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| H2,CO和H2/CO在ZrO2催化剂上吸附行为研究 | |
| 引用本文： | 吴贵升,陈小平,任杰,孙予罕. H2,CO和H2/CO在ZrO2催化剂上吸附行为研究[J]. 高等学校化学学报, 2000, 21(9): 1448-1450 |
| 作者姓名： | 吴贵升 陈小平 任杰 孙予罕 |
| 作者单位： | 中国科学院山西煤炭化学研究所煤转化国家重点实验室, 太原 030001 |
| 基金项目： | 中国科学院资助项目，29873064， |
| 摘 要： | 用insituFTIR法研究了H2、CO及CO/H2在ZrO2表面的吸附行为.结果表明,H2在ZrO2表面吸附存在两种形态的羟基(即ZrOH和ZrOHZr),吸附温度增加,羟基数量增加.CO在200℃易与ZrO2表面羟基作用形成甲酸盐物种,吸附温度升高时,该物种逐渐分解生成CO和ZrOH.当CO和H2共存时,表面甲酸盐的量明显增加,并随温度增加,逐渐加氢形成甲氧基,最后生成甲烷.甲氧基的加氢过程较慢,所需反应温度也较高,被认为是CO加氢合成醇的速控步骤. |
| 关 键 词： | in situ FTIR H2 CO 吸附行为 |
| 收稿时间： | 1999-11-19 |
Studies of Adsorbed Species of CO, H2 and CO/H2 over ZrO2 |
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| WU Gui-Sheng,CHEN Xiao-Ping,REN Jie,SUN Yu-Han. Studies of Adsorbed Species of CO, H2 and CO/H2 over ZrO2[J]. Chemical Research In Chinese Universities, 2000, 21(9): 1448-1450 | |
| Authors: | WU Gui-Sheng CHEN Xiao-Ping REN Jie SUN Yu-Han |
| Affiliation: | State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China |
| Abstract: | The adsorption of CO, H2 and CO/H2 on ZrO2 was investigated by in situ FTIR. H2 species adsorbed over ZrO2 produced two bands at 3780 and 3680 cm-1, corresponding to ZrOHZr and ZrOH, respectively. COadsorbed on ZrO2 formed formate species at 200 ℃, which slowly decomposed to COwith the rise of adsorption temperature. The formate over ZrO2 could be hydrogenated into methoxide species and methane in H2. As a result, the hydrogenation of methoxide, which proceeded slowly relatively, seemed to be the rate-determining step. |
| Keywords: | in situ FTIR H_2 CO Adsorption |
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