A comparative esterification of benzyl alcohol with acetic acid over zeolites Hβ, HY and HZSM5
A comparative esterification of benzyl alcohol with acetic acid over zeolites Hβ, HY and HZSM5
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DOI：
10.1016/j.apcata.2004.03.016
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发表时间：
2004-10
影响因子：
5.5
通讯作者：
S. Kirumakki;N. Nagaraju;S. Narayanan
中科院分区：
文献类型：
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作者：
S. Kirumakki;N. Nagaraju;S. Narayanan
本文研究了苯甲醇与乙酸在Hβ、HY和HZSM-5分子筛上的酯化反应。在Hβ和HY沸石中，除了生成预期产物乙酸苄酯外，还生成二苄醚。在不存在催化剂的情况下，并且在沸石HZSM 5上，仅形成酯。负责反应的酸性位点主要在沸石的孔内。孔结构似乎影响产物的选择性。动力学研究表明，酯化反应遵循Eley-Rideal机理。反应活化能的大小顺序为：Hβ <HZSM 5 < HY < Blank。
The esterification of benzyl alcohol with acetic acid has been studied over zeolites Hβ, HY, and HZSM5. In the case of zeolites Hβ and HY, apart from the expected product benzyl acetate, dibenzyl ether was also formed. In the absence of a catalyst and also over zeolite HZSM5 only the ester was formed. Acidic sites responsible for the reaction are predominantly inside the pores of the zeolites. The pore architecture seems to influence the product selectivity. Kinetic studies have shown that the esterification reaction follows the Eley–Rideal mechanism. The energy of activation for the reaction follows the order: Hβ < HZSM5 < HY < Blank.