System temperature properties in the process of the cyclopentane-methane binary hydrates formation

doi:10.16085/j.issn.1000-6613.2016.05.022

Chemical Industry and Engineering Progree ›› 2016, Vol. 35 ›› Issue (05): 1418-1427.DOI: 10.16085/j.issn.1000-6613.2016.05.022

• Energy processes and technology • Previous Articles Next Articles

System temperature properties in the process of the cyclopentane-methane binary hydrates formation

HU?Yafei^1,2, CAI?Jing¹, LI?Xiaosen¹

1. Guangdong Key Laboratory of New and Renewable Energy Resenrch and Development, Key Laboratory of Gas Hydrate, CAS, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2015-09-28 Revised:2015-11-02 Online:2016-05-05 Published:2016-05-05

环戊烷-甲烷水合物生成过程的温度特性

胡亚飞^1,2, 蔡晶¹, 李小森¹

1. 中国科学院广州能源研究所, 中国科学院天然气水合物重点实验室, 广东省新能源和可再生能源研究开发与应用重点实验室, 广东广州 510640;
2. 中国科学院大学, 北京 100049

通讯作者: 李小森,博士,研究员,博士生导师,主要从事天然气水合物方面的研究。E-mail lixs@ms.giec.ac.cn。
作者简介:胡亚飞(1989-),男,硕士研究生。
基金资助:
国家杰出青年科学基金(51225603)、国家自然科学基金(51376184)、中石油-中科院高端战略联盟计划(2015A-4813-2)及中海油研究总院委托项目(CRI2015RCPS0053OCN)。

Abstract

Abstract: In this paper, the changes of the system temperatures and heat loss were investigated during the formation of cyclopentane-methane binary hydrates. The system temperature measurements were carried out under the conditions of initial temperatures of 4℃, 8℃, and12℃, pressures of 2MPa, 4MPa, 6MPa, 8MPa and 10MPa, and different gas injection modes (single, continuous and intermittent). The maximum temperature (T_max) and the maximum temperature increase (ΔT_max) in the system were compared. The experimental results illustrate that the pressures and gas injection modes have significant influence on T_max while the initial temperatures, pressures and gas injection modes all significantly effect ΔT_max. Thus, the conditions of lower initial temperature, higher pressure and injecting intermittently help to increase ΔT_max. Under the condition of 4℃ and 10MPa, intermittent injection with the interval time of 30minute, the maximum value of ΔT_max is 16.5℃. In addition, the heat analysis results indicate that the main heat loss is from the inner reactor to the outside cold environment. Therefore, improving the insulation properties of insulating layer is helpful to enhance the heating efficiency in the process of the cyclopentane-methane binary hydrates formation.

Key words: hydrate, methane, cyclopentane, formation heat, maximum temperature increase degree

摘要： 研究了环戊烷-甲烷水合物生成过程中的温度变化,分析了体系的热量损失。在不同初始温度(4℃、8℃和12℃)、压力(2MPa、4MPa、6MPa、8MPa和10MPa)和进气方式(一次性进气、连续进气和间歇进气)的条件下,测定了釜内温度,对比了以上各因素对釜内最高温度(T_max)与釜内最大温升(ΔT_max)的影响。实验表明,T_max主要受压力和进气方式影响,初始温度对其影响不明显;ΔT_max受初始温度、压力和进气方式影响显著。在间歇进气方式下,初始温度越低、压力越高,ΔT_max越大。其中,在初始温度为4℃、压力为10MPa、进气时间间隔为30min的间歇进气方式下,ΔT_max可达16.5℃。此外,由热量分析发现,体系的主要热量损耗表现为体系向环境中的散热。因此,提高保温层的绝热性能,有利于提高水合物生成热的热量有效利用率。

关键词: 水合物, 甲烷, 环戊烷, 生成热, 最大温升

CLC Number:

TQ026

HU?Yafei, CAI?Jing, LI?Xiaosen. System temperature properties in the process of the cyclopentane-methane binary hydrates formation[J]. Chemical Industry and Engineering Progree, 2016, 35(05): 1418-1427.

胡亚飞, 蔡晶, 李小森. 环戊烷-甲烷水合物生成过程的温度特性[J]. 化工进展, 2016, 35(05): 1418-1427.

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System temperature properties in the process of the cyclopentane-methane binary hydrates formation

环戊烷-甲烷水合物生成过程的温度特性

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