Experimental study on formation promotion and stabilization mechanisms of CO<sub>2</sub> hydrate in nano-SiO<sub>2</sub> dispersion

FANG Jiajun; LI Dan; YAO Hao; QIN Rui; PANG Weixin; LI Airong

doi:10.12434/j.issn.2097-2547.20250354

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Experimental study on formation promotion and stabilization mechanisms of CO₂ hydrate in nano-SiO₂ dispersion

更新时间：2026-06-25

- Experimental study on formation promotion and stabilization mechanisms of CO₂ hydrate in nano-SiO₂ dispersion
- Vol. 51, Issue 6, Pages: 124-136(2026)
- 作者机构：
  
  1.海洋天然气水合物全国重点实验室，北京 100028
  2.西南石油大学化学化工学院，四川成都 610500
  3.中海油研究总院有限责任公司，北京 100028
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20250354
  CLC： TE06
- Received：12 August 2025，
  
  Revised：2025-10-01，
  
  Published：25 June 2026
- 稿件说明：
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方嘉俊,李丹,姚豪等.纳米SiO₂分散液中CO₂水合物生成促进与稳定机制实验研究[J].低碳化学与化工,2026,51(6):124-136. DOI: 10.12434/j.issn.2097-2547.20250354.

FANG Jiajun,LI Dan,YAO Hao,et al.Experimental study on formation promotion and stabilization mechanisms of CO₂ hydrate in nano-SiO₂ dispersion[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(6):124-136. DOI: 10.12434/j.issn.2097-2547.20250354.
方嘉俊,李丹,姚豪等.纳米SiO₂分散液中CO₂水合物生成促进与稳定机制实验研究[J].低碳化学与化工,2026,51(6):124-136. DOI: 10.12434/j.issn.2097-2547.20250354. DOI：

FANG Jiajun,LI Dan,YAO Hao,et al.Experimental study on formation promotion and stabilization mechanisms of CO₂ hydrate in nano-SiO₂ dispersion[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(6):124-136. DOI: 10.12434/j.issn.2097-2547.20250354. DOI：

摘要

水合物技术在碳捕集与封存（CCS）领域具有广阔的应用前景。然而，在工业应用中该技术仍存在水合物成核与生长过程缓慢、稳定性差、易受环境温压波动影响而分解等问题。为探究纳米SiO

对CO

水合物生成的促进作用及其稳定性的影响机制，通过实验对纳米SiO

分散液和纯水体系中CO

水合物的成核诱导时间、生成速率以及分解行为等进行了研究。结果表明，加入粒径为60 nm、质量分数为0.5%的SiO

后，CO

水合物的成核诱导时间从纯水体系中的36 min显著缩短至24 min，平均生成速率则由0.198 mmol/min提高至0.288 mmol/min，增幅达45%。并且在293.15 K和101.325 kPa条件下，水合物的分解时间由39 min延长至90 min，稳定性显著增强。纳米SiO

在一定程度上可以通过其大的比表面积和表面活性降低CO

水合物的成核能垒，促进非均相成核和反应热散逸；同时也可以在CO

水合物表面形成包裹层，减缓环境热传递，进而提高CO

水合物的生成速率与稳定性。本研究可为纳米材料强化水合物技术在CCS领域的应用提供参考。

Abstract

hydrate-based technology exhibits broad application potential for carbon capture and storage (CCS). However

its industrial deployment is still hindered by several key challenges

including sluggish hydrate nucleation and growth kinetics

insufficient stability

and high susceptibility to decomposition under fluctuating ambient temperature and pressure conditions. The promotion effect of nano-SiO

on CO

hydrate formation was investigated

as well as the underlying mechanism governing hydrate stability. Specifically

the nucleation induction time

formation rate and decomposition behavior of CO

hydrate in both nano-SiO

dispersions and pure water were characterized systematically. The results demonstrate that

with the addition of 0.5% (mass fraction) nano-SiO

with particle size of 60 nm

the nucleation induction time of CO

hydrate is significantly reduced from 36 min to 24 min

while the average formation rate increases from 0.198 mmol/

min to 0.288 mmol/min

corresponding to a 45% enhancement. Furthermore

under ambient conditions (293.15 K

101.325 kPa)

the hydrate decomposition time is extended from 39 min to 90 min

confirming a remarkable improvement in hydrate stability. The reason is that nano-SiO

reduces the nucleation energy barrier of CO

hydrate through its high specific surface area and surface activity

which facilitates heterogeneous nucleation and reaction heat dissipation. Meanwhile

it can form a protective encapsulation layer on the hydrate surface to effectively retard heat transfer

thereby enhancing both the formation kinetics and stability of CO

hydrate. The study can provide a valuable reference for the deployment of nanomaterial-enhanced hydrate technology in CCS applications.

关键词

Keywords

references

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Experimental study on formation promotion and stabilization mechanisms of CO2 hydrate in nano-SiO2 dispersion

DOI：10.12434/j.issn.2097-2547.20250354

摘要

Abstract

关键词

Keywords

references

Experimental study on formation promotion and stabilization mechanisms of CO₂ hydrate in nano-SiO₂ dispersion