Decomposition Kinetics for Formation of CO2 Hydrates in Natural Silica Sands

CIESC Journal ›› 2010, Vol. 18 ›› Issue (1): 61-65.

Decomposition Kinetics for Formation of CO₂ Hydrates in Natural Silica Sands

彭效明, 胡玉峰, 杨兰英, 金传伟

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

收稿日期:2009-02-27 修回日期:2009-12-16 出版日期:2010-02-28 发布日期:2010-12-30
通讯作者: HU Yufeng, E-mail: huyf3581@sina.com
作者简介:
基金资助:
Supported by the National Natural Science Foundation of China(40673043,20576073);the Program for New Century Excellent Talents in University from Ministry of Education of China(NCET-06-0088)

Decomposition Kinetics for Formation of CO₂ Hydrates in Natural Silica Sands

PENG Xiaoming, HU Yufeng, YANG Lanying, JIN Chuanwei

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

Received:2009-02-27 Revised:2009-12-16 Online:2010-02-28 Published:2010-12-30
Supported by:
Supported by the National Natural Science Foundation of China(40673043,20576073);the Program for New Century Excellent Talents in University from Ministry of Education of China(NCET-06-0088)

摘要/Abstract

摘要： The decomposition kinetics for formation of CO₂ hydrates in 90 cm³ wet natural silica sands were studied systematically using the depressurization method at the temperatures ranging from 273.2 to 277.2 K and the pressures from 0.5 to 1.0 MPa.The effects of temperature,pressure,particle diameter,porosity,and salinity of formation water on the decomposition kinetics were investigated.The results show that the dissociation percentage increases as temperature increases or as the initial decomposition pressure decreases.An increase in porosity or a decrease in particle diameter of silica sands accelerates the decomposition.Increasing the salinity of the formation water gives rise to a faster decomposition.However,a combination of the present results with the observations in literature reveals that the effect of the coexisting ionic solute depends on its chemical structure.

关键词: CO₂ hydrates, decomposition kinetics, temperature, pressure, particle diameter, porosity, salinity

Abstract: The decomposition kinetics for formation of CO₂ hydrates in 90 cm³ wet natural silica sands were studied systematically using the depressurization method at the temperatures ranging from 273.2 to 277.2 K and the pressures from 0.5 to 1.0 MPa.The effects of temperature,pressure,particle diameter,porosity,and salinity of formation water on the decomposition kinetics were investigated.The results show that the dissociation percentage increases as temperature increases or as the initial decomposition pressure decreases.An increase in porosity or a decrease in particle diameter of silica sands accelerates the decomposition.Increasing the salinity of the formation water gives rise to a faster decomposition.However,a combination of the present results with the observations in literature reveals that the effect of the coexisting ionic solute depends on its chemical structure.

Key words: CO₂ hydrates, decomposition kinetics, temperature, pressure, particle diameter, porosity, salinity

彭效明, 胡玉峰, 杨兰英, 金传伟. Decomposition Kinetics for Formation of CO₂ Hydrates in Natural Silica Sands[J]. CIESC Journal, 2010, 18(1): 61-65.

PENG Xiaoming, HU Yufeng, YANG Lanying, JIN Chuanwei. Decomposition Kinetics for Formation of CO₂ Hydrates in Natural Silica Sands[J]. , 2010, 18(1): 61-65.

参考文献

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Decomposition Kinetics for Formation of CO₂ Hydrates in Natural Silica Sands

Decomposition Kinetics for Formation of CO₂ Hydrates in Natural Silica Sands

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