H2O对Cu+/S2O82-/γ-Al2O3催化剂合成碳酸二甲酯性能的影响

郑华艳; 刘媛媛; 董睿敏; 孟凡会; 李忠

H₂O对Cu⁺/S₂O₈^2-/γ-Al₂O₃催化剂合成碳酸二甲酯性能的影响

太原理工大学煤科学与技术教育部和山西省重点实验室, 山西太原 030024

基金项目: 国家自然科学基金(20976113, 20936003); 山西省归国留学基金(20100038)。

详细信息

通讯作者:
李忠,Tel:0351-6018526,E-mail:lizhong@tyut.edu.cn。

中图分类号: O643
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出版历程
- 收稿日期: 2012-04-27
- 修回日期: 2012-06-05
- 刊出日期: 2013-01-31

Effects of water on catalytic performance of Cu⁺/S₂O₈^2-/γ-Al₂O₃ for oxidative carbonylation of methanol to dimethyl carbonate

Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technolgy, Taiyuan 030024, China

摘要

摘要: 反应温度120℃、压力3.0 MPa的条件下,考察了H₂O对浆态床DMC合成催化剂Cu⁺/S₂O₈^2-/γ-Al₂O₃活性的影响。结果表明,外界H₂O的引入加剧了催化剂的失活速率。对引入H₂O后回收催化剂进行了元素分析、XRD、DTG、Py-FT-IR和NH₃-TPD等表征,结果表明,H₂O的引入加速了催化剂中活性组分Cu的流失速率,生成更多没有催化甲醇氧化羰基化活性的Cu₂(OH)₃Cl晶体,加剧了催化剂的失活。
- 失活 /
- Cu⁺/S₂O₈^2-/&gamma /
- -Al₂O₃ /
- 浆态床 /
- DMC
Abstract: Effects of H₂O on the catalyst Cu⁺/S₂O₈^2-/γ-Al₂O₃ of DMC synthesis in slurry reactor were investigated under the conditions of 120℃ and 3.0 MPa. The results showed that the introduction of water into reaction system led to quick catalyst deactivation. The catalysts were characterized by the Elemental Analysis, XRD, DTG, Py-FT-IR and NH₃-TPD. The results showed that active component Cu and CuCl, loading on the surface of S₂O₈^2-/γ-Al₂O₃ support, reacted with O₂ and H₂O, then formed Cu₂(OH)₃Cl which was essentially inactive for oxidative carbonylation of methanol to dimethyl carbonate. The catalyst deactivation rate speeded up with increasing water injection.
- deactivation /
- Cu⁺/S₂O₈^2-/&gamma /
- -Al₂O₃ /
- slurry /
- DMC

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参考文献(19)

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