功能化多壁碳纳米管与L-亮氨酸复配体系中甲烷水合物动力学特征

单文昊; 王琳; 吴祥恩; 杨雨奇; 王菊慧子; 蔡玉叶

doi:10.19509/j.cnki.dzkq.tb20230215

功能化多壁碳纳米管与L-亮氨酸复配体系中甲烷水合物动力学特征

doi: 10.19509/j.cnki.dzkq.tb20230215

单文昊^1,,
王琳^{2, 3},
吴祥恩^1, ,,
杨雨奇¹,
王菊慧子¹,
蔡玉叶¹

1.
海南热带海洋学院海洋科学技术学院, 海南三亚 572022
2.
中国石油吐哈油田分公司勘探开发研究院, 新疆哈密 839009
3.
中国地质大学(武汉)构造与油气资源教育部重点实验室, 武汉 430074

基金项目:

海南省科技计划三亚崖州湾科技城联合项目 420LH028

国家自然科学基金项目 42266008

国家自然科学基金项目 41906060

海南省2021年国家级大学生创新创业训练计划项目 202111100022

海南省2022年国家级大学生创新创业训练计划项目 202211100008

海南热带海洋学院校级引进人才科研启动项目 RHDRC202109

构造与油气资源教育部重点实验室开放基金项目 TPR-2021-23

详细信息

作者简介:
单文昊, E-mail: 1774626776@qq.com

通讯作者:
吴祥恩, E-mail: 361724081@qq.com

中图分类号: TE31
计量
- 文章访问数: 179
- PDF下载量: 21
- 被引次数: 0
出版历程
- 收稿日期: 2023-04-20
- 录用日期: 2023-07-13
- 修回日期: 2023-07-06

Kinetic characteristics of methane hydrate in functionalized multi-walled carbon nanotubes and L-leucine compounding system

SHAN Wenhao^1
,,
WANG Lin^{2, 3},
WU Xiang'en^{1
, ,},
YANG Yuqi¹,
WANG Juhuizi¹,
CAI Yuye¹

1.
College of Marine Science and Technology, Hainan Tropical Ocean University, Sanya Hainan 572022, China
2.
Research Institude of Exploration and Development of Tuha Oilfield Company, PetroChina, Hami Xinjiang 839009, China
3.
Key Laboratory of Structure and Petroleum Resources, Ministry of Education, China University of Geosciences(Wuhan), Wuhan 430074, China

More Information

Author Bio:
SHAN Wenhao, E-mail: 1774626776@qq.com

Corresponding author: WU Xiang'en, E-mail: 361724081@qq.com

摘要

摘要:
加快天然气水合物形成, 对基于水合物法的天然气储运、气体分离和二氧化碳捕集技术的推动具有重要意义。采用恒温恒容法研究了w_B=0.05%功能化(羟基化、羧基化和氨基化)多壁碳纳米管和w_B=1.0% L-亮氨酸复配体系中甲烷水合物动力学特征。研究表明, 多壁碳纳米管、羧基化和羟基化多壁碳纳米管与L-亮氨酸的复配, 可使甲烷水合物诱导成核时间大幅缩短至25, 22, 13 min左右, 促进效果与典型促进剂十二烷基硫酸钠相当, 且促进效果优于单一添加剂体系。复配体系甲烷储气质量分数具有良好表现, 可达136~142 mg/g。对甲烷平均吸收速率和瞬时吸收速率的分析表明, 多壁碳纳米管对生长阶段甲烷水合物的生长动力学影响很小。复配体系和L-亮氨酸体系中甲烷水合物的生长具有相似性, 均呈现出甲烷气体吸收速率快速增加到最大值, 然后迅速下降并完成生长的特点。综合分析表明, 多壁碳纳米管和L-亮氨酸的复配对甲烷水合物的成核速率具有协同增强效应, 而生长阶段的进程与速率主要受L-亮氨酸影响。该研究为探索不同类型添加剂在强化甲烷水合物生成动力学上的差异化机理提供了新思路。
- 甲烷水合物 /
- 多壁碳纳米管 /
- L-亮氨酸 /
- 协同促进 /
- 成核 /
- 生长
Abstract: Objective
Accelerated the generation of natural gas hydrate is crucial for advancing hydrate-based technologies such as gas storage, gas separation, and CO₂ capture.
Methods
The kinetic characteristics of methane hydrate generated with the w_B=0.05% functionalized (hydroxylated, carboxylated, and aminated) multi-walled carbon nanotubes(MWCNT) system, and in combination with the w_B=1.0% L-leucine were investigated through constant temperature and constant volume methods.
Results
The combination of multiwalled carbon nanotubes and carboxylated and hydroxylated multiwalled carbon nanotubes with L-leucine, significantly reduced the induction time for natural gas hydrate nucleation to approximately 25, 22, and 13 minutes, respectively. This promotion effect is comparable to that of the typical promoter sodium dodecyl sulfate, and the promotion effect is better than that of a single additive system. The methane storage density of the compounded system reached 136-142 mg/g. Analysis of both the average and instantaneous methane uptake rates indicated that multiwalled carbon nanotubes had minimal impact on the growth kinetics of methane hydrate during the growth phase. The growth of methane hydrate in both the compounded and L-leucine systems were similar, characterized by a rapid increase in uptake rate to a peak value, followed by a rapid decrease and eventual completion of the growth phase.
Conclusion
A comprehensive analysis suggests that the combination of MWCNTs and L-leucine synergistically enhances the nucleation rate of methane hydrate, whereas the process and rate of the growth phase are predominantly influenced by L-leucine. This study presents a new idea for exploring the differentiation mechanism of different types of additives in enhancing the kinetics of methane hydrate generation.
- methane hydrate /
- multi-walled carbon nanotube /
- L-leucine /
- synergistic promotion /
- nucleation /
- growth
注释:

所有作者声明不存在利益冲突。

HTML全文

图 1 甲烷水合物合成装置示意图

Figure 1. Schematic diagram of the hydrate synthesis device

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图 2 甲烷水合物生成机理图

Figure 2. Schematic diagram of methane hydrate formation

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图 3 甲烷气体瞬时吸收速率求解示意图(以0.05%氨基化碳纳米管和1% L-亮氨酸复配体系为例)

Figure 3. Schematic diagram of the gas transient absorption rate solution(0.05% aminated carbon nanotubes and 1% L-leucine compound system were used as an example)

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图 4 不同体系甲烷水合物生成过程随压力(a)和温度(b)变化图

Figure 4. Variations in pressure(a) and temperature(b) during methane hydrate generation under different systems

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图 5 不同体系甲烷气体吸收量的变化

Figure 5. Variation in methane gas absorption for different systems

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图 6 不同体系甲烷水合物诱导时间与甲烷气体平均吸收速率比较图

a.不同溶液体系与纯水体系t₉₀的比值；b.不同体系甲烷气体平均吸收速率

Figure 6. Comparison between the induction time of methane hydrate in different systems and average absorption rate of methane gas

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图 7 不同体系甲烷气体瞬时吸收速率

Figure 7. Instantaneous absorption rates of methane gas for different systems

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