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Cu-Zn-Al-Zr甲醇合成催化剂的UVDR、TPD和TPR表征
Authors
张鸿斌
方雪明
+5 more
李晨
杨意泉
林仁存
程大典
袁友珠
Publication date
10 December 2001
Publisher
Abstract
在 Cu- Zn- Al甲醇合成催化剂中添加适量的氧化锆助剂 ,制得 Cu- Zn- Al- Zr催化剂及表征其特性 .实验结果表明 ,Cu- Zn- Al- Zr催化剂最佳反应温度为 2 30℃ ,比 Cu- Zn- Al低约 10℃ ;热处理前后甲醇得率分别比 Cu- Zn- Al高 16%和 38% .UVDR表征显示 ,反应后催化剂在 5 98nm处观测到在 Zn O晶格介面上的 Cu+;CO- TPD表征显示 ,经 4 5 0℃热处理后的催化剂只在 182℃~ 197℃处出现一个由 Cu0 位贡献的吸附峰 ,热处理前在 2 61℃~ 2 74℃处由 Cu+位贡献的吸附峰消失 .Cu-Zn- Al- Zr催化剂对 CO的吸附量和 Cu+含量均大于 Cu- Zn- Al催化剂 ,这与该催化剂具有较好的低温活性和较高的热稳定性密切相
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Last time updated on 16/06/2016