Kinetics studies of IGCC syngas hydrate formation in the presence of corn cobs and tetrahydrofuran

doi:10.16085/j.issn.1000-6613.2021-0325

Chemical Industry and Engineering Progress ›› 2022, Vol. 41 ›› Issue (1): 174-181.DOI: 10.16085/j.issn.1000-6613.2021-0325

• Energy processes and technology • Previous Articles Next Articles

Kinetics studies of IGCC syngas hydrate formation in the presence of corn cobs and tetrahydrofuran

ZHANG Qingzong¹^,²^,³^,⁴^,⁵(), LYU Qiunan²^,³^,⁴^,⁵, LI Xiaosen²^,³^,⁴^,⁵, YU Yisong²^,³^,⁴^,⁵(), ZHOU Shidong¹()

^1.Jiangsu Key Laboratory of Oil-Gas Storage and Transportation Technology, School of Petroleum Engineering, Changzhou University, Changzhou 213016, Jiangsu, China
^2.Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
^3.Key Laboratory of Gas Hydrate, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
^4.Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, Guangdong, China
^5.Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China

Received:2021-02-10 Revised:2021-06-05 Online:2022-01-24 Published:2022-01-05
Contact: YU Yisong,ZHOU Shidong

玉米棒+四氢呋喃对IGCC合成气水合物生成动力学的影响

张青宗¹^,²^,³^,⁴^,⁵(), 吕秋楠²^,³^,⁴^,⁵, 李小森²^,³^,⁴^,⁵, 余益松²^,³^,⁴^,⁵(), 周诗岽¹()

^1.常州大学石油工程学院油气储运技术省重点实验室，江苏常州 213016
^2.中国科学院广州能源研究所，广东广州 510640
^3.中国科学院天然气水合物重点实验室，广东广州 510640
^4.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
^5.中国科学院广州天然气水合物研究中心，广东广州 510640

通讯作者: 余益松,周诗岽
作者简介:张青宗（1994—），男，硕士研究生，研究方向为气体水合物利用技术。E-mail: zhangqz@ms.giec.ac.cn。
基金资助:
国家自然科学基金(22008237);中国科学院前沿科学“从0到1”原始创新项目(ZDBS-LY-SLH041);广东省自然科学基金(2019A1515012086);广州市基础与应用基础研究项目(202102020720)

Abstract

Abstract:

A series of experiments was conducted at 276.15K and 6.0MPa to evaluate the kinetics of IGCC synthesis gas hydrate formation in the system containing corn cobs and tetrahydrofuran (THF) by measuring induction time, gas consumption, CO₂ recovery and hydrate structure. The results showed that for all experiment cases with or without corn cobs, the induction time was within 180s. Besides, the induction time of the system containing corn cobs was slightly longer than that without corn cobs and this difference almost disappears as the THF concentration increases to mole fraction 4.0% and 5.6%. Further, relative to the system without corn cobs, the time required to complete hydrate formation was longer in the presence of corn cobs. As the THF concentration increases, less time was required for achieving 90% of final gas consumption in the presence of corn cobs. In addition, at a certain THF concentration, the gas consumptions in the presence of corn cobs were larger than that in the system without corn cobs. These indicate that the addition of corn cobs had a positive effect on the kinetics of IGCC syngas hydrates formation and the CO₂ recovery. Interestingly, structure analysis proves that only s?Ⅱ hydrates were observed in the presence of THF with or without corn cobs, while both s??Ⅰ and s?Ⅱ hydrates were found in pure water.

Key words: hydrate, tetrahydrofuran, IGCC syngas, kinetics, CO₂ separation, hydrate structure

摘要：

为了明确玉米棒颗粒与四氢呋喃（THF）对整体煤气化联合循环（IGCC）合成气气体水合物生成的协同作用，在温度276.15K、初始压力为6.0MPa的静态反应条件下，通过实验研究了玉米棒颗粒+THF溶液体系中气体水合物的生成动力学过程，并确定了不同THF浓度溶液条件下水合物的生成诱导时间、气体消耗量、CO₂分离效率及水合物的晶体结构。实验结果表明：玉米棒的存在会延长实验的稳定时间，且其压降幅度相较于不含玉米棒颗粒的体系更高；无论是否含玉米棒颗粒，诱导时间均在180s以内，且随着THF浓度上升到摩尔分数4.0%和5.6%，二者的诱导时间变得非常接近；玉米棒颗粒存在时，THF溶液的浓度越大，气体消耗量达到最终气体消耗量90%的时间则越短，且在相同THF浓度下，其所获得的气体消耗量和CO₂分离效率普遍比纯THF溶液体系高，这意味着玉米棒颗粒的存在提高了THF溶液对CO₂的分离效果。同时，微观结构分析表明无论是否含有玉米棒颗粒，THF溶液体系中所生成的IGCC合成气气体水合物的结构均为sⅡ型，纯水体系中生成的IGCC合成气气体水合物结构均为sⅠ型和sⅡ型的混合结构。

关键词: 水合物, 四氢呋喃, IGCC合成气, 动力学, 二氧化碳分离, 水合物结构

CLC Number:

TQ028

ZHANG Qingzong, LYU Qiunan, LI Xiaosen, YU Yisong, ZHOU Shidong. Kinetics studies of IGCC syngas hydrate formation in the presence of corn cobs and tetrahydrofuran[J]. Chemical Industry and Engineering Progress, 2022, 41(1): 174-181.

张青宗, 吕秋楠, 李小森, 余益松, 周诗岽. 玉米棒+四氢呋喃对IGCC合成气水合物生成动力学的影响[J]. 化工进展, 2022, 41(1): 174-181.

Figures/Tables 9

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实验条件	实验体系	THF摩尔分数/%	诱导时间/s
温度276.15K，压力6.00MPa	玉米棒颗粒+THF溶液+IGCC	2.0	78±29
		3.0	149±28
		4.0	18±2
		5.6	13±4
	THF溶液+IGCC	2.0	62±2
		3.0	49±1
		4.0	12±4
		5.6	11±3

实验条件	实验体系	THF摩尔分数/%	诱导时间/s
温度276.15K，压力6.00MPa	玉米棒颗粒+THF溶液+IGCC	2.0	78±29
		3.0	149±28
		4.0	18±2
		5.6	13±4
	THF溶液+IGCC	2.0	62±2
		3.0	49±1
		4.0	12±4
		5.6	11±3

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Kinetics studies of IGCC syngas hydrate formation in the presence of corn cobs and tetrahydrofuran

玉米棒+四氢呋喃对IGCC合成气水合物生成动力学的影响

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