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Experimental investigations on the thermochemical oxidation of n-alkane and alcohol compounds by MnO2 and Fe2O3 at temperatures up to 325 degrees C
Wan, Ye1,2,3,4,5; Bourdet, Julien4; Hu, Wenxuan1,2; Kang, Xun6; Heath, Charles4; Qiu, Ye1,2; Gao, Wanlu1,2; Wang, Xiaolin1,2,3
2021-01-05
Source PublicationCHEMICAL GEOLOGY
ISSN0009-2541
Volume559Pages:14
AbstractThermochemical oxidation of organic components (TOOC) coupled to the reduction of Mn(IV) or Fe(III) can occur in a spectrum of geologic settings. Examples of geologic case studies implied that the TOOC can steadily occur at temperatures below 200 degrees C. However, existing relevant experimental work was conducted at temperatures above 350 degrees C. Therefore, uncertainties remain over the reaction at lower temperatures. This study mainly adopted Raman spectroscopy combined with fused silica capillary capsules (FSCCs) to explore the thermochemical oxidation of methane, n-alkanes (here C13H25) and alcohol compounds (here CH3OH and C2H5OH) by MnO2 or Fe2O3 at relatively low temperatures. The results showed that the TOOC reaction can proceed efficiently at temperatures below 200 degrees C, which, to a large extent, decreased the temperature gap between experiments and geological cases. The onset temperature of TOOC is largely dependent on the species of organic matter. Expectedly, long chain n-alkane (C13H25), methanol (CH3OH) and ethanol (C2H5OH) show higher reactivity than CH4 and thus were readily oxidized by oxidants at lower temperatures. The results also implied that either the oxidation of organic components or the reduction of MnO2 proceeds by steps, during which a series of intermediate products are generated. The activation energy of the thermochemical oxidation of CH4 by manganese oxides was also estimated based on quantitative Raman spectroscopic analyses. Finally, we discussed the potential contributions of TOOC to the alteration of organic components, the modification of reservoir properties, the carbon cycles and other geological processes.
KeywordThermochemical oxidation Methane stability n-alkane and alcohol compounds Mn(IV) and Fe(III) oxides Reaction pathway Reaction kinetics
DOI10.1016/j.chemgeo.2020.119982
Indexed BySCI
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; China Scholarship Council (CSC)
Language英语
Funding ProjectNational Key Research and Development Program of China[2017YFC0603105] ; National Natural Science Foundation of China[41830425] ; National Natural Science Foundation of China[41573054] ; China Scholarship Council (CSC)
WOS KeywordSYNTHETIC FLUID INCLUSIONS ; FUSED-SILICA CAPILLARIES ; OIL-FIELD WATERS ; SULFATE REDUCTION ; ANAEROBIC OXIDATION ; ATMOSPHERIC METHANE ; HYDROTHERMAL VENTS ; AQUEOUS-SOLUTIONS ; ISOTOPIC EVIDENCE ; GEOCHEMICAL CHARACTERISTICS
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000600546500015
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/8488
Collection深海科学研究部_深海极端环境模拟研究实验室
Corresponding AuthorHu, Wenxuan; Wang, Xiaolin
Affiliation1.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposit Res, Nanjing 210023, Jiangsu, Peoples R China
2.Nanjing Univ, Sch Earth Sci & Engn, Inst Energy Sci, Nanjing 210023, Jiangsu, Peoples R China
3.Shandong Univ Sci & Technol, Shandong Prov Key Lab Deposit Mineralizat & Sedim, Qingdao 266590, Shandong, Peoples R China
4.CSIRO, ARRC, 26 Dick Perry Ave, Kensington, WA 6151, Australia
5.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Lab Expt Study Deep Sea Extreme Condit, Sanya 572000, Hainan, Peoples R China
6.Cent South Univ, Sch Geosci & Info Phys, Changsha 410083, Hunan, Peoples R China
Recommended Citation
GB/T 7714
Wan, Ye,Bourdet, Julien,Hu, Wenxuan,et al. Experimental investigations on the thermochemical oxidation of n-alkane and alcohol compounds by MnO2 and Fe2O3 at temperatures up to 325 degrees C[J]. CHEMICAL GEOLOGY,2021,559:14.
APA Wan, Ye.,Bourdet, Julien.,Hu, Wenxuan.,Kang, Xun.,Heath, Charles.,...&Wang, Xiaolin.(2021).Experimental investigations on the thermochemical oxidation of n-alkane and alcohol compounds by MnO2 and Fe2O3 at temperatures up to 325 degrees C.CHEMICAL GEOLOGY,559,14.
MLA Wan, Ye,et al."Experimental investigations on the thermochemical oxidation of n-alkane and alcohol compounds by MnO2 and Fe2O3 at temperatures up to 325 degrees C".CHEMICAL GEOLOGY 559(2021):14.
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