| 李翠华,朱起明.新型CuCl／Hβ沸石羰基化催化剂的制备与原位红外光谱表征[J].分子催化,1999,(2):115-120 |
| 新型CuCl／Hβ沸石羰基化催化剂的制备与原位红外光谱表征 |
| Preparation and Characterization of New CuCl/H Catalysts |
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| DOI： |
| 中文关键词: Hβ沸石 氯化亚铜 沸石 羰基化 催化剂 |
| 英文关键词:Solid\|state ion exchange, CuCl, Zeolite, Monolayer dispersion CuCl/H systems with CO adsorbed showed that the intensity of the bands at 2152 and 2157 cm-1 increase with increasing CuCl ratio, more Cu+ ions are located at Ssites. The carbonyls, |
| 基金项目:国家自然科学基金 |
| 李翠华 朱起明 |
| [1]汕头大学 [2]清华大学 |
| 摘要点击次数: 1368 |
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| 中文摘要: |
| 采用固态离子交换法在沸石中直接引进Ｃｕ（Ⅰ）活性中心，ＣｕＣｌ分子在Ｈβ沸石中与Ｈ＾＋交换和在沸石内表面单层分散两个过程同时发生，负载阈值为２１．２％（ＣｕＣｌ％），调节ＣｕＣｌ和Ｈβ的配比，可得到从桥羟基被部分交换到所有羟基被完全交换的ＣｕＣｌ／Ｈβ从化剂。 |
| 英文摘要: |
| CuCl can be directly exchanged and highly dispersed into zeolite H without formation of Cu2+ by solid\|state ion exchange method at 573 K, 1.0 10-3 Pa for 24 h. CuCl/H systems with different CuCl ratio were prepared; the critical monolayer dispersion capacity into H of CuCl was 21.2% ( CuCl % ), high dispersion of cuprous chloride molecules can result in more active sites for catalysis and adsorption. From IR in\|situ results, it was found that solid\|state ion exchange process of cuprous ions and dispersion process of cuprous chloride molecules occur simultaneously during solid\|state ion exchange. When the ratio of CuCl is \{0.35% ( CuCl% ),\} ion\|exchange of Cu+ predominated and the intensity of the -OH at 3597 cm-1 band decreases, Cu+ ions are mainly located at SI sites. In contrast, when the ratio of CuCl is 5% and 15%, the bands at 3597, 3635, 3740 cm-1 disappear totally. The XRD results indicated that all CuCl molecules are in monolayer dispersion. The IR spectra of |
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