氯化钠和酪氨酸增强PVP抑制水合物的性能  

Enhancement of the performance of polyvinylpyrrolidone(PVP) for inhibiting hydrate formation by means of NaCl and L-tyrosine

作　　者：王杰[1] 艾志久[1] 

机构地区：[1]西南石油大学机电工程学院,成都610500

出　　处：《北京化工大学学报（自然科学版）》2017年第3期39-44,共6页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：石油天然气装备教育部重点实验室开放基金(OGE201403-28)

摘　　要：油气输送管道在一定条件下会形成水合物,可能导致灾难性的后果,通过注入动力学抑制剂,可以延迟水合物的形成。在11.7 MPa和293.1 K条件下,向高压反应釜内注入混合气体(甲烷、乙烷和丙烷),实验研究NaCl和酪氨酸(L-tyrosine)对聚乙烯吡咯烷酮(PVP)抑制水合物性能的影响。通过测量水合物的成核温度、诱导时间和耗气量,评判NaCl和L-tyrosine对PVP抑制水合物的效果。实验结果表明:添加1%(质量分数,下同)的PVP后,水合物的成核温度为282.7 K,诱导时间为45 min,耗气量为5.96×10^(-2)mol;然而,添加0.25%NaCl、0.25%L-tyrosine与0.5%PVP组合抑制剂后,水合物的成核温度为281.7 K,诱导时间为65 min,耗气量为5.19×10^(-2)mol,比蒸馏水系统的气体消耗量减少了约27%。因此,NaCl和L-tyrosine能明显提高PVP抑制水合物的效果。Gas hydrates can be formed under certain conditions in oil and gas transmission pipelines, which may have disastrous consequences. Hydrate formation can be delayed by adding kinetic hydrate inhibitors. In a high- pressure reactor with methane, ethane and propane gas mixture under a pressure of 11.7 MPa at 293.1 K, the effect of adding NaCl and L-tyrosine on polyvinylpyrrolidone （PVP） as a kinetic inhibitor of the formation of hydrates has been studied. By measuring the temperature of hydrate nucleation, induction time and gas consumption, the effect of NaCl, L-tyrosine and PVP on the inhibition of hydrate formation were studied. The experimental results show that when adding 1% PVP, the temperature of hydrate nucleation is about 282.7 K, the induction time is 45 minutes and the total consumption of gas mixture is 5.96 ×10^-2mol. However, when adding 0.25% NaC1, 0.25% L-tyrosine and 0.5% PVP, the temperature of hydrate nucleation is about 281.7K, the induction time is 65 minutes and the total consumption of gas mixtureis 5.19 ×10^-2 mol. The gas consumption is reduced by about 27% compared to the pure water system. Therefore, NaCl and L-tyrosine can significantly improve the inhibition performance of PVP.

关 键 词：抑制剂 水合物 诱导时间 耗气量 聚乙烯吡咯烷酮(PVP) 酪氨酸(L-tyrosine) 

分 类 号：TE39[石油与天然气工程—油气田开发工程]