复合型抑制剂体系作用下水合物分解特性研究

王宗航; 赵金; 申凯翔; 王英圣; 汪杰

doi:10.12434/j.issn.2097-2547.20240301

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复合型抑制剂体系作用下水合物分解特性研究

- 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
- 低碳化学与化工 2025: 1-8.
- 作者机构：
  
  1. 长江大学机械工程学院，湖北荆州 434023
  2. 中国地质调查局广州海洋地质调查局，广东广州 511458
  3. 天然气水合物勘查开发国家工程研究中心，广东广州 511458
  4. 长江大学石油工程学院，湖北武汉 430074
- 作者简介：
  
  王宗航（2000—），硕士研究生，研究方向为水合物开发理论与技术，E-mail：19966591590@163.com。
  赵金（1988—），博士，副教授，研究方向为水合物开发理论、技术与教学，E-mail：zhaojin@yangtzeu.edu.cn。
- 基金信息：
  
  国家自然科学基金(52204025);广东省海洋经济发展专项资金项目(GDNRC[2022]44)
- DOI：10.12434/j.issn.2097-2547.20240301
  中图分类号： TE832;TE37
- 网络出版日期：2025-02-09，
  
  收稿日期：2024-07-16，
  
  修回日期：2024-08-12，
- 稿件说明：
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王宗航,赵金,申凯翔等.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,

WANG Zonghang,ZHAO Jin,SHEN Kaixiang,et al.Study on decomposition characteristics of hydrate under composite inhibitor systems[J].Low-carbon Chemistry and Chemical Engineering,
王宗航,赵金,申凯翔等.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, DOI：10.12434/j.issn.2097-2547.20240301.

WANG Zonghang,ZHAO Jin,SHEN Kaixiang,et al.Study on decomposition characteristics of hydrate under composite inhibitor systems[J].Low-carbon Chemistry and Chemical Engineering, DOI：10.12434/j.issn.2097-2547.20240301.

摘要

针对天然气水合物（简称“水合物”）堵塞油气管道后如何快速疏通，以及疏通过程水合物的分解问题，利用可视化水合物生成、分解与抑制评价实验装置，通过控制抑制剂浓度，研究了乙二醇（MEG）、聚乙烯吡咯烷酮（PVP）、氯化钠（NaCl）和抗冻蛋白（AFPs）等抑制剂及其复合体系（乙二醇、乙二醇+ PVP、乙二醇+ PVP + AFPs、乙二醇+ PVP + NaCl）作用下水合物分解特性，以及抑制剂间的协同作用。实验过程中，通过网格划分法量化水合物分解过程中的变化。结果表明，在促进水合物分解过程中，抑制剂浓度与促进分解效果间并非总呈正相关，乙二醇+ PVP体系的促进分解效果随PVP浓度增加先上升后下降，乙二醇+ PVP + NaCl体系的促进分解效果随NaCl浓度变化存在峰值。相比乙二醇体系，乙二醇+ PVP体系中PVP的存在降低了釜内压力变化速率，抑制了水合物分解。而在乙二醇+ PVP体系中加入NaCl（乙二醇+ PVP + NaCl体系），则可以有效提高釜内压力变化速率，促进水合物分解。当注入100 mL标记为20.0%乙二醇+ 0.5%PVP + 10.0%NaCl的溶液（配比约为20 mL乙醇、80 mL纯水、0.5 g PVP和10.0 g NaCl），300 min内能够完全分解由100 mL纯水生成的水合物，抑制剂协同作用明显。本研究所用复合型抑制剂可为解决水合物堵塞管道问题以及水合物开发提供参考。

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 increase and then decrease with rising PVP concentrations. In the MEG + PVP + NaCl system

the decomposition-promoting effect show a peak with varying NaCl concentrations. Compared with the MEG system

the presence of PVP in the MEG + PVP system reduce 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 increase the pressure change rate in the reactor

promoting hydrate decomposition. When 100 mL of a 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) was injected

the hydrate formed from 100 mL of pure water could be completely decomposed within 300 minutes

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压力变化速率

Keywords

hydratecomposite inhibitordecompositionsynergypressure change rate

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