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  

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

作　　者：杨帆 周诗岽 肖雁云 吴志磊 徐义轩 赵玉儿 YANG Fan;ZHOU Shidong;XIAO Yanyun;WU Zhilei;XU Yixuan;ZHAO Yuer(Jiangsu Key Laboratory of Oil-Gas Storage and Transportation Technology,School of Petroleum Engineering,Changzhou University,Changzhou 213164,Jiangsu,China)

机构地区：[1]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

出　　处：《低碳化学与化工》2024年第10期129-135,共7页Low-Carbon Chemistry and Chemical Engineering

基　　金：国家自然科学基金(51974037)。

摘　　要：大规模碳捕集需要通过管道输送二氧化碳(CO_(2)),CO_(2)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_(2)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_(2)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。Large-scale carbon capture requires the transportation of carbon dioxide(CO_(2))through pipelines.The formation of CO_(2) hydrate can affect the safety of pipeline transportation.Glycine has a strong disturbing effect on water molecules and can inhibit the formation of CO_(2) hydrate.Using a high-pressure visual reaction kettle as the experimental platform,the formation of CO_(2) 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 

分 类 号：TE832[石油与天然气工程—油气储运工程]