超临界CO2法再生油气回收用活性炭机理研究进展

doi:10.16085/j.issn.1000-6613.2020-1227

化工进展 ›› 2020, Vol. 39 ›› Issue (S2): 346-351.DOI: 10.16085/j.issn.1000-6613.2020-1227

超临界CO₂法再生油气回收用活性炭机理研究进展

孙宪航¹(), 朱忠泉², 黄维秋¹(), 浮历沛¹, 王雨雨¹, 吕爱华¹

^1.常州大学江苏省油气储运技术重点实验室，江苏常州 213164
^2.江苏航天惠利特环保科技有限公司，江苏扬中 212200

收稿日期:2020-06-30 出版日期:2020-11-20 发布日期:2020-11-17
通讯作者: 黄维秋
作者简介:孙宪航（1987—），男，博士，讲师，研究方向为油气回收及吸附剂再生。E-mail: sxh1987@cczu.edu.cn。
基金资助:
国家自然科学基金(51574044);江苏省重点研发计划（产业前瞻与共性关键技术）重点项目(BE2018065)

Research progress on the regeneration mechanism of activated carbon for oil vapor recovery under supercritical CO₂

Xianhang SUN¹(), Zhongquan ZHU², Weiqiu HUANG¹(), Lipei FU¹, Yuyu WANG¹, Aihua LYU¹

^1.Jiangsu Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University, Changzhou 213164, Jiangsu, China
^2.Jiangsu Astronautics Hewlett Environmental Protection Technology Co. , Ltd. , Yangzhou 212200, Jiangsu, China

Received:2020-06-30 Online:2020-11-20 Published:2020-11-17
Contact: Weiqiu HUANG

摘要/Abstract

摘要：

储油罐中的原油及汽油等轻质油品在储存或运输过程中，部分轻组分蒸发产生多种对大气有毒、有害的挥发性有机物（VOCs）。在油气回收的终端环节，常采用活性炭对VOCs进行充分吸附达标后排放至大气。对吸附VOCs饱和的活性炭进行脱附再生，既可延长活性炭使用寿命，又可减少固体废弃物处理量。超临界CO₂再生活性炭方法较好地克服了传统的热再生法固有的缺陷，被认为是目前有前途的再生活性炭方法。本文详细阐述了超临界CO₂再生活性炭的机理研究现状，总结了机理研究的关键点及存在的问题，指出了VOCs在超临界CO₂作用下脱附的微观机理及脱附后的VOCs在活性炭中相关传质系数的计算模型为今后机理研究的关键突破口，为超临界CO₂再生活性炭基础理论的进一步完善指明了研究方向。

关键词: 油气回收, 超临界二氧化碳, 活性炭, 再生机理

Abstract:

During the process of storage and transportation of light oil such as crude oil and gasoline in oil tank, some light components evaporate to produce many kinds of volatile organic compounds (VOCs) that are toxic and harmful to the atmosphere. In the terminal of oil vapor recovery, activated carbon is usually used to further absorb volatile organic compound (VOCs) with low concentration to meet the strict VOCs emission standard and high-quality environment requirement. Regeneration of VOCs-saturated activated carbon can not only prolong the life of activated carbon, but also reduce the solid waste treatment charge. Supercritical CO₂ regeneration is considered to be a promising method to regenerate the activated carbon because it overcomes the inherent defects of traditional thermal regeneration methods. In this paper, the regeneration mechanism of activated carbon under supercritical CO₂ is described in detail, and the key points and existing problems of the mechanism research are summarized. It is pointed out that the micro mechanism of VOCs desorption under the supercritical CO₂ and the calculation model of mass transfer coefficient of VOCs in activated carbon after desorption are the key breakthrough of the mechanism research in the future, and it is also the referenced research direction for further improvement of the regeneration theory of activated carbon under supercritical CO₂.

Key words: oil vapor recovery, supercritical CO₂, activated carbon, regeneration mechanism

中图分类号:

TE992.3

孙宪航, 朱忠泉, 黄维秋, 浮历沛, 王雨雨, 吕爱华. 超临界CO₂法再生油气回收用活性炭机理研究进展[J]. 化工进展, 2020, 39(S2): 346-351.

Xianhang SUN, Zhongquan ZHU, Weiqiu HUANG, Lipei FU, Yuyu WANG, Aihua LYU. Research progress on the regeneration mechanism of activated carbon for oil vapor recovery under supercritical CO₂[J]. Chemical Industry and Engineering Progress, 2020, 39(S2): 346-351.

图/表 3

图1 活性炭吸附与再生实验装置1—液态CO2钢瓶；2—VOCs容器；3—球阀；4—CO2增压泵；5—抽吸泵；6—冷凝器；7—预热盘管；8—活性炭填料柱；9—恒温水浴箱；10—减压阀；11—压力表；12—气象色谱仪；13—溶剂萃取器；14—电磁搅拌器；15—干气表（流量计）

图2 CO2分子与VOCs分子竞争吸附示意图

图3 VOCs在活性炭孔相及体相中的扩散模型

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超临界CO₂法再生油气回收用活性炭机理研究进展

Research progress on the regeneration mechanism of activated carbon for oil vapor recovery under supercritical CO₂

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