降低“固封”对甲烷水合物生成的影响

doi:10.16085/j.issn.1000-6613.2016.05.021

化工进展 ›› 2016, Vol. 35 ›› Issue (05): 1410-1417.DOI: 10.16085/j.issn.1000-6613.2016.05.021

降低“固封”对甲烷水合物生成的影响

刘军¹, 潘振¹, 马贵阳¹, 商丽艳¹, 谭峰兆²

1. 辽宁石油化工大学石油与天然气工程学院, 辽宁抚顺 113001;
2. 华北石油管理局, 河北任丘 062552

收稿日期:2015-09-21 修回日期:2015-10-12 出版日期:2016-05-05 发布日期:2016-05-05
通讯作者: 潘振,博士,教授,硕士生导师。E-mail 2833519@qq.com。
作者简介:刘军(1991-),男,硕士研究生,从事大量生成天然气水合物研究。E-mail 787551902@qq.com。
基金资助:
辽宁省高等学校优秀人才支持计划项目(LJQ2014038)。

Experimental study on decreasing the effect of the solid seal on methane hydrate

LIU Jun¹, PAN Zhen¹, MA Guiyang¹, SHANG Liyan¹, TAN Fengzhao²

1. Petroleum and Natural Gas Engineering, Liaoning Shihua University, Fushun 113001, Liaoning, China;
2. North China Petroleum Administration Bureau, Renqiu 062552, Hebei, China

Received:2015-09-21 Revised:2015-10-12 Online:2016-05-05 Published:2016-05-05

摘要/Abstract

摘要： 随着天然气的大量使用,其储存、运输及调峰越来越重要。天然气水合物在常压状态下具有高储存比,适合应用于天然气的储存、运输及调峰过程中。因此,对天然气水合物的生成研究具有重要意义。本文研究了如何大量生成水合物并保证水合物具有较高储气率的方法。在含聚乙烯吡络烷酮[PVP(K90)]的溶液中,改变PVP(K90)的质量分数、搅拌器的转速与搅拌器的类型,研究甲烷水合物生成量与水合物储气率的变化。结果表明,添加一定低质量分数的PVP(K90)和增加搅拌速度,均可以延迟水合物层的"固封"作用,增加水合物的生成量。在PVP(K90)质量分数高于2%时,生成水合物的密封性降低,水合物"固封"作用被破坏,但是水合物储气率较低。采用不同形式的搅拌杆,在旋转过程中形成空心圆柱,破坏水合物层的"固封"作用,搅拌杆附近的甲烷与水合物晶核被输送到溶液底部,增加了水合物的生成量,而且水合物的储气率较高。在水合物生成过程中,存在水合物微粒多次聚结的现象,使甲烷的消耗量迅速增加。

关键词: 甲烷水合物, 聚乙烯吡络烷酮, 储气率, 搅拌, 固封

Abstract: Natural gas hydrate is expected to play an important role in the storage, transportation and peak shaving of natural gas in the future. Rapid while in large amount formation of natural gas hydrate is the key of natural gas hydrate application technology. Therefore, there will be of vital significance to study the natural gas hydrate formation process. The method of how to generate a large number of hydrate, while ensuring adequate storage of natural gas was explored in this paper. In the polyethylene pyrrolidone ([PVP (K90)] solution, the concentration of PVP(K90), stirring speed and stirring type were changed to study the number of hydrate changed and gas storage rate of methane hydrate. The results showed that, when the concentration of PVP(K90) and the stirring speed were increased, the solid seal of hydrate layer was held back and the yield of hydrate increased. The tightness of the hydrate was decreased and the solid seal effect of hydrate was destroyed overwhelmingly with the condition of high shear stress and PVP(K90) concentration over 2%. But the gas storage of hydrate also decreased. Different type of stirrer rods, were used to destroy the solid seal effect of hydrate. When the methane and hydrate nucleation was transferred to the bottom of the solution and near the stirring rod, the number of hydrate increased and the gas storage of hydrate became higher. Hydrate particle showed coalescence several times, which will increased the methane consumption during the formation of hydrate.

Key words: methane hydrate, polyethylene pyrrolidone, gas storage rate, stirring, solid seal

中图分类号:

TE89

刘军, 潘振, 马贵阳, 商丽艳, 谭峰兆. 降低“固封”对甲烷水合物生成的影响[J]. 化工进展, 2016, 35(05): 1410-1417.

LIU Jun, PAN Zhen, MA Guiyang, SHANG Liyan, TAN Fengzhao. Experimental study on decreasing the effect of the solid seal on methane hydrate[J]. Chemical Industry and Engineering Progree, 2016, 35(05): 1410-1417.

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降低“固封”对甲烷水合物生成的影响

Experimental study on decreasing the effect of the solid seal on methane hydrate

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