Open Access

ARTICLE

Microparticle Effect of Carbon Dioxide Hydrate Crystal Nucleus in Reaction Kettle

by Yujie Bai^1,*, Youquan Huang³, Guangsheng Cao¹, Xiaohan Nan¹, Qingchao Cheng¹, Lei Wang², Tong Du⁴

1 MOE Key Laboratory for Enhanced Oil and Gas Recovery, Northeast Petroleum University, Daqing, China
2 Petro China Jidong Oilfield Company, Tangshan, China
3 Oil Production Engineering Research Institute of Daqing Oilfield, Petro China, Daqing, China
4 School of Science, Zhejiang University, Hangzhou, 310000, China

* Corresponding Author: Yujie Bai. Email:

(This article belongs to the Special Issue: New Trends in Sustainable Materials for Energy Conversion, CO₂ Capture and Pollution Control)

Journal of Renewable Materials 2021, 9(4), 651-669. https://doi.org/10.32604/jrm.2021.014479

Received 30 September 2020; Accepted 03 November 2020; Issue published 01 February 2021

Abstract

This study analyzed the partial effect of carbon dioxide hydrate in reaction kettle experiments. The particle and bubble characteristics of the crystal nucleus during carbon dioxide hydrate decomposition were observed under the microscope. The results showed that in the temperature range of 0.5°C–3.5°C, the pressure range of 3 MPa– 5.5 MPa, phase characteristics in the reaction kettle changed in a complex fashion during carbon dioxide hydrate formation. During hydrate decomposition, numerous carbon dioxide bubbles were produced, mainly by precipitation at high temperatures or in the hydrate cage structure. The hydrate crystal nucleus initially exhibited fluidity in the reaction. However, as the reaction progressed, the hydrate crystal nucleus migrated upward under the influence of gravity and carbon dioxide diffused into the aqueous phase. Next, the hydrate was formed and accumulated, finally forming a solid carbon dioxide hydrate layer.

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