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丙烷在负载型V_2O_5/Zr_3(PO_4)_4催化剂上的氧化脱氢
(《应用化学》编辑部, 1999-03)
[中文摘要]制备了无定型的磷酸锆Ｚｒ３（ＰＯ４）４载体，采用浸渍法在载体上负载0.６％～６.０％的Ｖ２Ｏ５．所制备的催化剂在丙烷氧化脱氢反应中具有较好的催化性能，如３.０％Ｖ２Ｏ５／Ｚｒ３（ＰＯ４）４催化剂在丙烷转化率为１７.０％时，丙烯选择性可达５３.8％，丙烯收率达９.１％．考察了不同反应条件下催化剂的性能．ＸＲＤ、ＩＲ和Ｒａｍａｎ光谱表明，Ｖ２Ｏ５在Ｚｒ３（ＰＯ４）４载体上主要是以高度分散的钒氧物种存在；ＥＳＲ分析结果证明催化剂中 ...
The effect of MoO3 in Ag-Mo-P-O catalysts on oxidative dehydrogenation of propane
(PEKING UNIV PRESS, 2002)
A series of AMP catalysts with different composition were prepared. These catalysts have been characterized by XRD, H-2-TPR, XPS, EPR, NH3-DRIFT, decomposition of isopropanol reaction. The catalytic performance of oxidative ...
Dynamic structure of Mo-O species in Ag-Mo-P-O catalyst for oxidative dehydrogenation of propane
(CHINESE CHEMICAL SOCIETY, 2002)
The dynamic structure of Mo-O species in Ag-Mo-P-O catalyst was studied by in situ confocal microprobe laser Raman spectroscopy (LRS) and catalytic test. The results indicate Mo-O species of MoO3 transformed to Mo-O species ...
Studies of the V2O5/MPO4 (M = Al, Zr, Ca) catalysts in propane oxidative dehydrogenation
(HIGHER EDUCATION PRESS, 1999)
The supports of MPO4 (M = Al, Zr, Ca) were prepared and 0.6 % similar to 6.0%V2O5 was supported on them. The catalysts are effective in the oxidative dehydrogenation of propane. The selectivity of C3H6 over the catalysts ...
Dynamic structure of Mo-O species in Ag-Mo-P-O catalyst for oxidative dehydrogenation of propane
(SCIENCE CHINA PRESS, 2002)
In order to understand the relationship between catalytic performance and structure of Ag-Mo-P-O caalyst for oxidative dehydrogenation of propane, the dynamic structure of Mo-O species in the catalyst was studied by in-situ ...
The active phase and support effect on V2O5/Y2O3 catalysts for propane oxidative dehydrogenation
(ELSEVIER SCIENCE BV, 1999-03-26)
The V2O5/Y2O3 catalysts were prepared and characterized. The performance of the catalysts in propane oxidative dehydrogenation was examined. The active phase of the catalysts is YVO4. The effects of Y2O3 and V2O5 in the ...
CeF_3分解制备CeO_2/CeF_3催化剂的丙烷氧化脱氢性能
(2014-7-28)
通过分解条件的控制从CEf3制备CEO2/CEf3催化剂.X-射线衍射(Xrd)、rAMAn、低能离子散射谱(lEIS)对制备得到的催化剂进行表征和定量估算,发现CEO2覆盖在CEf3上,随着焙烧温度的升高,CEf3催化剂由外而内分解程度加大.CEf3制备的CEO2/CEf3催化剂的丙烷氧化脱氢(OdHP)性能显著优于CEO2,CEO2覆盖层厚度的增加导致表面f/O摩尔比下降,f-隔离活性位的作用减弱,丙烯选择性由56.3%降低到42. ...
负载型V_2O_5/AlPO_4催化剂在丙烷氧化脱氢中的催化作用
(1998)
采用浸渍法在自制的无定型磷酸铝AlPO4载体上负载0.6%~6.0%的V2O5，所制的催化剂在丙烷氧化脱氢反应中具有较好的催化性能，如3.0%V2O5/AlPO4催化剂在丙烷转化率为14.2%时，丙烯选择性可达49.1%，丙烯收率达7.0%。考察了不同反应条件下催化剂的性能，Xrd、Ir和rAMAn光谱表明，V2O5在AlPO4上主要是以高度分散的钒氧物种存在；ESr结果证明催化剂中存在V4＋物种，暗示V5＋/V4＋氧化还原偶参与了氧化还原反应。
酸碱性和氧化还原性对负载型钒基催化剂丙烷氧化脱氢性能的影响
(1998)
用Xrd、rAMAn、TPr和Py-Ir表征乙酰丙酮络钒法制备的不同氧化物和磷酸盐负载的钒氧化物催化剂，结果表明，钒氧化物在载体MgO、Al2O3、Mg3（PO4）2、AlPO4和zr3（PO4）4上是高分散的，没有生成明显的V2O5晶相；催化剂的可还原性与相应载体氧化物或磷酸盐的金属还原电位序有较好的对应关系，同时与其丙烷氧化脱氢活性也存在较好的平行关系，表明钒氧化物与载体的阳离子形成V-O-M桥键，该桥键氧较易移去，可能是丙烷氧化脱 ...