Kinetic hydrate inhibitor performance of new copolymer poly(N-vinyl-2-pyrrolidone-co-2-vinyl pyridine)s with TBAB  

作　　者：Jun Hu Sijia Li Yanhong Wang Xuemei Lang Qingping Li Shuanshi Fan 

机构地区：[1]Key Laboratory of Enhanced Heat Transfer and Energy Conversation,Ministry of Education,School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510641,Guangdong,China [2]State Key Laboratory of Of fshore Oil Exploitation,Beijing 100027,China

出　　处：《Journal of Natural Gas Chemistry》2012年第2期126-131,共6页天然气化学杂志（英文版）

基　　金：supported by the National Basic Research Program of China ("973" Program) (Grant No. 2009CB219504-03);the National Natural Science Foundation of China (Grant No 51106054);the Colleges and Universities High-level Talents Program of Guangdong

摘　　要：In oil and gas field, the application of kinetic hydrate inhibitors （KHIs） independently has remained problematic in high subcooling and high water-cut situation. One feasible method to resolve this problem is the combined use of KHIs and some synergists, which would enhance KHIs’ inhibitory effect on both hydrate nucleation and hydrate crystal growth. In this study, a novel kind of KHI copolymer poly（N-vinyl-2-pyrrolidone-co-2-vinyl pyridine）s （HGs） is used in conjunction with TBAB to show its high performance on hydrate inhibition. The performance of HGs with different monomer ratios in structure II tetrahydrofuran （THF） hydrate is investigated using kinetic hydrate inhibitor evaluation apparatus by step-cooling method and isothermal cooling method. With the combined gas hydrate inhibitor at the concentration of 1.0 wt%, the induction time of 19 wt% THF solution could be prolonged to 8.5 h at a high subcooling of 6℃. Finally, the mechanism of HGs inhibiting the formation of gas hydrate is proposed.In oil and gas field, the application of kinetic hydrate inhibitors （KHIs） independently has remained problematic in high subcooling and high water-cut situation. One feasible method to resolve this problem is the combined use of KHIs and some synergists, which would enhance KHIs’ inhibitory effect on both hydrate nucleation and hydrate crystal growth. In this study, a novel kind of KHI copolymer poly（N-vinyl-2-pyrrolidone-co-2-vinyl pyridine）s （HGs） is used in conjunction with TBAB to show its high performance on hydrate inhibition. The performance of HGs with different monomer ratios in structure II tetrahydrofuran （THF） hydrate is investigated using kinetic hydrate inhibitor evaluation apparatus by step-cooling method and isothermal cooling method. With the combined gas hydrate inhibitor at the concentration of 1.0 wt%, the induction time of 19 wt% THF solution could be prolonged to 8.5 h at a high subcooling of 6℃. Finally, the mechanism of HGs inhibiting the formation of gas hydrate is proposed.

关 键 词：clathrate hydrate kinetic hydrate inhibitors combined hydrate inhibitors poly（N-vinyl-2-pyrrolidone-co-2-vinyl pyridine） 

分 类 号：O623.624[理学—有机化学] TQ331.46[理学—化学]