气候变化领域集成服务门户(CCPortal): Methane generation from low-maturity coals and shale source rocks at low temperatures (80-120 degrees C) over 14-38 months

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DOI	10.1016/j.orggeochem.2021.104224
	Methane generation from low-maturity coals and shale source rocks at low temperatures (80-120 degrees C) over 14-38 months
	Ma, Xiangxian; Liu, Bei; Brazell, Corey; Mastalerz, Maria; Drobniak, Agnieszka; Schimmelmann, Arndt
通讯作者	Liu, B (通讯作者)，Indiana Univ, Dept Earth & Atmospher Sci, Bloomington, IN 47405 USA.
发表日期	2021
ISSN	0146-6380
EISSN	1873-5290
卷号	155
英文摘要	This study contributes long-term (14 to 38 months) experimental evidence for geocatalytically mediated methanogenesis in immature to early mature shale and coal source rocks at temperatures from 80 to 120 degrees C. Borosilicate glass tubes with pre-outgassed coal and shale source rock chips and water were sealed under vacuum, sterilized, heated isothermally, and finally opened in connection with a vacuum line where headspace gases methane (CH4) and carbon dioxide (CO2) were collected. The possibility of admitting pre-existing CH4 from closed pores into product gases during heating experiments was evaluated by comparative ball milling of original and heated rock chips, followed by quantitation of released gases with a novel closed-circuit laser-based SARAD RTM2200 gas detector system with sub-mu mol sensitivity. The yields of produced CH4 from individual source rocks were corrected by subtracting the amounts of pre-existing CH4 from formerly closed pores in original source rocks that had leaked during long-term heating. Different shales and coals express contrasting propensities to geocatalytically generate CH4 and CO2, with CH4 yields ranging from 0.1 to 5.5 mu mol g(-1) total organic carbon (TOC). CH4 yields from two petrographically different samples of Springfield Coal with comparable thermal maturity suggest that liptinite expresses a far higher propensity for methanogenesis, but liberates less CH4 than vitrinite. Shale from the Second White Specks Formation generated approximately 10 times more CH4 than New Albany Shale per g of TOC, further suggesting complex controls on CH4 generation during catalytic methanogenesis. Higher temperature can enhance the activities of catalytic methanogenesis. The extrapolation of laboratory-based reaction rates to natural conditions in organic-rich buried sediments suggests that geocatalytic methanogenesis can be fast enough in some source rocks to generate economically sizeable gas plays from immature to early mature source rocks over geologic time. (C) 2021 Elsevier Ltd. All rights reserved.
关键词	TRANSITION-METAL CATALYSIS ORGANIC-MATTER HYDROUS-PYROLYSIS WOODFORD SHALE IMMATURE OILS GAS PETROLEUM HYDROCARBON KEROGEN MINERALS
英文关键词	Methane; Natural gas; Carbon dioxide; Catalysis; Heating experiments; Coal; Shale
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000647678500003
来源期刊	ORGANIC GEOCHEMISTRY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254436
作者单位	[Ma, Xiangxian; Liu, Bei; Brazell, Corey; Schimmelmann, Arndt] Indiana Univ, Dept Earth & Atmospher Sci, Bloomington, IN 47405 USA; [Ma, Xiangxian] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China; [Mastalerz, Maria; Drobniak, Agnieszka] Indiana Univ, Indiana Geol & Water Survey, Bloomington, IN 47405 USA
推荐引用方式 GB/T 7714	Ma, Xiangxian,Liu, Bei,Brazell, Corey,et al. Methane generation from low-maturity coals and shale source rocks at low temperatures (80-120 degrees C) over 14-38 months[J]. 中国科学院西北生态环境资源研究院,2021,155.
APA	Ma, Xiangxian,Liu, Bei,Brazell, Corey,Mastalerz, Maria,Drobniak, Agnieszka,&Schimmelmann, Arndt.(2021).Methane generation from low-maturity coals and shale source rocks at low temperatures (80-120 degrees C) over 14-38 months.ORGANIC GEOCHEMISTRY,155.
MLA	Ma, Xiangxian,et al."Methane generation from low-maturity coals and shale source rocks at low temperatures (80-120 degrees C) over 14-38 months".ORGANIC GEOCHEMISTRY 155(2021).