Hydrolysis of sucrose by dealuminated Y-zeolites

Q4 Chemical Engineering 分子催化 Pub Date : 1994-12-15 DOI:10.1016/0304-5102(94)00158-8
Christoph Buttersack, Daniela Laketic
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引用次数: 33

Abstract

Hydrolysis of surcose by protonated Y-zeolites was shown to be strongly accelerate by delumination. Two or less protons per unit cell provide a maximal rate constant per acid site. The rate constant is the same compared to diluted homogenous acid solution. Hydrophobic interactions essentially contribute to the adsorption of the sucrose molecule but not to the energy of the activated transition state. It was proved that the zeolite pores are able to include a sucrose molecule in addition to at least one water molecule. Because of the limited space inside the zeolite pore, a change of conformation compared with the state in solution is reqired.

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脱铝y型沸石对蔗糖的水解
质子化y型沸石对蔗糖的水解在光照作用下明显加快。每个细胞两个或更少的质子提供每个酸位点的最大速率常数。与稀均酸溶液相比,反应速率常数相同。疏水相互作用基本上有助于蔗糖分子的吸附,而不是激活过渡态的能量。结果表明,沸石孔除含有至少一个水分子外,还能含有一个蔗糖分子。由于沸石孔内空间有限,因此需要改变溶液中的构象。
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来源期刊
分子催化
分子催化 Chemical Engineering-Catalysis
CiteScore
1.50
自引率
0.00%
发文量
2959
期刊介绍:
期刊最新文献
Author index Subject index Hydrolysis of sucrose by dealuminated Y-zeolites Synthesis and application of organophilic polystyrene-montmorillonite supported onium salts in organic reactions Effect of the reduction temperature on the selectivity of the high temperature reaction of acetone and hydrogen over alumina and titania supported nickel and cobalt catalysts
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