文献类型：期刊文献

中文题名：La_2O_3对合成异丁醛催化剂V_2O_5的催化性能的影响

英文题名：Effect of La_2O_3 on V_2O_5 Catalyst for Isobutyraldehyde Synthesis

作者：胡虹[1];孟璇[1];施力[1]

机构：[1]华东理工大学化工学院,上海200237

年份：2007

卷号：32

期号：2

起止页码：19

中文期刊名：天然气化工—C1化学与化工

外文期刊名：Natural Gas Chemical Industry

收录：CSTPCD;;北大核心:【北大核心2004】；CSCD:【CSCD_E2011_2012】；

语种：中文

中文关键词：La2O3;V2O3;异丁醛;合成;甲醇;乙醇

外文关键词：lanthanum oxide; vanadic oxide; isobutyraldehede ; synthesis; methanol; ethanol

摘要：研究了La2O3对甲醇乙醇一步催化合成异丁醛催化剂V2O5的催化性能的影响。实验结果表明,La2O3的添加量(质量分数)为10%时La2O3/V2O5活性最佳,在反应温度375℃,常压,体积空速2h-1,原料甲乙醇的摩尔比为3∶1时,乙醇转化率达96.62%,异丁醛选择性达61.76%。对反应前后的催化剂进行的XRD测试结果表明,反应过程中V2O5还原为V2O3,部分La2O3也发生了晶形的变化,由立方体晶体(A型)变为了六方体形晶体(C型)。对V2O5和La2O3/V2O5反应后失活催化剂进行的TG-DTA实验结果表明,La2O3可降低失活催化剂的再生温度,有利于失活催化剂的再生。
The effect of La2O3 on the catalytic behaviours of V2O5 catalyst for isobutyraldehede （IBA） synthesis from methanol and ethanol in one-step was studied. The results showed that the La2O/V2O5 with 10% La2O3 （mass） had the best activity, and ethanol conversion and IBA selectivity reached to 96. 62% and 61.76%, respectively, at the conditions of reaction temperature 375℃, atmospheric pressure, space velocity 2h^-1 , and feed mole ratio of methanol to ethanol 3： 1. XRD results of the freshed and deactivated catalysts showed that V205 was reduced to V2O3 during reaction and La2O3 crystal transformed from cube （A） to hexahedron （C）. The TG-DTA results of the deactivated V2O5 and La2O3/V2O5 catalysts showed that La2O3 additive could reduce the regenerating temperature of the deactivated catalyst and was in favor of the regeneration of the catalyst.