底膜对脱硫用羟乙基纤维素复合膜性能的影响-《郑州大学学报(工学版)》

文章信息/Info

Title:: Effect of bottom membrane on the performance of hydroxyethylcellulose composite membrane for desulfurization

作者:: 渠慧敏; 孔瑛; 张玉忠; 等.; 中国石油大学,华东,重质油国家重点实验室,山东青岛266555, 中国石油大学,华东,重质油国家重点实验室,山东青岛266555;天津工业大学中空纤维膜材料与膜过程教育部重点实验室,天津300160, 天津工业大学中空纤维膜材料与膜过程教育部重点实验室,天津,300160

Keywords:: pervaporation; gasoline desulfurization; Bottom film; mass transfer; Composite film

摘要:: 以聚偏氟乙烯为底膜材料,以羟乙基纤维素(HEC)为活性层材料,通过改变底膜铸膜溶液中添加荆的质量浓度.制备出不同的渗透汽化脱硫用HEC复合膜;用催化裂化汽油评价了复合膜的脱硫性能,并对汽油组分在底膜内的传质进行了简单分析.结果表明.添加剂的质量浓度增加,底膜平均孔径增加,孔隙率却稍有降低,但汽油组分在底膜内的传质系数增加.添加剂的浓度增加,HEC复合膜对硫化物的选择性先增加后降低.渗透性则先降低后增加,在添加荆舍量1%时出现极值.

Abstract:: Polyvinylidene fluoride was used as the base film material and hydroxyethylcellulose (HEC) was used as the active layer material, and the mass concentration of wattle was added to the bottom film casting solution. Different HEC composite membranes for pervaporation desulfurization were prepared; The desulfurization performance of the composite membrane was evaluated by catalytic cracking gasoline, and the mass transfer of gasoline components in the bottom film was simply analyzed. The results show that . The mass concentration of the additive increased, the average pore size of the bottom film increased, but the porosity decreased slightly, but the mass transfer coefficient of the gasoline component in the bottom film increased. The concentration of additives increased, and the selectivity of HEC composite membrane for sulfides first increased and then decreased. The permeability decreases first and then increases, and an extreme value occurs when the amount of wattle is added by 1%.