全可视化反应釜内二氧化碳水合物的生成分解特征

doi:10.16085/j.issn.1000-6613.2022-0022

化工进展 ›› 2022, Vol. 41 ›› Issue (10): 5363-5372.DOI: 10.16085/j.issn.1000-6613.2022-0022

全可视化反应釜内二氧化碳水合物的生成分解特征

毛港涛¹^,²(), 李治平², 王凯¹(), 丁垚³

^1.北京石油化工学院，深水油气管线关键技术与装备北京市重点实验室，北京 102617
^2.中国地质大学(北京) 能源学院，北京 100083
^3.中石化石油勘探开发研究院地面工程研究所，北京 102206

收稿日期:2022-01-04 修回日期:2022-01-25 出版日期:2022-10-20 发布日期:2022-10-21
通讯作者: 王凯
作者简介:毛港涛（1997—），男，博士研究生，研究方向为油气田开发工程。E-mail：137971549@qq.com。
基金资助:
北京市自然科学基金面上项目(3222029);中央高校基本科研业务费项目(2-9-2021-070)

Analysis of the characteristics of the formation and dissociation of carbon dioxide hydrate in the fully visualized reactor

MAO Gangtao¹^,²(), LI Zhiping², WANG Kai¹(), DING Yao³

^1.Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deepwater Oil & Gas Development, Beijing Institute of Petrochemical Technology, Beijing 102617, China
^2.School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China
^3.Facility Engineering Department, Petroleum Exploration and Production Research Institute, Sinopec, Beijing 102206, China

Received:2022-01-04 Revised:2022-01-25 Online:2022-10-20 Published:2022-10-21
Contact: WANG Kai

摘要/Abstract

摘要：

二氧化碳水合物封存技术已成为目前碳封存研究的热点。该技术中对于二氧化碳水合物的生成分解特征及其影响因素的研究是当前的重点和难点。本文设计了高压全透明双反应釜实验平台，以高纯度二氧化碳和去离子水作为研究对象，在17℃、7MPa的初始温压条件下，进行了二氧化碳水合物的初次和二次生成分解实验，并设置对照组对搅拌的影响进行了研究，而后与甲烷在相同条件下的实验进行对比。实验结果表明，搅拌会促进二氧化碳水合物的生成，在400r/min的转速条件下，缩短诱导时间可达40%，增大压降速率可达15%，形成更多且更致密厚实的水合物，并延缓了分解；多次生成可以减少水合物的诱导时间，但对于水合物生成的总量几乎没有影响。与甲烷水合物相比，二氧化碳水合物生成的量大且更难以分解，实验结果有利于二氧化碳的海洋水合物封存技术的开发应用。

关键词: 碳封存, 二氧化碳水合物, 全透明双反应釜, 生成分解, 搅拌, 诱导时间

Abstract:

Carbon dioxide hydrate storage has become a research hotspot in the field of carbon sequestration. For this technology, the research on the formation and decomposition characteristics of carbon dioxide hydrate and its influencing factors is the focus and difficulty at present. Therefore, a high-pressure fully transparent double- reactor experimental platform was designed in this paper. Taking high-purity carbon dioxide and deionized water as the research object, the primary and secondary formation/decomposition experiments of carbon dioxide hydrate were carried out under the initial temperature of 17℃and pressure of 7MPa, and the influence of stirring was studied by setting the comparing group. Besides, the experiments were compared with the experiments of methane under the same conditions. The experimental results showed that stirring could promote the formation of carbon dioxide hydrate. At the rotating speed of 400r/min, the induction period could be shortened by 40%, the pressure drop rate could be increased by 15%, more and denser hydrate could be formed, and the decomposition could be delayed. Multiple formation could reduce the induction time of hydrate, but it had little effect on the amount of hydrate. Compared with methane hydrate, the carbon dioxide hydrates were produced in larger quantities and more difficult to decompose. The experimental results were conducive to the marine hydrate storage of carbon dioxide.

Key words: carbon dioxide hydrate, carbon sequestration, fully transparent double reactor, formation and dissociation, stir, induction time

中图分类号:

TE992.1

毛港涛, 李治平, 王凯, 丁垚. 全可视化反应釜内二氧化碳水合物的生成分解特征[J]. 化工进展, 2022, 41(10): 5363-5372.

MAO Gangtao, LI Zhiping, WANG Kai, DING Yao. Analysis of the characteristics of the formation and dissociation of carbon dioxide hydrate in the fully visualized reactor[J]. Chemical Industry and Engineering Progress, 2022, 41(10): 5363-5372.

图/表 13

图1 实验装置示意图

图2 水合物生成过程以及形态对比图

图3 上下釜水合物生成过程温压图

图4 水合物分解过程以及形态对比图

图5 上下釜水合物分解过程温压图

图6 水合物二次生成过程以及形态对比图

图7 上下釜水合物二次生成过程温压图

图8 水合物二次分解过程以及形态对比图

图9 水合物二次分解过程温压对比图

图10 甲烷和二氧化碳水合物生成对比图

图11 甲烷和二氧化碳水合物分解对比图

图12 初次二次生成过程温压对比图

图13 初次二次分解过程温压对比图

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全可视化反应釜内二氧化碳水合物的生成分解特征

Analysis of the characteristics of the formation and dissociation of carbon dioxide hydrate in the fully visualized reactor

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