摘要
研究不同温度下乙醇在不含Ｓｉ－ＯＨ基团的疏水硅佛石（Ｓｉｌｉｃａｌｉｔｅ－Ⅰ）表面上的吸附等温线及脱附等温线。计算出硅沸石上乙醇的吸附热及脱附活化能分别为４９．４ｋＪ及１４．９ｋＪ／ｍｏｌ。疏水硅沸石吸附剂或硅沸石填充硅橡胶分离膜能有效地从稀乙醇－水的混合液中，或从发酵产生的啤酒中分离、浓缩乙醇。
Adsorption and desorption of EtOH on a sample of silicalite-Ⅰ were studied at differenttemperatures The sample,prepared under a system containing no TPA and withour additionof F￣-,has no Si-OH group on pore surface and has good hydrophobic properties. The adsor-ption heat and active energy of desorption as calculated from isotherms of adsorptionanddesorption, are 49.4kJ/mol and 14.9kJ/mol respectively.A column filled with an adsorbentof hydrophobic silicalite and 20wt%binder,or silicone rubber membrane filled with 30wt%of hydrophobic silicalite can be used to separate EtOH efficiently from EtOH-H_2O solution.
出处
《石油化工》
CAS
CSCD
北大核心
1994年第6期356-358,共3页
Petrochemical Technology
基金
国家自然科学基金
关键词
吸附
分离
硅沸石
沸石
疏水性
adsorption and separation,hydrophobic silicalite-Ⅰ,EtOH-H_2O,adsorptionheat,active energy of desorption
