst and the mobility of active oxygen species,which enhances the catalytic activity of the catalyst for soot *** results of activity test show that La0.9Ce0.1CoO3 catalyst exhibits the highest activity in the absence of NO and NO2,and its T10,T50 and T90 are 371,444,and 497℃,*** the same time,a possible reaction mechanism is proposed in this study based on the turnover frequency(TOF) calculated by isothermal anaerobic titrations,XPS and XRD results.

关键词： Macroporous structure La1-xCexCoO3 perovskite oxide Reaction mechanism Soot combustion Rare earths

Exploiting ultra-large linear elasticity over a wide temperature range in nanocrystalline NiTi alloy

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Journal of Materials Science & Technology 2020年第22期54卷 197-203页

作者： zhen Sun Shijie Hao Genfa Kang Yang Ren Junpeng Liu Ying Yang Xiangguang Kong Bo Feng Cheng wang Kun zhao Lishan Cui state key laboratory of heavy oil processing China University of PetroleumBeijing 102249China beijing key laboratory of Failure Corrosionand Protection of Oil/Gas FacilitiesChina University of Petroleum BeijingBeijing 102249China X-ray Science Division Argonne National LaboratoryArgonneIL 60439USA state key laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China

Many shape memory alloys can support large recoverable strains of a few percent by reversible stressinduced martensite transformation,yet they behave non-linear within a narrow operating temperature ra *** the bulk metallic materials with ultra-large linear elasticity over a wide tempe rature range has proven to be *** this work,a material design concept was proposed,that is true elastic deformation and reversible twinning-detwinning deformation run in parallel to overcome this challe *** engineering the residual internal stress to realize the concurrency of true elastic deformation and twinning-detwinning deformation,a bulk nanocrystalline NiTi that possesses an ultra-large linear elastic strain up to 5.1 % and a high yield stress of 2.16 GPa over a wide temperature range of 270℃ was *** study offers a new avenue for developing the metallic materials with ultra-large linear elasticity over a wide temperature range of 270℃(from 70℃ to-197℃).

关键词： NiTi Nanocrystalline Linear-elasticity Wide temperature range Twinning

多元热流体不同组成介质耦合作用机理微观实验

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中国海上油气 2024年第2期36卷 119-128页

作者：范昕涵黄世军赵凤兰王斌陈悦罗远鹏中国石油大学(北京)石油工程学院北京102249 油气资源与工程全国重点实验室北京102249

多元热流体吞吐是蒸汽吞吐的重要接替方式之一,而现有的研究尚不能清晰解释不同介质之间的耦合作用机理,难以为海上多元热流体开发提供有效措施。利用微观可视化模拟系统,通过非凝析气(CO_(2)、N_(2))和热水的不同组合驱油实验,研究微... 详细信息

多元热流体吞吐是蒸汽吞吐的重要接替方式之一,而现有的研究尚不能清晰解释不同介质之间的耦合作用机理,难以为海上多元热流体开发提供有效措施。利用微观可视化模拟系统,通过非凝析气(CO_(2)、N_(2))和热水的不同组合驱油实验,研究微观条件下多相流动特点,揭示热水、CO_(2)和N_(2)三者之间两两相互影响的耦合作用机理,并定量分析耦合作用机理对波及系数、洗油效率和采收率的影响。研究结果表明:热水与N_(2)相互协同,提高波及系数,在驱替中期,热水加热稠油,降低流动阻力,N_(2)气泡变形膨胀,补充压力,在驱替后期,在主流道形成贾敏效应,驱替范围从主流道向边缘扩展;热水与CO_(2)相互协同,提高洗油效率,热水冲刷CO_(2)驱替过后的膜状剩余油,同时二者降低油气表面张力,将油气段塞式流动变为念珠式流动,消除附加表面张力,动用簇状剩余油,增大体系毛管数;CO_(2)和N_(2)之间相互竞争,N_(2)与CO_(2)分压,阻碍CO_(2)溶解,CO_(2)和N_(2)混合后,补能作用减弱;三种介质耦合作用时,采收率整体提高29%,协同作用效果比竞争作用效果更为显著。利用微观实验厘清多元热流体两两介质之间的耦合作用机理,为后期多元热流体开发稠油油藏提供理论指导。

关键词：海上稠油热采多元热流体微观可视化实验耦合机理协同作用机理竞争作用机理

Synthesis of Pt-SnOx/TS-1@SBA-16 Composites and Their High Catalytic Performance for Propane Dehydrogenation

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Chemical Research in Chinese Universities 2019年第5期35卷 866-873页

作者： LI Hongda zhao zhen LI Jiacheng LI Jianmei zhao Linlin SUN Jiachen FAN Xiaoqiang state key laboratory of heavy oil processing China University of PetroleumBeijing 102249P.R.China Institute of Catalysis for Energy and Environment College of Chemistry and Chemical EngineeringShenyang Normal UniversityShenyang 110034P.R.China

A novel composite material of TS-1@SBA-16 was synthesized by enwrapping TS-1 zeolite crystals with mesoporous SBA-16 silica. This composite was used as catalyst support for loading Pt-SnOx in the propane dehydr genation(PDH) reaction. Catalysts were characterized by means ofN2 adsorption-desorption, XRD, SEM, TEM, XPS, UV-Vis, and Raman spectroscopy. The effect of different contents of TS-1 on PDH was investigated, and the optimal amount of TS-1 was determined to be 10%. The catalyst with TS-1 content of 10% showed the highest PDH activity and the initial conversion of propane over it can achieve 54.5%, higher than those over TS-1 or SB A-16-supported ones. The superior catalytic performance of Pt-SnOx/TS-1 @SBA-16 is related to the synergistic effect of the excellent mass transfer performance through the hierarchical porous structure, suitable acid acidity and electronic effect of Ti species.

关键词： Catalyst Pt-SnOx Propane Dehydrogenation TS-1 zeolite Micro- and meso-porous material

无模板插层-剥离勃姆石合成具有优异稳定性的多孔硅掺杂氧化铝二维纳米片

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Science china Materials 2024年第1期67卷 261-271页

作者：赵振祥杨军王春霖薛岩涛吴浩谢威龙吴萍萍王纯正邢伟汪毅庞春霞庞泉德王晓化南军白鹏阎子峰 state key laboratory of heavy oil processing CNPC Key Laboratory of CatalysisCollege of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China Petrochina Lanzhou Petrochemical Research Center Lanzhou 730060China Shandong Xinbo Chemical Technology Co. LtdWeifang 262404China Petrochemical Research Institute PetroChina Company LimitedBeijing 100195China CNOOC Tianjin Chemical Research and Design Institute Co. LtdTianjin 300131China

高比表面积和大孔容的多孔氧化铝已被广泛应用在各种领域,但不使用有机模板合成多孔氧化铝仍面临巨大挑战.在此,我们报道了基于插层-剥离策略的多孔氧化铝合成方法,利用硅物种削弱勃姆石(氧化铝前体)的层间作用力,从而在不使用有机模板... 详细信息

高比表面积和大孔容的多孔氧化铝已被广泛应用在各种领域,但不使用有机模板合成多孔氧化铝仍面临巨大挑战.在此,我们报道了基于插层-剥离策略的多孔氧化铝合成方法,利用硅物种削弱勃姆石(氧化铝前体)的层间作用力,从而在不使用有机模板的情况下将勃姆石剥离成二维纳米片.该合成过程可放大到3 L,并获得厚度为2 nm的二维纳米片.此外,这些二维纳米片可组装成比表面为542 m^(2)g^(-1)和孔容为2.43 cm^(3)g^(-1)的勃姆石.在不同温度下对二维纳米片进行热/水热处理得到的多孔氧化铝其孔结构优于多数有机模板法合成的氧化铝,并表现出优异的吸附性能.本研究为合成二维勃姆石纳米片和多孔氧化铝材料提供了一种新策略.

关键词：多孔氧化铝纳米片模板合成勃姆石水热处理层间作用插层硅掺杂

Effect of inlet volute wrap angle on the flow field and performance of double inlet gas cyclones

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颗粒学报:英文版 2023年第6期77卷 29-36页

作者： Zetao wang Guogang Sun zhengyuan Song Shiwei Yuan zhen Qian College of Mechanical and Transportation Engineering China University of PetroleumBeijing102249China state key laboratory of heavy oil processing China University of PetroleumBeijing102249China

In response to the divergent understanding of double inlet cyclone performance in the literature,the effect of inlet volute wrap angle on the performance and flow field of double inlet cyclone separator was studied by Computational Fluid Dynamic(CFD)*** results showed that the inlet volute wrap angle can affect the comparison results of the single and double inlet gas cyclones with the same total inlet cross-sectional area and velocity.0°and 90°volute double inlet improved the efficiency mainly by separating particles below 10μm,while 180°volute double inlet had no separation advantage for any particles,so the symmetrical double inlet does not always improve the efficiency,and the appropriate inlet volute wrap angle should be selected according to the actual situation,otherwise,the expected performance requirements of the symmetrical double inlet cyclone cannot be *** with the flow field,it is found that the inlet volute wrap angle changed the tangential velocity of the sym-metrical double inlet cyclone separator,thus changing the performance.

关键词： Cyclone separator Inlet volutewrapangle Efficiency Pressure drop Double inlet

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微波辅助裂解废塑料研究进展

工业催化 2024年第10期32卷 22-32页

作者：寇宗岚安柳李人杰赵震沈阳师范大学化学化工学院能源与环境催化研究所辽宁沈阳110034 中国石油大学(北京)理学院重质油国家重点实验室北京102249

塑料给人类生活带来便利的同时也造成严重的环境污染,化石能源的枯竭也迫使走上可持续发展之路。废弃塑料的高价值回收是解决目前能源匮乏和环境污染的有效途径。塑料垃圾回收的方法有化学法、能源回收及再生法等。化学回收中微波辅助... 详细信息

塑料给人类生活带来便利的同时也造成严重的环境污染,化石能源的枯竭也迫使走上可持续发展之路。废弃塑料的高价值回收是解决目前能源匮乏和环境污染的有效途径。塑料垃圾回收的方法有化学法、能源回收及再生法等。化学回收中微波辅助裂解法利用电场与聚合物分子间的特殊相互作用,在塑料热解应用中具有潜在优势。综述了微波辅助热解(MAP)塑料以获取液态油、气及其它高附加值产物的研究现状。针对不同种类废塑料,分析了微波处理参数、微波吸收剂特性、催化剂作用等,并结合微波裂解塑料制油的工艺方法对裂解产物分布和品质的影响因素展开讨论。

关键词：三废处理与综合利用微波辅助废弃塑料裂解催化剂燃料工艺方法