On-line hydropyrolysis gas chromatography-mass spectrometry (HyPy-GC-MS) for kerogen-bound biomarkers

doi:10.1016/j.orggeochem.2024.104927

	Wang, Fu 1,2,3; Liao, Yuhong1,2,3 ; Hsu, Chang Samuel 4,5,6
	On-line hydropyrolysis gas chromatography-mass spectrometry (HyPy-GC-MS) for kerogen-bound biomarkers
刊名	ORGANIC GEOCHEMISTRY
ISSN号	0146-6380
	2025-02-01
卷号	200 页码:11
DOI	10.1016/j.orggeochem.2024.104927
语种	英语
WOS研究方向	Geochemistry & Geophysics
摘要	Flash pyrolysis gas chromatography-mass spectrometry (Py-GC-MS) is seldom used to release bound biomarkers, because its hydrogen-poor pyrolysis conditions usually result in a low yield of bound biomarkers and high concentrations of olefins. In this study, by using a Py-GC-MS system and immature kerogen/coal samples, we investigated the effects of heating rate (flash versus 30 degrees C/min), carrier/reaction gas (He versus H-2), hydrogen pressure, and catalyst [(NH4)(2)MoO2S2] on the yields and distributions of bound biomarkers. Also, the bound biomarkers obtained by different pyrolysis conditions were compared with those from catalytic offline hydropyrolysis (HyPy) and free biomarkers from extracted organic matter (EOM). We propose a new technology of hydropyrolysis-gas chromatography-mass spectrometry (HyPy-GC-MS) to be used to release bound biomarkers. HyPy-GC-MS using low-pressure H-2 at slow heating rate can increase the yield of bound biomarkers by 3-9 times, minimize the cracking of the hopanes side chain, better preserve the original sterane and terpane distributions, and have characteristics of lower maturity, compared with conventional flash Py-GC-MS without H-2. Additionally, the steroidal and terpenoid yields by HyPy-GC-MS using low-pressure H-2 at slow heating rate from immature kerogens were 3-6 times that by HyPy. Compared with EOM, biomarker maturity parameter derived from HyPy-GC-MS may not fully represent the actual maturity of samples. Higher hydrogen pressure can significantly facilitate the hydrogenation of unsaturated hydrocarbons into saturated hydrocarbons, but it can also decrease the yields of pyrolysates with higher carbon numbers (i.e., >C-25), leading to a change in the biomarker ratios related to carbon numbers (e.g., the proportion of C-27-C-28-C-29 alpha alpha alpha 20R steranes and TT23/H-30 ratio).
关键词	Bound biomarker Kerogen Hydropyrolysis Py-GC-MS Hydrogen Flash pyrolysis
WOS记录号	WOS:001408491100001
收录类别	SCI
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.gig.ac.cn/handle/344008/82607
专题	有机地球化学国家重点实验室
通讯作者	Liao, Yuhong
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.Univ Chinese Acad Sci, Yuquan Rd, Beijing 100049, Peoples R China 4.Petro Bio Oil Consulting, Tallahassee, FL 32312 USA 5.Florida State Univ, Florida A&M Univ, Dept Chem & Biomed Engn, Tallahassee, FL 32310 USA 6.China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
推荐引用方式 GB/T 7714	Wang, Fu,Liao, Yuhong,Hsu, Chang Samuel. On-line hydropyrolysis gas chromatography-mass spectrometry (HyPy-GC-MS) for kerogen-bound biomarkers[J]. ORGANIC GEOCHEMISTRY,2025,200:11.
APA	Wang, Fu,Liao, Yuhong,&Hsu, Chang Samuel.(2025).On-line hydropyrolysis gas chromatography-mass spectrometry (HyPy-GC-MS) for kerogen-bound biomarkers.ORGANIC GEOCHEMISTRY,200,11.
MLA	Wang, Fu,et al."On-line hydropyrolysis gas chromatography-mass spectrometry (HyPy-GC-MS) for kerogen-bound biomarkers".ORGANIC GEOCHEMISTRY 200(2025):11.