Effects of glycine and its composite inhibitor with PVP K90 on formation of carbon dioxide hydrate

YANG Fan; ZHOU Shidong; XIAO Yanyun; WU Zhilei; XU Yixuan; ZHAO Yuer

doi:10.12434/j.issn.2097-2547.20230423

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Effects of glycine and its composite inhibitor with PVP K90 on formation of carbon dioxide hydrate

- Effects of glycine and its composite inhibitor with PVP K90 on formation of carbon dioxide hydrate
- Vol. 49, Issue 10, Pages: 129-135(2024)
- 作者机构：
  
  常州大学石油工程学院江苏省油气储运技术省重点实验室，江苏常州 213164
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20230423
  CLC： TE832
- Published：25 October 2024，
  
  Received：25 December 2023，
  
  Revised：04 February 2024，
- 稿件说明：
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杨帆,周诗岽,肖雁云等.甘氨酸及其与PVP K90复合抑制剂对二氧化碳水合物生成的影响[J].低碳化学与化工,2024,49(10):129-135.

YANG Fan,ZHOU Shidong,XIAO Yanyun,et al.Effects of glycine and its composite inhibitor with PVP K90 on formation of carbon dioxide hydrate[J].Low-carbon Chemistry and Chemical Engineering,2024,49(10):129-135.
杨帆,周诗岽,肖雁云等.甘氨酸及其与PVP K90复合抑制剂对二氧化碳水合物生成的影响[J].低碳化学与化工,2024,49(10):129-135. DOI： 10.12434/j.issn.2097-2547.20230423.

YANG Fan,ZHOU Shidong,XIAO Yanyun,et al.Effects of glycine and its composite inhibitor with PVP K90 on formation of carbon dioxide hydrate[J].Low-carbon Chemistry and Chemical Engineering,2024,49(10):129-135. DOI： 10.12434/j.issn.2097-2547.20230423.

摘要

大规模碳捕集需要通过管道输送二氧化碳（CO

），CO

水合物的生成会影响管道输送安全。甘氨酸对水分子具有较强的扰动作用，可以抑制CO

水合物的生成。以高压可视化反应釜为实验平台，在温度为275.15 K、压力为3.5 MPa和搅拌速率为700 r/min的条件下，开展了甘氨酸单一体系及其与聚乙烯吡咯烷酮（PVP K90）复配体系中的CO

水合物生成实验。结果表明，单一体系中甘氨酸浓度（质量分数）为4.0%时抑制效果最佳，诱导时间比为纯水体系增加了439.02%。水合物生成的温度骤升最高点随着甘氨酸浓度的增加呈现先降后升的趋势。甘氨酸与PVP K90复配能显著延长水合物诱导时间，降低温度骤升最高点。其中，4.0%甘氨酸+ 0.7% PVP K90复配抑制效果最佳，相较于4.0%甘氨酸单一体系，诱导时间延长了105.43%，温度骤升最高点下降了0.15%。本研究可为水合物抑制剂的研发提供参考。

Abstract

Large-scale carbon capture requires the transportation of carbon dioxide (CO

) through pipelines. The formation o

f CO

hydrate can affect the safety of pipeline transportation. Glycine has a strong disturbing effect on water molecules and can inhibit the formation of CO

hydrate. Using a high-pressure visual reaction kettle as the experimental platform

the formation of CO

hydrate was studied in single glycine systems and their composite systems with polyvinylpyrrolidone (PVP K90) under the conditions of temperature 275.15 K

pressure 3.5 MPa and stirring speed 700 r/min. The results show that the inhibition effect is best in the single system when the glycine concentration (mass fraction) is 4.0%

and the induction time is 439.02% of that of the pure water system. The highest point of the temperature rise during hydrate formation shows a trend of first decreasing and then increasing with the increase of glycine concentration. The compounding of glycine and PVP K90 can significantly prolong the induction time of hydrate formation and lower the highest point of temperature rise. Among them

the inhibition effect of the compounding 4.0% glycine and 0.7% PVP K90 is the best. Compared with the single system of 4.0% glycine

the induction time is extended by 105.43% and the highest point of temperature rise is lowered by 0.15%. This study can provide a reference for the development of hydrate inhibitors.

关键词

动力学抑制剂聚乙烯吡咯烷酮甘氨酸二氧化碳水合物

Keywords

kinetic inhibitorpolyvinylpyrrolidoneglycinecarbon dioxidehydrate

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