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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
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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
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Preparation,characterization and catalytic properties of S_2O_82-/ZrO_2-CeO_2 solid superacid catalyst 认领 引用 被引量：34
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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
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Highly selective CO methanation over amorphous Ni-Ru-B/ZrO2catalyst 认领 引用 被引量：15
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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
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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
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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
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WO_3/ZrO_2固体超强酸改性及在酯化反应中应用研究 认领 引用 被引量：4
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作者 张存 刘涛 +3 位作者 王洪娟 王峰 潘小玉 刘晓勤 《高校化学工程学报》 EI CAS CSCD 北大核心 2012年第6期983-988,共6页
为进一步提高WO3/ZrO2固体超强酸催化活性和稳定性,采用共沉淀法分别制备Ce和Mn改性WO3/ZrO2催化剂。通过XRD、Raman等方法对改性前后催化剂进行表征,由相应图谱分析Ce和Mn引入对催化剂晶型结构和表面性质的影响;并将改性后催化剂用于... 为进一步提高WO3/ZrO2固体超强酸催化活性和稳定性,采用共沉淀法分别制备Ce和Mn改性WO3/ZrO2催化剂。通过XRD、Raman等方法对改性前后催化剂进行表征,由相应图谱分析Ce和Mn引入对催化剂晶型结构和表面性质的影响;并将改性后催化剂用于丙酸和正丁醇的酯化反应考察其催化性能,同时确定合成丙酸正丁酯的最佳工艺条件。结果表明,Ce或Mn的引入能更好地抑制焙烧时ZrO2晶粒长大,使晶粒粒度更加细化,但是没有改变WO3/ZrO2催化剂的物相结构;与WO3/ZrO2相比,Ce或Mn掺杂后催化剂活性明显提高。 展开更多
关键词 固体超强酸 WO3 ZrO2 锰 铈 酯化反应
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改性WO_3/ZrO_2固体超强酸催化合成乙酰水杨酸 认领 引用 被引量：10
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作者 张存 吴过 +3 位作者 潘小玉 郁美净 金亮 刘晓勤 《四川大学学报（工程科学版）》 CSCD 北大核心 2013年第2期136-141,共6页
采用共沉淀法制备WO3/ZrO2及Ce、Mn改性WO3/ZrO2固体超强酸,通过XRD、Raman等方法对改性前后催化剂进行表征,并将其分别用于乙酰水杨酸合成反应考察催化性能,结果表明Ce改性WO3/ZrO2固体超强酸催化效果最好。以Ce改性WO3/ZrO2固体超强... 采用共沉淀法制备WO3/ZrO2及Ce、Mn改性WO3/ZrO2固体超强酸,通过XRD、Raman等方法对改性前后催化剂进行表征,并将其分别用于乙酰水杨酸合成反应考察催化性能,结果表明Ce改性WO3/ZrO2固体超强酸催化效果最好。以Ce改性WO3/ZrO2固体超强酸作为催化剂对乙酰水杨酸合成工艺进行优化,考察反应时间、反应温度、反应物配比及催化剂用量对酰化反应的影响。最佳反应条件下乙酰水杨酸收率达94.69%,且催化剂回收容易,重复使用多次仍具有较高活性。 展开更多
关键词 改性固体超强酸 WO3 ZrO2催化剂 乙酰水杨酸 乙酰化反应
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WO3/ZrO2催化烷烃异构化反应研究进展 认领 引用 被引量：8
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作者 汪颖军 张海菊 +1 位作者 孙博 田性刚 《石油学报（石油加工）》 EI CAS 北大核心 2009年第2期283-290,共8页
介绍了WO3/ZrO2固体超强酸催化剂几种常用的制备方法,概述了制备条件对WO3/ZrO2结构及其对烷烃异构化催化性能的影响,综述了WO3/ZrO2及改性的WO3/ZrO2固体超强酸催化剂催化烷烃异构化反应的研究进展。结果表明,WO3/ZrO2固体超强酸对烷... 介绍了WO3/ZrO2固体超强酸催化剂几种常用的制备方法,概述了制备条件对WO3/ZrO2结构及其对烷烃异构化催化性能的影响,综述了WO3/ZrO2及改性的WO3/ZrO2固体超强酸催化剂催化烷烃异构化反应的研究进展。结果表明,WO3/ZrO2固体超强酸对烷烃异构化反应具有较好的催化性能,催化剂中WO3含量、焙烧温度及ZrO2晶型是影响催化性能的主要因素。还简要介绍了WO3/ZrO2表面结构,预测了WO3/ZrO2固体超强酸催化剂今后的研究重点。 展开更多
关键词 WO3/ZrO2 固体超强酸 异构化 催化剂
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Selective catalytic methanation of CO in hydrogen-rich gases over Ni/ZrO2catalyst 认领 引用 被引量：26
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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
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Pt/Beta、Pt/SO_42-/ZrO_2和Pt/WO_3/ZrO_2催化剂上的正己烷异构化 认领 引用 被引量：3
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作者 冯延龙 宋月芹 +2 位作者 张娟娟 金亚清 周晓龙 《石油学报（石油加工）》 EI CAS 北大核心 2010年第4期531-537,共7页
通过引入钾(K)的方法调节Beta分子筛的酸性,考察了K负载量对Beta分子筛酸性的影响。制备了Pt/Beta、Pt/SO42-/ZrO2与Pt/WO3/ZrO23种不同类型的催化剂,考察了它们的正己烷异构化催化活性及酸性与孔道结构对其催化活性的影响。结果表明,... 通过引入钾(K)的方法调节Beta分子筛的酸性,考察了K负载量对Beta分子筛酸性的影响。制备了Pt/Beta、Pt/SO42-/ZrO2与Pt/WO3/ZrO23种不同类型的催化剂,考察了它们的正己烷异构化催化活性及酸性与孔道结构对其催化活性的影响。结果表明,催化剂的异构化催化活性与其酸强度和酸量有关,其中酸强度对异构化活性的影响更明显。而异构体产物的分布可能与催化剂的孔道结构及正己烷转化率有关,而与催化剂酸性无直接关联。具有合适孔径的催化剂对多支链烷烃的生成更有利,异构化反应可能是受动力学限制的择形反应。 展开更多
关键词 Pt/Beta Pt/SO42-/ZrO2 Pt/WO3/ZrO2 临氢异构 正己烷
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Activity and hydrothermal stability of CeO_2–ZrO_2–WO_3 for the selective catalytic reduction of NO_x with NH_3 认领 引用 被引量：7
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作者 Zhongxian Song Ping Ning +5 位作者 Qiulin Zhang Hao Li Jinhui Zhang Yancai Wang Xin Liu Zhenzhen Huang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2016年第4期168-177,共10页
A series of CeO2–ZrO2–WO3（CZW）catalysts prepared by a hydrothermal synthesis method showed excellent catalytic activity for selective catalytic reduction（SCR）of NO with NH3 over a wide temperature of 150–550℃.... A series of CeO2–ZrO2–WO3（CZW）catalysts prepared by a hydrothermal synthesis method showed excellent catalytic activity for selective catalytic reduction（SCR）of NO with NH3 over a wide temperature of 150–550℃.The effect of hydrothermal treatment of CZW catalysts on SCR activity was investigated in the presence of 10% H2O.The fresh catalyst showed above 90% NOx conversion at 201–459℃,which is applicable to diesel exhaust NOx purification（200–440℃）.The SCR activity results indicated that hydrothermal aging decreased the SCR activity of CZW at low temperatures（below 300℃）,while the activity was notably enhanced at high temperature（above 450℃）.The aged CZW catalyst（hydrothermal aging at 700℃ for 8 hr）showed almost 80% NOx conversion at 229–550℃,while the V2O5–WO3/TiO2 catalyst presented above 80% NOx conversion at 308–370℃.The effect of structural changes,acidity,and redox properties of CZW on the SCR activity was investigated.The results indicated that the excellent hydrothermal stability of CZW was mainly due to the CeO2–ZrO2 solid solution,amorphous WO3 phase and optimal acidity.In addition,the formation of WO3 clusters increased in size as the hydrothermal aging temperature increased,resulting in the collapse of structure,which could further affect the acidity and redox properties. 展开更多
关键词 CeO2–ZrO2–WO3 Hydrothermal stability Solid solution Acidity
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微乳法与溶剂热法制备WO_3/ZrO_2及其在异丁烷/丁烯烷基化反应中的应用 认领 引用 被引量：6
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作者 蔡建岩 李平 +1 位作者 吕卅 孙闻东 《东北师大学报（自然科学版）》 CAS 北大核心 2007年第3期69-74,共6页
采用4组分微乳液为CTAB/正己烷/水/正戊醇体系,溶剂热法制备了WO3/ZrO2固体酸催化剂,并用X射线粉末分析(XRD)、红外光谱、N2吸附-脱附、透射电镜(TEM)等手段对样品结构进行了表征.TEM、氨程序长温脱附(NH3-TPD)和烷基化反应的测定结果表... 采用4组分微乳液为CTAB/正己烷/水/正戊醇体系,溶剂热法制备了WO3/ZrO2固体酸催化剂,并用X射线粉末分析(XRD)、红外光谱、N2吸附-脱附、透射电镜(TEM)等手段对样品结构进行了表征.TEM、氨程序长温脱附(NH3-TPD)和烷基化反应的测定结果表明:ZrO2纳米粒子呈方形,WO3/ZrO2纳米粒子呈球形;样品在负载WO3后经过焙烧酸量大大增强;烷基化产物中C8的质量分数在70%左右. 展开更多
关键词 微乳法 溶剂热 固体酸 WO3/ZrO2 异丁烷-丁烯烷基化
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镧对WO_3/ZrO_2固体超强酸酸强度和结构的影响 认领 引用 被引量：2
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作者 王敏炜 徐萍 +2 位作者 王健 郑启红 王德勇 《南昌大学学报（工科版）》 CAS 2010年第4期369-371,共3页
通过共沉淀法制备了合适酸强度,比表面积为175.284 3 m2.g-1,最可几孔径在5.99 nm,负载镧的WO3/ZrO2固体超强酸催化剂。用Hammett指示剂法、XRD、N2等温吸附/脱附、DTA等方法考察了负载稀土镧后对催化剂的酸强度、比表面积、孔结构和热... 通过共沉淀法制备了合适酸强度,比表面积为175.284 3 m2.g-1,最可几孔径在5.99 nm,负载镧的WO3/ZrO2固体超强酸催化剂。用Hammett指示剂法、XRD、N2等温吸附/脱附、DTA等方法考察了负载稀土镧后对催化剂的酸强度、比表面积、孔结构和热稳定性的影响。结果发现:La能均匀掺入WO3/ZrO2固体超强酸中,且适当加入稀土元素镧不但可以提高其酸强度,而且可以稳定结构、增加比表面积。 展开更多
关键词 镧 WO3/ZrO2 固体酸 酸强度
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Synthesis of Biodiesel Using ZrO_2 Polycrystalline Ceramic Foam Catalyst in a Tubular Reactor 认领 引用 被引量：3
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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
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Synthesis of Biomorphic ZrO2-CeO2 Nanostructures by Silkworm Silk Template 认领 引用 被引量：1
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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
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复合氧化物固体超强酸SO_42-/WO_3-ZrO_2的制备和分析 认领 引用 被引量：2
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作者 韩维涛 孙菲菲 +3 位作者 丁彤 傅翠蓉 杨恩翠 郝金库 《天津化工》 CAS 1999年第2期1-4,共4页
制备系列复合氧化物固体超强酸SO42－／WO3－ZrO2，以流动的Hammet指示剂法测定其酸度。用X射线衍射法、差热－热重法、吸附吡啶IR等方法对其酸强度、物相结构与焙烧温度、钨锆原子比的相关性进行分析。结果表明，SO42－与WO3的加入，... 制备系列复合氧化物固体超强酸SO42－／WO3－ZrO2，以流动的Hammet指示剂法测定其酸度。用X射线衍射法、差热－热重法、吸附吡啶IR等方法对其酸强度、物相结构与焙烧温度、钨锆原子比的相关性进行分析。结果表明，SO42－与WO3的加入，延迟了ZrO2晶化，稳定了介稳的四方晶相，有利于超强酸中心的形成。该超强酸有Lewis和Bronsted两种酸中心。 展开更多
关键词 固体超强酸 SO^2-4 WO3 ZrO2 复合氧化物
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TiO_2-ZrO_2-Bi_2WO_6催化剂的制备及其对苯的降解性能 认领 引用 被引量：1
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作者 徐平 邢焰 吴大旺 《合成化学》 CAS CSCD 北大核心 2014年第3期373-377,共5页
采用共沉淀法,于600℃焙烧合成了催化剂TiO2-ZrO2(Cat600TZ)和Bi2WO6(Cat600BW);于不同温度(T)焙烧合成了系列具有可见光响应的复合催化剂TiO2-ZrO2-Bi2WO6(CatTTZBW),其结构和性能经UV-Vis,FT-IR,XRD,BET和XPS表征。实验结果表明,随T升... 采用共沉淀法,于600℃焙烧合成了催化剂TiO2-ZrO2(Cat600TZ)和Bi2WO6(Cat600BW);于不同温度(T)焙烧合成了系列具有可见光响应的复合催化剂TiO2-ZrO2-Bi2WO6(CatTTZBW),其结构和性能经UV-Vis,FT-IR,XRD,BET和XPS表征。实验结果表明,随T升高,CatTTZBW的比表面积降低,表面羟基含量减小;于600℃焙烧的Cat600TZBW,Bi2WO6与ZrO2-TiO2相互作用较强,有利于其可见光催化活性提高。以苯为降解模型,分别在紫外光和可见光照射下,考察T对CatTTZBW催化活性的影响。实验结果表明,Cat600TZBW的紫外和可见光活性最高,分别为Cat600TZ的7.5倍,Cat600BW的1.5倍。 展开更多
关键词 Bi2WO6 ZrO2-TiO2 催化剂 制备 光催化 苯
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WO_3/ZrO_2固体强酸催化剂上异丁烷/丁烯的烷基化反应Ⅱ.过渡金属的助催化作用 认领 引用 被引量：18
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作者 孙闻东 赵振波 吴越 《催化学报》 2000年第3期229-233,共5页
制备了一系列用过渡金属M (M =Pt,Co ,Ni,Mn ,Fe,Cu)活化的WO3 /ZrO2 固体强酸催化剂 ,用XRD ,DTA TG ,H2 TPR ,NH3 TPD等测定了其晶型结构、表面状态和酸量 .结果表明 ,各样品中的ZrO2 主要以T晶相存在 ,但T晶相ZrO2 所占的比例因过渡... 制备了一系列用过渡金属M (M =Pt,Co ,Ni,Mn ,Fe,Cu)活化的WO3 /ZrO2 固体强酸催化剂 ,用XRD ,DTA TG ,H2 TPR ,NH3 TPD等测定了其晶型结构、表面状态和酸量 .结果表明 ,各样品中的ZrO2 主要以T晶相存在 ,但T晶相ZrO2 所占的比例因过渡金属不同而异 ,比表面积比WO3 /ZrO2 稍有下降 ;金属Pt的引入使呈单层分散的WO3 的表面状态发生了改变 .研究了异丁烷 /丁烯烷基化反应 ,其反应活性与酸量的测定结果有对应关系 ;与WO3 /ZrO2 相比 ,M WO3 /ZrO2 上的丁烯转化率均稍有下降 ,但具有更高的i C08选择性 .从反应机理分析了添加过渡金属无显著效果的原因 . 展开更多
关键词 WO3/ZrO2 固体强酸催化剂 异丁烷 丁烯 烷基化
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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
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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
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固体超强酸WO_3/ZrO_2催化合成乙酸正丁酯 认领 引用 被引量：3
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作者 訾俊峰 《许昌学院学报》 CAS 2012年第5期72-75,共4页
以自制固体超强酸WO3/ZrO2为催化剂,研究了合成乙酸正丁酯的最佳反应条件,实验结果证明:固体超强酸WO3/ZrO2是合成乙酸正丁酯的良好催化剂;其合成的最佳反应条件为:n(冰乙酸):n(正丁醇)=1.0∶1.6,催化剂用量为反应物料总质量的3.8%,在... 以自制固体超强酸WO3/ZrO2为催化剂,研究了合成乙酸正丁酯的最佳反应条件,实验结果证明:固体超强酸WO3/ZrO2是合成乙酸正丁酯的良好催化剂;其合成的最佳反应条件为:n(冰乙酸):n(正丁醇)=1.0∶1.6,催化剂用量为反应物料总质量的3.8%,在回流温度下反应时间为2.0 h,在上述条件下,乙酸正丁酯的酯化率可达97.09%. 展开更多
关键词 乙酸正丁酯 WO3/ZrO2 催化剂
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CTAB辅助下WO_3/ZrO_2复合纳米材料的制备及表征 认领 引用
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作者 曲文福 佟阳 孙闻东 《东北师大学报（自然科学版）》 CAS CSCD 北大核心 2012年第1期103-106,共4页
在十二烷基三甲基溴化铵(CTAB)的辅助下,利用水热法制备了WO3/ZrO2复合氧化物纳米样品,利用XRD、TEM、SAED、N2吸附-脱附等方法对样品的形貌、结构、孔径进行了表征.结果表明:氧化钨被氧化锆包覆煅烧后,团聚成网状结构的纳米粒子,其BET... 在十二烷基三甲基溴化铵(CTAB)的辅助下,利用水热法制备了WO3/ZrO2复合氧化物纳米样品,利用XRD、TEM、SAED、N2吸附-脱附等方法对样品的形貌、结构、孔径进行了表征.结果表明:氧化钨被氧化锆包覆煅烧后,团聚成网状结构的纳米粒子,其BET表面积为368m2/g,平均孔径为5.29nm,孔分布不均匀,无序程度极高. 展开更多
关键词 WO3/ZrO2 复合氧化物 纳米材料 水热法
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