无水氨基酸类离子液体-聚乙二醇混合溶剂吸收CO2的动力学

doi:10.16085/j.issn.1000-6613.2017-0862

化工进展 ›› 2018, Vol. 37 ›› Issue (02): 789-795.DOI: 10.16085/j.issn.1000-6613.2017-0862

无水氨基酸类离子液体-聚乙二醇混合溶剂吸收CO₂的动力学

李骏^1,2, 何文军¹, 宗弘元¹, 漆志文², 杨为民¹

1 中国石化上海石油化工研究院, 绿色化工与工业催化国家重点实验室, 上海 201208;
2 华东理工大学化工学院, 化学工程联合国家重点实验室, 上海 200237

收稿日期:2017-05-10 修回日期:2017-08-24 出版日期:2018-02-05 发布日期:2018-02-05
通讯作者: 杨为民,博士,教授级高级工程师,主要从事分子筛催化剂和烷基化反应的研究。
作者简介:李骏(1988-),男,博士,研究方向为化工分离过程及CO₂捕集。E-mail:ljsmail@163.com。

CO₂ absorption kinetic study based on non-aqueous mixed solvent system of amino acid ionic liquids with polyethylene glycol as solvent

LI Jun^1,2, HE Wenjun¹, ZONG Hongyuan¹, QI Zhiwen², YANG Weimin¹

1 SINOPEC Shanghai Research Institute of Petrochemical Technology, State Key Laboratory of Green Chemical Engineering and Catalysis, Shanghai 201208, China;
2 School of Chemical Engineering, East China University of Science and Technology, State Key Laboratory of Chemical Engineering, Shanghai 200237, China

Received:2017-05-10 Revised:2017-08-24 Online:2018-02-05 Published:2018-02-05

摘要/Abstract

摘要： 以聚乙二醇400（PEG400）为溶剂，氨基酸类离子液体（AAILs）作为化学吸收剂的混合体系具有蒸汽压极低、热稳定性好、黏度和再生能耗低、CO₂吸收量和选择性高等优点，适用于燃烧前CO₂捕集过程的高温高压吸收条件。本文采用压降法，测定了以四正丁基膦（[P₄₄₄₄]⁺）为阳离子，甘氨酸（Gly）、丙氨酸（Ala）和脯氨酸（Pro）作为阴离子的3种氨基酸类离子液体的混合溶剂体系对CO₂的吸收速率，并建立了该无水体系的CO₂吸收动力学模型。对于反应速率而言，在333.15K时，[P₄₄₄₄][Gly]-PEG400 > [P₄₄₄₄][Pro]-PEG400 > [P₄₄₄₄][Ala]-PEG400，温度升高至373.15K时，[P₄₄₄₄][Pro]-PEG400 > [P4444][Gly]-PEG400 > [P₄₄₄₄][Ala]-PEG400；根据相关吸收动力学参数，推测出CO₂在AAILs-PEG400中的反应均为快反应。通过研究其吸收动力学，获得了关键的吸收动力学数据，为后续的工业开发设计提供基础数据和设计依据。

关键词: 离子液体, 二氧化碳, 聚乙二醇, 吸收, 动力学

Abstract: The non-aqueous mixed solvent system based on amino acid ionic liquids(AAILs) and polyethylene glycol 400(PEG400) shows many advantages, such as extremely low vapor pressure, good thermal stability, low viscosity and regeneration energy, high CO₂ capacity and selectivity, which is suitable for the pre-combustion process facing high absorption temperature and pressure conditions. The CO₂ absorption rates for three kinds of AAILs with tetrabutylphosphonium ([P4444]⁺) as cation, glycine(Gly), alanine(Ala), proline(Pro) as anions in PEG400 were determined by pressure drop method, and then the relevant absorption kinetic model was developed. The absorption rate were ranked as[P₄₄₄₄] [Gly]-PEG400 > [P₄₄₄₄] [Pro]-PEG400 > [P₄₄₄₄] [Ala]-PEG400 at 333.15K and[P₄₄₄₄] [Pro]-PEG400 > [P₄₄₄₄] [Gly]-PEG400 > [P₄₄₄₄] [Ala]-PEG400 at 373.15K. According to the absorption kinetic results, the CO₂ absorption by AAIL-PEG400 system was fast reaction. Based on the absorption model, the key kinetic parameters were obtained, providing the basic data and principle of design for the coming industrial development and process design.

Key words: ionic liquid, carbon dioxide, polyethylene glycol, absorption, kinetics

中图分类号:

TQ028.1⁺7

李骏, 何文军, 宗弘元, 漆志文, 杨为民. 无水氨基酸类离子液体-聚乙二醇混合溶剂吸收CO₂的动力学[J]. 化工进展, 2018, 37(02): 789-795.

LI Jun, HE Wenjun, ZONG Hongyuan, QI Zhiwen, YANG Weimin. CO₂ absorption kinetic study based on non-aqueous mixed solvent system of amino acid ionic liquids with polyethylene glycol as solvent[J]. Chemical Industry and Engineering Progress, 2018, 37(02): 789-795.

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无水氨基酸类离子液体-聚乙二醇混合溶剂吸收CO₂的动力学

CO₂ absorption kinetic study based on non-aqueous mixed solvent system of amino acid ionic liquids with polyethylene glycol as solvent

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