Influence of carboxymethyl cellulose sodium on the formation kinetics of CO2 hydrate

被引：0

作者：

Shen X. ^{[1
,2
]}

Shao Z. ^{[1
]}

Tang Y. ^{[1
]}

Zhong Y. ^{[1
]}

Liu H. ^{[1
]}

Zhang Y. ^{[1
]}

Wang X. ^{[2
]}

机构：

[1] College of Energy Resources, Chengdu University of Technology, Chengdu

[2] State Key laboratory of Oil & Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu

来源：

Natural Gas Industry | 2021年 / 41卷 / 10期

关键词：

CMC-Na; CO[!sub]2[!/sub] hydrate; Growth rate; Kinetics; Mass transfer control; Modified cellulose; Natural gas hydrate inhibitor; PVP;

D O I：

10.3787/j.issn.1000-0976.2021.10.017

中图分类号：

学科分类号：

摘要：

The formation of natural gas hydrate is one of the key factors influencing the safety of deepsea oil and gas drilling and transportation. In order to inhibit the formation of natural gas hydrate in the process of deepsea oil and gas well drilling and transportation, the influence of carboxymethyl cellulose sodium (CMC-Na) on the formation kinetics of CO2 hydrate at different concentrations, stirring states and polyvinylpyrrolidone (PVP) proportions was studied using the constant temperature and constant volume method under the temperature of 273.25 K and the initial pressure of 3.5 MPa. Both PVP and CMC-Na inhibited the growth rate of CO2 hydrate, but at the same concentration, the inhibition effect of CMC-Na to CO2 hydrate was much stronger than PVP. The inhibition effect could be promoted by increasing the concentration. The inhibition effect of PVP to CO2 hydrate increased with the increase of its molecular weight. The growth rate of CO2 hydrate at stirring state was much higher than that at stationary state. Magnetic stirring increased the growth rate effectively. The combination of CMC-Na and PVP had no synergic inhibition to CO2 hydrate and even deteriorated the inhibition performance.

引用

页码：154 / 160

页数：6

共 24 条

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