The effect of oxidative treatment on soluble compounds from Australian coal

Webster, J; Lee, M; Gurba, LW; Manefield, M; Thomas, T

The effect of oxidative treatment on soluble compounds from Australian coal

Webster, J Lee, M Gurba, LW Manefield, M Thomas, T

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Fuel, 2019, 257, pp. 116071
Issue Date:: 2019-12-01

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Field	Value	Language
dc.contributor.author	Webster, J
dc.contributor.author	Lee, M
dc.contributor.author	Gurba, LW
dc.contributor.author	Manefield, M
dc.contributor.author	Thomas, T
dc.date.accessioned	2022-09-11T20:51:02Z
dc.date.available	2022-09-11T20:51:02Z
dc.date.issued	2019-12-01
dc.identifier.citation	Fuel, 2019, 257, pp. 116071
dc.identifier.issn	0016-2361
dc.identifier.uri	http://hdl.handle.net/10453/161680
dc.description.abstract	The production of biogenic methane from coal has been observed through isotope analysis of coal bed methane (CBM). Microbial degradation of coal leads to the production of chemical compounds, which, under anaerobic conditions, can be biologically converted into methane. However, the types of coal compounds accessible to these microbial processes are poorly defined. This study aims to define the nature of chemical compounds released from coal under oxidative conditions. Coal from three different coal seams were extracted and released compounds were analysed with GC–MS and H-NMR. Coals were then exposed to hydrogen peroxide, calcium peroxide and peroxidase, which mimic microbial oxidation. Our analysis showed that the three coals shared around half of their apolar, mobile compounds, including alkanes ranging from C11 to C27 and methylated variations thereof, as well as poly-aromatic hydrocarbons, such as methylated naphthalenes, phenanthrenes and fluorenes. Oxidative treatments of coal caused significant changes in chemical profiles compared to untreated coal. All treatments resulted in the production of propionate, an important substrate for syntrophic methanogenesis. However, there were also qualitative and quantitative differences in the polar compounds produced during enzymatic and peroxide treatments. These results show how different chemical and enzymatic processes that are relevant to microbial oxidation will produce distinct profiles in intermediate metabolites that will likely then determine the subsequent pathways of microbial methane production.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Fuel
dc.relation.isbasedon	10.1016/j.fuel.2019.116071
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0306 Physical Chemistry (incl. Structural), 0904 Chemical Engineering, 0913 Mechanical Engineering
dc.subject.classification	Energy
dc.title	The effect of oxidative treatment on soluble compounds from Australian coal
dc.type	Journal Article
utslib.citation.volume	257
utslib.for	0306 Physical Chemistry (incl. Structural)
utslib.for	0904 Chemical Engineering
utslib.for	0913 Mechanical Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
utslib.copyright.status	closed_access	*
dc.date.updated	2022-09-11T20:50:59Z
pubs.publication-status	Published
pubs.volume	257

Abstract:

The production of biogenic methane from coal has been observed through isotope analysis of coal bed methane (CBM). Microbial degradation of coal leads to the production of chemical compounds, which, under anaerobic conditions, can be biologically converted into methane. However, the types of coal compounds accessible to these microbial processes are poorly defined. This study aims to define the nature of chemical compounds released from coal under oxidative conditions. Coal from three different coal seams were extracted and released compounds were analysed with GC–MS and H-NMR. Coals were then exposed to hydrogen peroxide, calcium peroxide and peroxidase, which mimic microbial oxidation. Our analysis showed that the three coals shared around half of their apolar, mobile compounds, including alkanes ranging from C11 to C27 and methylated variations thereof, as well as poly-aromatic hydrocarbons, such as methylated naphthalenes, phenanthrenes and fluorenes. Oxidative treatments of coal caused significant changes in chemical profiles compared to untreated coal. All treatments resulted in the production of propionate, an important substrate for syntrophic methanogenesis. However, there were also qualitative and quantitative differences in the polar compounds produced during enzymatic and peroxide treatments. These results show how different chemical and enzymatic processes that are relevant to microbial oxidation will produce distinct profiles in intermediate metabolites that will likely then determine the subsequent pathways of microbial methane production.

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http://hdl.handle.net/10453/161680