期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到28篇文章
< 1 2 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Preparation,characterization and catalytic properties of S_2O_82-/ZrO_2-CeO_2 solid superacid catalyst 认领 引用 被引量：34
1
作者 樊国栋 沈茂 +1 位作者 张昭 贾发瑞 《Journal of Rare Earths》 SCIE EI CAS 2009年第3期437-442,共6页
A novel solid superacid catalyst S2O8^2-/ZrO2-CeO2 was prepared by a coprecipitation method and characterized by means of XRD FTIR, BET, TEM and DSC/TG analysis methods. The results indicated that incorporation of app... A novel solid superacid catalyst S2O8^2-/ZrO2-CeO2 was prepared by a coprecipitation method and characterized by means of XRD FTIR, BET, TEM and DSC/TG analysis methods. The results indicated that incorporation of appropriate amounts of Ce into the catalyst was beneficial to the formation of sole tetragonal ZrO2 and effectively prevented from the formation of monoclinic ZrO〉 and restrained the loss of sulfated species. XRD revealed the presence of tetragonal Ce0.16Zr0.84O2phase in the case of S2O8^2-/ZrO2-CeO2 calcined above 500 ℃. Catalytic activities of S2O8^2-/ZrO2-CeO2 for the esterification of lactic acid with n-butanol was studied. The results showed that the optimum conditions were as follows： calcination temperature of the catalyst 600 ℃, n（lactic acid）：n（n-butyl alcohol）=1.0：3.0, w（S2O8^2-/ZrO2- CeO2）=12.0%, reaction temperature 145 ℃, and reaction time 2 h. The esterification efficiency of lactic acid was about 96.6%. 展开更多
关键词 solid superacid catalyst S2O8^2-/ZrO2-CeO2 n-butyl lactate esterification rare earths
暂未订购 下载PDF
Highly selective CO methanation over amorphous Ni-Ru-B/ZrO2catalyst 认领 引用 被引量：15
2
作者 Qi Hai Liu Xin Fa Dong Wei Ming Lin 《Chinese Chemical Letters》 SCIE CAS 2009年第8期889-892,共4页
Amorphous Ni-Ru-B/ZrO2 catalyst was prepared by the means of chemical reduction,and selective CO methanation as a strategy for CO removal in fuel processing applications was investigated over the amorphous Ni-Ru-B/ZrO... Amorphous Ni-Ru-B/ZrO2 catalyst was prepared by the means of chemical reduction,and selective CO methanation as a strategy for CO removal in fuel processing applications was investigated over the amorphous Ni-Ru-B/ZrO2 catalyst.The result showed that,at the temperature of 210-230℃,the catalyst was shown to be capable of reducing CO in a hydrogen-rich reformate to less than 10 ppm,while keeping the CO2conversion below 1.55%and the hydrogen consumption below 6.50%.?2009 Xin Fa Dong.Published by Elsevier B.V.on behalf of Chinese Chemical Society.All rights reserved. 展开更多
关键词 Selective methanation CO Amorphous Ni-Ru-B/ZrO2 catalyst
暂未订购 下载PDF
Effect of ZrO_2 Crystalline Phase on the Performance of Ni-B/ZrO_2 Catalyst for the CO Selective Methanation 认领 引用 被引量：8
3
作者 刘其海 廖列文 +1 位作者 刘自力 董新法 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第3期434-438,共5页
Amorphous Ni-B/ZrO2 catalysts were prepared by coprecipitation-chemical reduction with KBH4 aqueous solution,and various crystalline phase ZrO2(amorphous-ZrO2,tetragonal-ZrO2 and monoclinic-ZrO2) supported Ni-B cataly... Amorphous Ni-B/ZrO2 catalysts were prepared by coprecipitation-chemical reduction with KBH4 aqueous solution,and various crystalline phase ZrO2(amorphous-ZrO2,tetragonal-ZrO2 and monoclinic-ZrO2) supported Ni-B catalysts were obtained by thermal treatment in 5%H2-N2 stream at different temperature.The effect of ZrO2 polymorphs and the treatment temperature on the catalytic performance for the CO selective methanation were investigated,and the catalysts were characterized by N2 physisorption,Powder X-ray diffraction(XRD), Temperature-Programmed Desorption(CO-TPD and H2-TPD),and Differential Scanning Calorimeter(DSC).The treatment temperature affected strongly the crystalline structure of ZrO2,and the CO methanation activity and selectivity of the Ni-B/ZrO2 catalysts were significantly influenced by the crystalline phase of ZrO2.Of the three forms of ZrO2 polymorphs(amorphou-ZrO2,tetragonal-ZrO2 and monoclinic-ZrO2),the amorphous-ZrO2 supported nickle catalyst showed highest CO methanation activity,attributing in large part to the largest specific surface area and the optimum CO/H2 absorption intensity of the Ni-B/amorphous-ZrO2 catalyst. 展开更多
关键词 crystalline phase carbon monoxide selective methanation Ni-B/ZrO2 catalyst
暂未订购 下载PDF
Selective catalytic methanation of CO in hydrogen-rich gases over Ni/ZrO2catalyst 认领 引用 被引量：26
4
作者 Qihai Liu Xinfa Dong +1 位作者 Xinman Mo Weiming Lin 《Journal of Natural Gas Chemistry》 2008年第3期268-272,共5页
Ni/ZrO2 catalysts were prepared by the incipient-wetness impregnation method and were investigated in activity and selectivity for the selective catalytic methanation of CO in hydrogen-rich gases with more than 20 vol... Ni/ZrO2 catalysts were prepared by the incipient-wetness impregnation method and were investigated in activity and selectivity for the selective catalytic methanation of CO in hydrogen-rich gases with more than 20 vol%CO2.The result showed that Ni loadings significantly influenced the performance of Ni/ZrO2 catalyst.The 1.6 wt%Ni loading catalyst exhibited the highest catalytic activity among all the catalysts in the selective methanation of CO in hydrogen-rich gas.The outlet concentration of CO was less than 20 ppm with the hydrogen consumption below 7%,at a gas-hourly-space velocity as high as 10000 h-1 and a temperature range of 260°C to 280°C.The X-ray diffraction(XRD)and temperature programmed reduction(TPR)measurements showed that NiO was dispersed thoroughly on the surface of ZrO2 support if Ni loading was under 1.6 wt%.When Ni loading was increased to 3 wt%or above,the free bulk NiO species began to assemble,which was not favorable to increase the selectivity of the catalyst. 展开更多
关键词 selective methanation CO removal Ni/ZrO2 catalyst hydrogen-rich gases fuel cell
暂未订购 下载PDF
Synthesis of Biodiesel Using ZrO_2 Polycrystalline Ceramic Foam Catalyst in a Tubular Reactor 认领 引用 被引量：3
5
作者 Wang Yunpu Fan Liangliang +5 位作者 Dai Leilei Liu Yuhuan Ruan Roger Liu Shitao Zhang Xueqin Wan Yiqin 《China Petroleum Processing & Petrochemical Technology》 CAS 2015年第3期67-75,共9页
With the help of the ceramic foam research efforts and preparation techniques, the ZrO2 polycrystalline ceramic foam catalyst was synthesized, and its characteristics, including the crystal structure, the phase compos... With the help of the ceramic foam research efforts and preparation techniques, the ZrO2 polycrystalline ceramic foam catalyst was synthesized, and its characteristics, including the crystal structure, the phase composition, the acid–base properties, and the microstructure, were analyzed by XRD, SEM, Py-IR, and BET techniques. The performance of the ZrO2 polycrystalline ceramic foam catalyst in a tubular reactor was investigated via biodiesel synthesis using S. wilsoniana oil and methanol. The effects of reaction conditions(i.e., reaction temperature, reaction pressure, and volume ratio of methanol to S. wilsoniana oil) on transesterification efficiency were investigated, and the reaction conditions were optimized using RSM. The optimum reaction temperature, reaction pressure, and volume ratio of methanol to S. wilsoniana oil were determined to be 290 ℃, 10 MPa, and 4:1, respectively. Under this condition, the FAME content in the product oil reached 98.38%. The performance of the ZrO2 polycrystalline ceramic foam catalyst synthesized in this work for biodiesel synthesis from S. wilsoniana oil with a moisture content of 7.1% and an acid value of 130.697 mg KOH/g was examined, and the FAME content in the product oil was found to be 93% and 97.67%, respectively. The FAME content in the product oil exceeded 97% after five consecutive cycles(12 h per cycle of use) of the catalyst. The proposed catalyst represents a new type of solid catalyst with excellent acid resistance, water resistance, esterification efficiency, and catalytic stability. 展开更多
关键词 ZrO2 polycrystalline ceramic foam catalyst tubular reactor S. wilsoniana oil biodiesel
暂未订购 下载PDF
Study on the Nanosized Amorphous Ru-Fe-B/ZrO_2 Alloy Catalyst for Benzene Selective Hydrogenation to Cyclohexene 认领 引用 被引量：14
6
作者 Shouchang Liu Zhongyi Liu Shuhui Zhao Yongmei Wu Zheng Wang Peng Yuan 《Journal of Natural Gas Chemistry》 2006年第4期319-326,共8页
A novel nanosized amorphous Ru-Fe-B/ZrO2 alloy catalyst for benzene selective hydrogenation to cyclohexene was investigated. The superior properties of this catalyst were attributed to the combination of the nanosize ... A novel nanosized amorphous Ru-Fe-B/ZrO2 alloy catalyst for benzene selective hydrogenation to cyclohexene was investigated. The superior properties of this catalyst were attributed to the combination of the nanosize and the amorphous character as well as to its textural character. In addition, the concentration of zinc ions, the content of ZrO2 in the slurry, and the pretreatment of the catalyst were found to be effective in improving the activity and the selectivity of the catalyst. 展开更多
关键词 Ru-Fe-B/ZrO2 amorphous catalyst benzene selective hydrogenation cyclohexene
暂未订购 下载PDF
纳米ZrO_2负载Pd-Ni催化剂催化氯苯加氢脱氯性能研究 认领 引用 被引量：5
7
作者 沈常美 高强 +2 位作者 丁培培 刘红 菅盘铭 《工业催化》 CAS 2005年第8期60-63,共4页
采用负载法制备了一系列纳米ZrO2负载金属Ni、Pd催化剂,通过XRD、TEM和SEM等技术对催化剂进行了表征,并以氯苯的加氢脱氯为探针反应,考察了催化剂的加氢脱氯性能和反应温度、碱的用量、催化剂镍的含量等因素对催化活性的影响。结果发现,... 采用负载法制备了一系列纳米ZrO2负载金属Ni、Pd催化剂,通过XRD、TEM和SEM等技术对催化剂进行了表征,并以氯苯的加氢脱氯为探针反应,考察了催化剂的加氢脱氯性能和反应温度、碱的用量、催化剂镍的含量等因素对催化活性的影响。结果发现,在80℃、NaOH和氯苯物质的量的比为1的反应条件下,Ni质量分数为10%和Pd为0.05%的Pd-Ni/ZrO2催化剂效果最佳,反应9 h后氯苯的转化率可达到100%。 展开更多
关键词 氯苯 加氢脱氯 Pd-Ni/ZrO2催化剂
暂未订购 下载PDF
Catalytic combustion of methane over nano ZrO_2-supported copper-based catalysts 认领 引用 被引量：7
8
作者 Fen Fen Qua Wei Chu +2 位作者 Li Min Shi Mu Hua Chen Jin Yan Hu 《Chinese Chemical Letters》 SCIE CAS 2007年第8期993-996,共4页
The nano ZrO2-supported copper-based catalysts for methane combustion were investigated by means of N2 adsorption, TEM, XRD, H2-TPR techniques and the test of methane oxidation. Two kinds of ZrO2 were used as support,... The nano ZrO2-supported copper-based catalysts for methane combustion were investigated by means of N2 adsorption, TEM, XRD, H2-TPR techniques and the test of methane oxidation. Two kinds of ZrO2 were used as support, one （ZrO2-1） was obtained from the commercial ZrO2 and the other （ZrO2-2） was issued from the thermal decomposition of zirconium nitrate. It was found that the CuO/ZrO2-2 catalyst was more active than CuO/ZrO2-1. N2 adsorption, H2-TPR and XRD measurements showed that larger surface area, better reduction property, presence of tetragonal ZrO2 and higher dispersion of active component for CuO/ZrO2-2 than that of CuO/ZrO2-1. These factors could be the dominating reasons for its higher activity for methane combustion. 展开更多
关键词 Nano ZrO2 Copper-based catalysts Catalytic combustion Methane
暂未订购 下载PDF
ZrO_2-modified Ni/LaAl11O18 catalyst for CO methanation: Effects of catalyst structure on catalytic performance 认领 引用 被引量：4
9
作者 Hongmei Ai Hongyuan Yang +3 位作者 Qing Liu Guoming Zhao Jing Yang Fangna Gu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第2期297-308,共12页
We report Ni/LaHA@ZrO2catalysts prepared by a facile modified successive adsorption and reaction method for CO methanation.N2adsorption,X‐ray diffraction,transmission electron microscopy,scanning electron microscopy,... We report Ni/LaHA@ZrO2catalysts prepared by a facile modified successive adsorption and reaction method for CO methanation.N2adsorption,X‐ray diffraction,transmission electron microscopy,scanning electron microscopy,thermogravimetric analysis,H2temperature‐programmed reduction,H2temperature‐programmed desorption,X‐ray photoelectron spectroscopy,thermogravimetric analysis,and inductively coupled plasma atomic emission spectrometry were used to characterize the samples.The results indicated that the ZrO2nanoparticles were distributed over the surface of the Ni/LaHA@ZrO2catalyst and even partially covered some Ni particles,resulting in the coating exerting a confinement effect.The excess ZrO2had an adverse effect on the enhancement of CO conversion because of the coverage of the surface Ni particles;however,the Ni/LaHA@ZrO2catalyst displayed much higher CH4selectivity than Ni/LaHA because of the activation of the byproduct CO2molecules by ZrO2species.Therefore,even though20Ni/LaHA@ZrO2‐5exhibited similar CO conversion as20Ni/LaHA,the use of the former resulted in a higher CH4yield than the use of the latter.A107‐h‐lifetime test revealed that the Ni/LaHA@ZrO2catalyst was highly stable with superior anti‐sintering and anti‐coking properties because of its coating structure and the promoter effect of ZrO2. 展开更多
关键词 Lanthanum hexaaluminate ZrO2 Nickel catalyst Coating structure CO methanation
暂未订购 下载PDF
Selective CO methanation over amorphous Ni-Ru-B/ZrO_2 catalyst for hydrogen-rich gas purification 认领 引用 被引量：6
10
作者 Qihai Liu Zili Liu +1 位作者 LieWen Liao Xinfa Dong 《Journal of Natural Gas Chemistry》 2010年第5期497-502,共6页
Amorphous Ni-Ru-B/ZrO2 catalysts were prepared by chemical reduction method. The effects of Ni-Ru-B loading and Ru/Ni mole ratio on the catalytic performance for selective CO methanation from reformed fuel were studie... Amorphous Ni-Ru-B/ZrO2 catalysts were prepared by chemical reduction method. The effects of Ni-Ru-B loading and Ru/Ni mole ratio on the catalytic performance for selective CO methanation from reformed fuel were studied, and the catalysts were characterized by BET, ICP, XRD and TPD. The results showed that Ru strongly affected the catalytic activity and selectivity by increasing the thermal stability of amorphous structure, promoting the dispersion of the catalyst particle, and intensifying the CO adsorption. For the catalysts with Ru/Ni mole ratio under 0.15, the CO methanation conversion and selectivity increased significantly with the increasing Ru/Ni mole ratio. Among all the catalysts investigated, the 30 wt% Ni-Ru-B loading amorphous Ni61Ru9B30/ZrO2 catalyst with 0.15 Ru/Ni mole ratio presented the best catalytic performance, over which higher than 99.9% of CO conversion was obtained in the temperature range of 230℃-250℃, and the CO2 conversion was kept under the level of 0.9%. 展开更多
关键词 selective methanation CO hydrogen purification amorphous Ni-Ru-B/ZrO2 catalyst
暂未订购 下载PDF
Hydrogen production by glycerol reforming in supercritical water over Ni/MgO-ZrO_2 catalyst 认领 引用 被引量：1
11
作者 Qihai Liu Liewen Liao +1 位作者 Zili Liu Xinfa Dong 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2013年第4期665-670,共6页
Nano ZrO2 and MgO-ZrO2 were prepared by a self-assembly route and were employed as the support for Ni catalysts used in hydrogen production from glycerol reforming in supercritical water （SCW）. The reforming experim... Nano ZrO2 and MgO-ZrO2 were prepared by a self-assembly route and were employed as the support for Ni catalysts used in hydrogen production from glycerol reforming in supercritical water （SCW）. The reforming experiments were conducted in a tubular fixed-bed flow reactor over a temperature range of 600-800 ℃. The influences of process variables such as temperature, contact time, and water to glycerol ratio on hydrogen yield were investigated and the catalysts were charactered by ICP, BET, XRD and SEM. The results showed that high hydrogen yield was obtained from glycerol by reforming in supercritical water over the Ni/MgO-ZrO2 catalysts in a short contact time. The MgO in the catalyst showed significant promotion effect for hydrogen production likely due to the formation of the alkaline active site. Even when the glycerol feed concentration was up to 45 wt%, glycerol was completely gasified and transfered to the gas products containing hydrogen, carbon dioxide, and methane along with small amounts of carbon monoxide. At a diluted feed concentration of 5 wt%, near theoretical yield of 7 mole of H2/mol of glycerol could be obtained. 展开更多
关键词 hydrogen production glycerol remforming supercritical water MgO modification Ni/ZrO2 catalysts
暂未订购 下载PDF
γ-Al2O3Supported SO42-/ZrO2Solid Superacid Catalysts for n-Pentane Isomerization 认领 引用 被引量：2
12
作者 Li Zhao Xiaoshuang Cheng +2 位作者 Ye Hu Shuqing Ma Yingjun Wang 《Modern Research in Catalysis》 2014年第3期89-93,共5页
A solid superacid catalyst Pt-SO42-/ZrO2-A12O3 for n-pentane isomerization, was prepared by incipient-wetness impregnation. Preparetion conditions, namely, calcination temperature, concentration of sulfuric acid solut... A solid superacid catalyst Pt-SO42-/ZrO2-A12O3 for n-pentane isomerization, was prepared by incipient-wetness impregnation. Preparetion conditions, namely, calcination temperature, concentration of sulfuric acid solution used in impregnation and Al2O3 concentration, were varied to investigate the effects on catalytic performance of Pt-SO42-/ZrO2-A12O3. The results showed that the PtSZA catalyst exhibited excellent catalytic performance for n-pentane isomerization. Under optimized preparation conditions of calcination temperature of 650°C, reaction time for 3 h, concentration of sulfuric acid solution for 0.5 mol/L, 30% of Al2O3 concentration and 0.3% of Pt concentration, the n-pentane conversion and isopentane selectivity of Pt-SO42-/ZrO2-A12O3 could reach up to 62.17% and 91.60%, respectively. 展开更多
关键词 SO42-/ZrO2 n-Pentane Isomerization γ-Al2O3 Supported Superacid Catalysts
暂未订购 下载PDF
ESR STUDY OF ZrO2 CATALYST 认领 引用
13
《Chinese Chemical Letters》 SCIE CAS 1995年第8期723-726,共4页
The intensity of the signal(g=1.974)resulted from Zr+ ion on the surface or ZrO2 catalyst, increased with the calcination temperature and time, but that or the signal (g=2.003)resulted from F+s centers (surface oxygen... The intensity of the signal(g=1.974)resulted from Zr+ ion on the surface or ZrO2 catalyst, increased with the calcination temperature and time, but that or the signal (g=2.003)resulted from F+s centers (surface oxygen ion vacancies with a single trapped electron) decreased and finally disappeared at 550℃. 展开更多
关键词 ESR STUDY OF ZrO2 CATALYST
暂未订购 下载PDF
Improving the denitration performance and K-poisoning resistance of the V_2O_5-WO_3/TiO_2 catalyst by Ce4+ and Zr4+ co-doping 认领 引用 被引量：22
14
作者 Jun Cao Xiaojiang Yao +4 位作者 Fumo Yang Li Chen Min Fu Changjin Tang Lin Dong 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第1期95-104,共10页
A series of V2O5‐WO3/TiO2‐ZrO2,V2O5‐WO3/TiO2‐CeO2,and V2O5‐WO3/TiO2‐CeO2‐ZrO2 catalysts were synthesized to improve the selective catalytic reduction(SCR)performance and the K‐poisoning resistance of a V2O5‐W... A series of V2O5‐WO3/TiO2‐ZrO2,V2O5‐WO3/TiO2‐CeO2,and V2O5‐WO3/TiO2‐CeO2‐ZrO2 catalysts were synthesized to improve the selective catalytic reduction(SCR)performance and the K‐poisoning resistance of a V2O5‐WO3/TiO2 catalyst.The physicochemical properties were investigated by using XRD,BET,NH3‐TPD,H2‐TPR,and XPS,and the catalytic performance and K‐poisoning resistance were evaluated via a NH3‐SCR model reaction.Ce^4+and Zr^4+co‐doping were found to enhance the conversion of NOx,and exhibit the best K‐poisoning resistance owing to the largest BET‐specific surface area,pore volume,and total acid site concentration,as well as the minimal effects on the surface acidity and redox ability from K poisoning.The V2O5‐WO3/TiO2‐CeO2‐ZrO2 catalyst also presents outstanding H2O+SO2 tolerance.Finally,the in situ DRIFTS reveals that the NH3‐SCR reaction over the V2O5‐WO3/TiO2‐CeO2‐ZrO2 catalyst follows an L‐H mechanism,and that K poisoning does not change the reaction mechanism. 展开更多
关键词 V2O5‐WO3/TiO2‐CeO2‐ZrO2 catalyst Co‐doping K‐poisoning NH3‐SCR Reaction mechanism
暂未订购 下载PDF
Catalytic Synthesis of Isopropyl Benzene over SO_4 2-/ZrO_ 2-MCM-41 认领 引用 被引量：1
15
作者 WEI Chang-ping LI Shu-zeng +2 位作者 ZHOU Bin PENG Chun-jia ZHEN Kai-ji 《Chemical Research in Chinese Universities》 SCIE EI CAS 2006年第3期371-374,共4页
Super acid catalyst SO4^2-/ZrO2 was introduced into pure silicone MCM-41 via the impregnation method and the catalyst samples obtained at different temperatures were characterized by means of XRD, IR, and Py-IR techni... Super acid catalyst SO4^2-/ZrO2 was introduced into pure silicone MCM-41 via the impregnation method and the catalyst samples obtained at different temperatures were characterized by means of XRD, IR, and Py-IR techniques. The selectively catalytic gas-phase flow reactions of benzene with propene over the catalyst samples were carried out in a made-to-measure high-pressure flow reactor equipped with a thermostat and a condenser. Effect of the preparative condition on the catalytic synthesis of isopropyl benzene over the catalyst samples was tested. The results show that SO4^2-/ZrO2-MCM-41 （ SZM-41 ） can be used as a catalyst for the title reaction, in which there are a higher conversion （97%） for the propene and a higher selectivity（93% ） for the isopropyl benzene. 展开更多
关键词 Benzene Propene Isopropyl benzene SO4^2-/ZrO2-MCM-41 catalyst
暂未订购 下载PDF
Au/ZrO_2催化剂中ZrO_2的尺寸效应:1,3-丁二烯加氢反应 认领 引用 被引量：5
16
作者 张鑫 徐柏庆 《高等学校化学学报》 SCIE EI CAS 北大核心 2005年第1期106-110,共5页
在不同温度 (673～ 1 0 73 K)下 ,于流动 N2 气中焙烧 Zr O(OH) 2 醇 (乙醇 )凝胶 ,制备了不同尺寸的Zr O2 -AN纳米晶 (6～ 3 0 nm) .采用沉积 -沉淀方法制备了相应的质量分数为 0 .7%的 Au/Zr O2 -AN催化剂 .用 XRD,XRF,TEM/HRTEM,EDS,... 在不同温度 (673～ 1 0 73 K)下 ,于流动 N2 气中焙烧 Zr O(OH) 2 醇 (乙醇 )凝胶 ,制备了不同尺寸的Zr O2 -AN纳米晶 (6～ 3 0 nm) .采用沉积 -沉淀方法制备了相应的质量分数为 0 .7%的 Au/Zr O2 -AN催化剂 .用 XRD,XRF,TEM/HRTEM,EDS,N2 吸附和 1 ,3 -丁二烯加氢反应对 Zr O2 -AN和 Au/Zr O2 -AN催化剂进行了表征 .结果表明 ,在所有的 Au/Zr O2 -AN样品中 ,Au粒子的平均尺寸为 4～ 5 nm,Zr O2 -AN的颗粒大小没有因为负载 Au粒子而发生改变 . 1 ,3 -丁二烯在 Au/Zr O2 -AN催化剂催化下能以 1 0 0 %的选择性进行加氢反应生成单烯烃 .随着 Au/Zr O2 -AN催化剂中 Zr O2 -AN纳米晶尺寸的增加或“载体”焙烧温度的升高 ,1 ,3 -丁二烯的转化率明显降低 ;1 -丁烯的选择性先增加后减小 ,2 -丁烯中反 /顺异构体的摩尔比在 0 .5～ 1 .0的范围内逐渐增大 ,TEM/HRTEM表征结果清楚地表明 ,Au/Zr O2 -AN催化剂中 Au粒子与 Zr O2 -AN颗粒接触界面 /周边随 Zr O2 -AN颗粒尺寸的减小而明显增加 ,这很可能是含有更小尺寸 Zr O2 -AN纳米粒子的Au/Zr O2 -AN催化剂具有更高的催化活性的重要原因 . 展开更多
关键词 Au/ZrO2催化剂 1,3-丁二烯加氢反应 纳米ZrO2 尺寸效应 多相催化
暂未订购 下载PDF
Synthesis of Biomorphic ZrO2-CeO2 Nanostructures by Silkworm Silk Template 认领 引用 被引量：1
17
作者 张宗见 李嘉 +2 位作者 孙富升 吴恒亮 邝丰栾 《Chinese Journal of Chemical Physics》 SCIE EI CAS 2010年第3期351-354,I0002,共4页
A simple and green technique has been developed to prepare hierarchical biomorphic ZrO2- CeO2, using silkworm silk as the template. Different from traditional immersion technics, the whole synthesis process depends mo... A simple and green technique has been developed to prepare hierarchical biomorphic ZrO2- CeO2, using silkworm silk as the template. Different from traditional immersion technics, the whole synthesis process depends more on the restriction or direction functions of the silkworm silk template. The analytic results showed that ZrO2-CeO2 exhibited a well-crystallized hierarchically interwoven hollow fiber structure with 16-28 μm in diameter. The grain size of the sample calcined at 800 ℃ was about 14 nm. Consequently, the interwoven meshwork at three dimensions is formed due to the direction of biotemplate. The action mechanism is summarily discussed here. It may bring the biomorphic ZrO2-CeO2 nanomaterials with hierarchical interwoven structures to more applications, such as catalysts. 展开更多
关键词 Nanomaterial Catalyst ZrO2-CeO2 Biomorphic Silkworm silk template
暂未订购 下载PDF
TiO_2-ZrO_2制备条件对B_2O_3/TiO_2-ZrO_2催化环己酮肟气相Beckmann重排反应的影响 认领 引用 被引量：2
18
作者 毛东森 陈庆龄 卢冠忠 《石油化工》 EI CAS 北大核心 2002年第10期783-786,共4页
考察了载体TiO2 -ZrO2 的制备条件对B2 O3/TiO2 -ZrO2 催化环己酮肟气相Beckmann重排反应性能的影响 ,确定较佳的制备条件 :分别以四氯化钛和氧氯化锆为钛源和锆源 ,采用反滴法将原料慢慢地滴加到沉淀剂氨水溶液中 ,沉淀终点的pH等于 9 ... 考察了载体TiO2 -ZrO2 的制备条件对B2 O3/TiO2 -ZrO2 催化环己酮肟气相Beckmann重排反应性能的影响 ,确定较佳的制备条件 :分别以四氯化钛和氧氯化锆为钛源和锆源 ,采用反滴法将原料慢慢地滴加到沉淀剂氨水溶液中 ,沉淀终点的pH等于 9 0 ,沉淀的老化温度 2 5℃ ,焙烧温度 5 0 0℃。环己酮肟的转化率和己内酰胺的选择性分别高达 99 7%和 97 0 %。 展开更多
关键词 B2O3/TiO2-ZrO2催化剂 环己酮肟 气相Beckmann重排反应 制备条件
暂未订购 下载PDF
复合固体超强酸催化剂SO_42--MoO_3-ZrO_2 的研究——Ⅱ . 酯化催化性能的研究 认领 引用 被引量：1
19
作者 黄碧纯 黄仲涛 《华南理工大学学报（自然科学版）》 EI CAS 北大核心 1997年第8期121-126,共6页
以乙酸和丁醇的酯化为探针反应，着重考察了制备条件对SO2－4MoO3ZrO2超强酸催化剂催化活性的影响；考察了催化剂的使用寿命。结果表明，MoO3含量和焙烧温度对催化活性有显著影响，而H2SO4浓度对催化活性的影响却不明显；催化剂具... 以乙酸和丁醇的酯化为探针反应，着重考察了制备条件对SO2－4MoO3ZrO2超强酸催化剂催化活性的影响；考察了催化剂的使用寿命。结果表明，MoO3含量和焙烧温度对催化活性有显著影响，而H2SO4浓度对催化活性的影响却不明显；催化剂具有较好的稳定性及使用寿命。另外，用XRD、FTIR等分析方法对催化剂进行了物性测试。 展开更多
关键词 SO_42--MoO_3-ZrO_2 固体超强酸 酯化 催化剂 活性
暂未订购 下载PDF
制备条件对固体超强酸SO_42-/ZrO_2性质的影响 认领 引用 被引量：2
20
作者 房永征 杨俊和 +3 位作者 金鸣林 范雷方 刘英 郭峰 《上海应用技术学院学报（自然科学版）》 2003年第3期172-175,共4页
较详细地研究了固体超强酸催化剂制备条件与催化剂性质的影响。试验发现制备固体超强酸酸浓度和焙烧温度对催化剂的硫含量、酸强度、形态结构和晶相转变都有影响。
关键词 固体超强酸 SO4^2-/ZrO2制备 催化剂性质
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈