检索结果-南通市图书馆

Journal of Energy Chemistry 2015年第1期24卷 101-107页

作者： deren fang Jinbo Zhao Wanjun Li Xu fang Xin Yang Wanzhong Ren Huimin Zhang Provincial Key Lab of Chemical Manufacture Engineering Yantai University

Deactivation mechanism of Cr-Al2O3catalyst and the interaction of Cr-A1 in the dehydrogenation of isobutane, as well as the nature of the catalytic active center, were studied using XRD, SEM, XPS, H2-TPR, isobutane-TPR and TPO techniques. The results revealed that the deactivation of Cr-Al2O3 catalyst was mainly caused by carbon deposition on its surface. The Cr3＋ ion could not be reduced by hydrogen but could be reduced to Cr2＋ by hydrocarbons and monoxide carbon. The active center for isobutane dehydrogenation could be Cr2＋/Cr3＋ produced from Cr6＋ by the on line reduction of hydrocarbon and carbon monoxide. The binding energy of Al3＋ was strongly affected by the state of chromium cations in the catalysts.

关键词： isobutane dehydrogenation Cr/Al2O3 deactivation active center catalyst

Partial amination of cationic exchange resins and its application in the hydration of butene

在线全文

学校读者我要写书评

暂无评论

Journal of Natural Gas Chemistry 2012年第3期21卷 314-318页

作者： deren fang Wanzhong Ren] Hongying Lu Hongtao Yang Provincial Key Lab of Chemical Manufacture Engineering Yantai UniversityYantai 264005ShangdongChina Institute of Applied Catalysis of Yantai University Yantai 264005ShandongChina

In this work, the amination of sulfonated polystyrene resin with alkyl secondary amine is investigated. The catalytic activities of the modified resins are determined through the hydration of l-butene. The optimum chain length and the best range of amination rate are determined. It is found that the single-pass conversion of 1 -butene was raised 2% on average, and the relative activity was increased over 30% after modification. A hypothesis about the enhancement of catalytic activities by the inclusion of alkyl chain to wrap up the butene molecule is proposed.

关键词： amination sulfonated polystyrene resin butene hydration catalytic activity mechanism inclusion

Influence of Reaction Conditions on Methanol Synthesis and WGS Reaction in the Syngas-to-DME Process

在线全文

学校读者我要写书评

暂无评论

Journal of Natural Gas Chemistry 2006年第1期15卷 38-44页

作者： Ligang Wang deren fang Xingyun Huang Shigang Zhang Yue Qi Zhongmin Liu Dalian fastitute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China Graduate School of Chinese Academy of Sciences Beijing 100039 China Institute of Applied Catalysis Yantai University Yantai 264005 China

A series of CuO-ZnO catalysts （with different Cu/Zn molar ratios） were prepared, and evaluated under the reaction conditions of syngas-to-dimethyl ether （DME） with three sorts of feed gas and different space velocity. The catalysts were characterized by X-ray diffraction （XRD） and temperatureprogrammed reduction （TPR）. The experiment results showed that the reaction conditions of syngas-to- DME process greatly affected the methanol synthesis and WGS reaction. The influence caused by Cu/Zn molar ratio was quite different on the two reactions; increasing of percentage of CO2 in feed gas was unfavorable for catalyst activity, and also inhibited both reactions; enhancement of reaction space velocity heavily influenced the performance of the catalyst, and the benefits were relatively less for methanol synthesis than for the WGS reaction.

关键词： copper zinc Cu/Zn molar ratio methanol dimethyl ether water gas shift reaction syngas dehydration

Synthesis and applications of mesoporous Cu-Zn-Al_2O_3 catalyst for dehydrogenation of 2-butanol

在线全文

学校读者我要写书评

暂无评论

Journal of Natural Gas Chemistry 2009年第2期18卷 179-182页

作者： deren fang Wanzhong Ren Zhongmin Liu Xiufeng Xu Lei Xu Hongying Lǔ Weiping Liao Huimin Zhang Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China Institute of Applied Catalysis of Yantai University Yantai 264005 Shandong China

A series of mesoporous Cu-Zn-Al2O3 materials have been synthesized at ambient temperature and their structure was characterized by XRD, N2 physical adsorption and TPR techniques. Their catalytic applications for the dehydrogenation of 2-butanol to methyl ethyl ketone （MEK） were evaluated in a fixed-bed flow reactor at atmospheric pressure. It is demonstrated from the XRD patterns that both the as-synthesized samples and calcined samples have the typical XRD patterns of meso-structured materials and the results of N20 chemical adsorption showed that Cu was embedded in the framework of the mesoporous materials and homogeneously dispersed in the mesoporous Cu-Zn-Al2O3 materials. The catalytic activity of 2-butanol dehydrogenation was varied in the order of CZA（10）〈 CZA（CP）〈 CZA（20）〈 CZA（30）; while the selectivity of MEK was increased in the order of CZA（CP）〈 CZA（10）〈 CZA（20）〈CZA（30）.

关键词： Cu-Zn-Al2O3 mesoporous materials dehydrogenation of 2-butanol catalyst

Relationship between Cr-Al Interaction and the Performance of Cr-Al<sub>2</sub>O<sub>3 </sub>Catalysts for Isobutane Dehydrogenation

在线全文

学校读者我要写书评

暂无评论

Modern Research in Catalysis 2015年第2期4卷 50-58页

作者： deren fang Jinbo Zhao Shang Liu Limei Zhang Wanzhong Ren Huimin Zhang Engineering Center of Petrochemical Light Hydrocarbon Comprehensive Utilization of Shandong Province Yantai University Yantai China

A series of catalysts were prepared using the kneading molding method and the impregnation method as well as the dry mix method by using different raw materials. By using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and temperature-programmed reduction (TPR) techniques, we studied the relationship between the catalyst performance and the Cr-Al interaction in the catalytic dehydrogenation of isobutane. The results demonstrated that the Cr-Al interaction in the catalyst had a direct influence on the catalytic activity and the selectivity of isobutene. The catalysts prepared using the kneading molding method had higher catalytic activity and isobutene selectivity than those prepared using the dry mix method. By comparison, XRD, XPS, and TPR results showed that the greater the Cr-Al interaction in the catalyst was, the higher the catalytic activity was. Here, we propose a mechanism of isobutane dehydrogenation.

关键词： Isobutane Dehydrogenation Cr/Al2O3 Cr-Al Interaction Catalyst Mechanism

Catalytic hydrodechlorination of 4-chlorophenol and denitration from waste water over a series of Pd-In/γ-Al2O3 bimetallic catalysts

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Catalytic hydrodechlorination of 4-chlorophenol and denitrat...

双清一号(珞珈三号01星)多模式成像样例数据集

第九届全国环境催化与环境材料学术会议——助力两型社会快...

作者： Jinbo Zhao deren fang Yuanming Zhang Yan Tai University

＜正＞Nowadays,about the chlorophenols and nitrate nitrogen compounds has aroused wide concern for environmental pollution.[1,2]Supported Pd-In bimetallic catalyst has important scientific significance and great potential value for the hydrodechlorination（HDC）and denitration in waste water at the same time.[3]In this paper,we do the research about HDC and denitration in waste water,study the effect of catalyst composition and preparation method on the properties of

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

电子与信息学报 2024年第6期46卷 2299-2310页

作者：王密杨芳李德仁潘俊戴荣凡武汉大学测绘遥感信息工程国家重点实验室武汉430079 航天东方红卫星有限公司北京100094

针对当前多数高分辨遥感卫星面向用户服务存在获取数据种类单一问题,该文公开了双清一号(珞珈三号01星)多模式成像样例数据集,涵盖了面阵推扫、面阵推帧和视频凝视等多种成像模式,包含城市、水体、山区、机场等不同目标区域的典型数据... 详细信息

针对当前多数高分辨遥感卫星面向用户服务存在获取数据种类单一问题,该文公开了双清一号(珞珈三号01星)多模式成像样例数据集,涵盖了面阵推扫、面阵推帧和视频凝视等多种成像模式,包含城市、水体、山区、机场等不同目标区域的典型数据样本。该数据集由信号数据解码、Bayer插值、相对辐射校正、几何定位、视频稳像和3维重建等步骤处理构建;同时,对在轨定标、兴趣区产品快速生产、高清视频几何稳像和多角度3维重建等关键算法做了深入探讨和研究。最后,对样本数据集从图像标准产品、凝视视频产品和实景3维产品等3个方面进行了可视化展示和定量化精度评价。

关键词：双清一号多模式成像视频稳像 3维重建

Cu^+/13X分子筛吸附分离丁烷-丁烯混合体系

在线全文

学校读者我要写书评

暂无评论

石油化工 2015年第6期44卷 724-728页

作者：秦玉武房德仁任万忠烟台大学山东省石化轻烃综合利用工程技术中心山东烟台264005

采用等体积浸渍法制备了一系列负载型Cu+/13X分子筛吸附剂,利用固定床吸附装置对该系列吸附剂分离丁烷-丁烯混合体系的性能进行了评价,考察了吸附剂中Cu Cl2负载量、焙烧还原时间、吸附温度、吸附压力、再生次数等对吸附剂性能的影响,... 详细信息

采用等体积浸渍法制备了一系列负载型Cu+/13X分子筛吸附剂,利用固定床吸附装置对该系列吸附剂分离丁烷-丁烯混合体系的性能进行了评价,考察了吸附剂中Cu Cl2负载量、焙烧还原时间、吸附温度、吸附压力、再生次数等对吸附剂性能的影响,并采用TPD方法分析了碳四组分与活性中心π-络合能力的强弱。实验结果表明,Cu+/13X分子筛吸附剂是一种分离丁烷-丁烯混合体系的优良吸附剂,当Cu Cl2负载量为5.67%(w)、350℃下焙烧1.00 h、吸附温度为35~40℃时,常压下吸附效果最佳。升高吸附压力使吸附剂的穿透吸附时间缩短,且吸附压力过高时会引起吸附柱死体积内的气体体积增加,不利于分离。Cu+/13X分子筛吸附剂的再生性能良好,多次再生后仍保持较高的活性。

关键词：丁烷丁烯 Cu^+/13X分子筛吸附分离混合碳四 π-络合

Pt(Pd)/Hβ催化剂催化正丁烷异构化反应特性的研究

在线全文

学校读者我要写书评

暂无评论

石油化工 2011年第10期40卷 1052-1056页

作者：王智艳房德仁刘波任万忠烟台大学化工制造工程山东省高校重点实验室山东烟台264005

用等体积浸渍法制备了Pt/Hβ和Pd/Hβ催化剂,采用高压连续微反装置在反应温度300～500℃、反应压力2.0 MPa、氢与烃的摩尔比3.0、液态空速1.25 h-1的条件下考察了催化剂催化正丁烷异构化反应的性能;采用N2吸附-脱附和SEM方法对催化剂进... 详细信息

用等体积浸渍法制备了Pt/Hβ和Pd/Hβ催化剂,采用高压连续微反装置在反应温度300～500℃、反应压力2.0 MPa、氢与烃的摩尔比3.0、液态空速1.25 h-1的条件下考察了催化剂催化正丁烷异构化反应的性能;采用N2吸附-脱附和SEM方法对催化剂进行了表征。实验结果表明,反应温度为350℃时,Pd/Hβ催化剂的性能优于Pt/Hβ催化剂;反应温度为400℃时,后者的性能优于前者。反应温度为400℃时,Pt/Hβ催化剂的适宜Pt负载量为0.6%(w),此时正丁烷转化率为65.6%,异丁烷选择性为55.6%;Pd/Hβ催化剂的适宜Pd负载量为0.3%(w),此时正丁烷转化率为64.6%,异丁烷选择性为44.8%。考察了助剂对Pt/Hβ和Pd/Hβ催化剂性能的影响,添加Cu,Sn,Zn的催化剂性能良好。

关键词：正丁烷异构化铂/Hβ 钯/Hβ 双功能催化剂

混合丁烷在Cr/Al_2O_3催化剂上的脱氢性能

在线全文

学校读者我要写书评

暂无评论

石油化工 2015年第12期44卷 1461-1466页

作者：张梨梅房德仁任万忠刘尚烟台大学山东省石化轻烃综合利用工程技术中心山东烟台264005

以Cr/Al_2O_3为催化剂催化混合丁烷脱氢,采用SEM技术对催化剂进行表征,考察了反应温度和液时空速对混合丁烷脱氢性能的影响,并分析了正丁烷脱氢反应的产物分布。表征结果显示,Cr/Al_2O_3具有较好的球形形态,粒径36~135μm。实验结果表明... 详细信息

以Cr/Al_2O_3为催化剂催化混合丁烷脱氢,采用SEM技术对催化剂进行表征,考察了反应温度和液时空速对混合丁烷脱氢性能的影响,并分析了正丁烷脱氢反应的产物分布。表征结果显示,Cr/Al_2O_3具有较好的球形形态,粒径36~135μm。实验结果表明,Cr/Al_2O_3对混合丁烷脱氢具有较高的催化活性,在反应温度540℃、液时空速2.5 h^(-1)时,100%(w)正丁烷的转化率达30%以上,正丁烯选择性接近80%;在反应温度540℃、液时空速2.5 h^(-1)时,混合丁烷中正丁烷含量(w)为40%~100%时的转化率达30%以上,丁烯选择性达90%以上;在反应温度540~560℃、液时空速2.0~2.5 h^(-1)时,混合丁烷中正丁烷含量低于40%(w)时的转化率为33%~45%,丁烯选择性达90%以上。正丁烷脱氢反应产物中反丁烯的选择性最高,顺丁烯次之,1-丁烯最低。

关键词：铬/氧化铝催化剂混合丁烷脱氢丁烯