低碳化学与化工2025，Vol.50Issue(9)：126-133,8.DOI:10.12434/j.issn.2097-2547.20240301
复合型抑制剂体系作用下水合物分解特性研究
Study on decomposition characteristics of hydrate under composite inhibitor systems
摘要
Abstract
To address the issue of quickly unblocking natural gas hydrate(referred to as"hydrates")obstructions in oil and gas pipelines and the decomposition of hydrates during the unblocking process,a visual experimental apparatus for hydrate formation,decomposition and inhibition evaluation was utilized.By controlling the inhibitor concentration,the decomposition characteristics of hydrates under the action of inhibitors were investigated,such as ethylene glycol(MEG),polyvinylpyrrolidone(PVP),sodium chloride(NaCl),antifreeze proteins(AFPs)and their composite systems(MEG,MEG+PVP,MEG+PVP+AFPs,MEG+PVP+NaCl).The synergistic effects among inhibitors were also examined.During the experiments,the grid partitioning method was employed to quantify the changes occurring during hydrate decomposition.The results indicate that the relationship between inhibitor concentration and decomposition promotion is not always positively correlated.For the MEG+PVP system,the decomposition-promoting effect first increases and then decreases with rising PVP concentrations.In the MEG+PVP+NaCl system,the decomposition-promoting effect shows a peak with varying NaCl concentrations.Compared with the MEG system,the presence of PVP in the MEG+PVP system reduces the rate of pressure change in the reactor,thereby inhibiting hydrate decomposition.However,the addition of NaCl to the MEG+PVP system(forming the MEG+PVP+NaCl system)significantly increases the pressure change rate in the reactor,promoting hydrate decomposition.When 100 mL solution labeled as 20.0%MEG+0.5%PVP+10.0%NaCl(approximately 20 mL ethanol,80 mL pure water,0.5 g PVP and 10.0 g NaCl)is injected,the hydrate formed from 100 mL pure water can be completely decomposed within 300 min,demonstrating significant synergistic effects among the inhibitors.The composite inhibitors used in this study can provide a reference for addressing hydrate pipeline blockages and advancing hydrate exploitation.关键词
水合物/复合型抑制剂/分解/协同作用/压力变化速率Key words
hydrate/composite inhibitor/decomposition/synergistic effects/pressure change rate分类
能源科技引用本文复制引用
王宗航,赵金,申凯翔,王英圣,汪杰..复合型抑制剂体系作用下水合物分解特性研究[J].低碳化学与化工,2025,50(9):126-133,8.基金项目
国家自然科学基金(52204025) （52204025）
广东省海洋经济发展专项资金项目(GDNRC[2022]44). （GDNRC[2022]44）
