丁二酸二异辛酯磺酸钠对甲烷水合物生长动力学特性的影响

doi:10.16085/j.issn.1000-6613.2019-0885

化工进展 ›› 2020, Vol. 39 ›› Issue (3): 938-946.DOI: 10.16085/j.issn.1000-6613.2019-0885

丁二酸二异辛酯磺酸钠对甲烷水合物生长动力学特性的影响

路大勇¹(),吕晓方¹(),柳扬¹,闫柯乐^2,³,周诗岽¹,左江伟¹,赵会军¹,王树立¹

^1.常州大学油气储运技术省重点实验室，江苏常州 213016
^2.中国石油化工股份有限公司青岛安全工程研究院，山东青岛 266000
^3.化学品安全控制国家重点实验室，山东青岛 266071

收稿日期:2019-05-31 出版日期:2020-03-05 发布日期:2020-04-03
通讯作者: 吕晓方
作者简介:路大勇（1994—），男，硕士研究生，研究方向为甲烷水合物应用技术。E-mail：877618129@qq.com。
基金资助:
国家自然科学基金(51804046);中国石油科技创新基金研究项目(2018D-5007-0602);江苏省高等学校自然科学研究面上项目(18KJB440001)

Effect of docusate sodium on growth kinetics of methane hydrate

Dayong LU¹(),Xiaofang LÜ¹(),Yang LIU¹,Kele YAN^2,³,Shidong ZHOU¹,Jiangwei ZUO¹,Huijun ZHAO¹,Shuli WANG¹

^1.Jiangsu Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University, Changzhou 213016, China
^2.SINOPEC Research Institute of Safety Engineering, Qingdao 266000, China
^3.State Key Laboratory of Safety and Control for Chemicals, Qingdao 266071, China

Received:2019-05-31 Online:2020-03-05 Published:2020-04-03
Contact: Xiaofang Lü

摘要/Abstract

摘要：

通过改变添加量（600mg/L、900mg/L、1200mg/L）、过冷度（3.5℃、5.5℃、7.5℃）以及压力（4.90MPa、6.0MPa、7.31MPa）的方式，考察了在静态体系下绿色促进剂丁二酸二异辛酯磺酸钠（AOT）对甲烷水合物生长动力学特性的影响。实验结果表明，3种浓度下AOT均能够有效缩短诱导时间，并且浓度越大，诱导时间越小（1200mg/L时为0.21h），但储气量随着添加量的增加，先增大后减小，最终确定最佳添加量为900mg/L，水合物储气量为55.76m³/m³；另外，过冷度越大，实验压力越高，水合物成核速度越快，诱导时间越短，耗气速率越高。当过冷度为7.5℃时，诱导时间最小为0.31h，耗气速率最大为0.275mol/h，储气量最大为63.95m³/m³；但压力过大，釜内气液界面会快速生成水合物层，阻碍水合物继续生成，导致水合物储气量减少为46.84m³/m³。所以，在静态体系下，合理选择促进剂的浓度和驱动力的大小，可显著促进水合物生成。

关键词: 甲烷水合物, 静态体系, 恒压, 表面活性剂

Abstract:

In this experiment, the green promotion in the static system was investigated by changing the amount of addition (600mg/L, 900mg/L, 1200mg/L), subcooling (3.5℃, 5.5℃, 7.5℃) and pressure (4.90MPa, 6.0MPa, 7.31MPa). The experimental results show that AOT can effectively shorten the induction time under the three concentrations, and the higher the concentration, the smaller the induction time (0.21h at 1200mg/L), but the gas storage increases first and then decreases with the increase of the added amount. Finally, the optimum addition amount is 900mg/L, and the hydrate storage capacity is 55.76m³/m³. In addition, the higher the degree of subcooling and the higher the experimental pressure, the faster the hydrate nucleation rate, the shorter the induction time, and the higher the gas consumption rate. When the degree of subcooling is 7.5℃, the induction time is 0.31h, the gas consumption rate is 0.275mol/h, and the maximum gas storage is 63.95m³/m³. However, if the pressure is too high, hydrate will rapidly be formed at the gas-liquid interface in the kettle. The layer hinders the hydrates from continuing to form, resulting in a reduction of hydrate storage capacity to 46.84 m³/m³. Therefore, under the static system, reasonable selection of the concentration of the promoter and the driving force can significantly promote the formation of hydrate.

Key words: methane hydrate, static system, constant pressure, surfactants

中图分类号:

TE89

路大勇,吕晓方,柳扬,闫柯乐,周诗岽,左江伟,赵会军,王树立. 丁二酸二异辛酯磺酸钠对甲烷水合物生长动力学特性的影响[J]. 化工进展, 2020, 39(3): 938-946.

Dayong LU,Xiaofang LÜ,Yang LIU,Kele YAN,Shidong ZHOU,Jiangwei ZUO,Huijun ZHAO,Shuli WANG. Effect of docusate sodium on growth kinetics of methane hydrate[J]. Chemical Industry and Engineering Progress, 2020, 39(3): 938-946.

图/表 6

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丁二酸二异辛酯磺酸钠对甲烷水合物生长动力学特性的影响

Effect of docusate sodium on growth kinetics of methane hydrate

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