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Breaking the limits of structural and mechanical imaging of the heterogeneous structure of coal macerals
Date Issued
2014-10-09
Date Available
2015-10-09T03:00:11Z
Abstract
The correlation between local mechanical (elasto-plastic) and structural (composition) properties of coal presents significant fundamental and practical interest for coal processing and for the development of rheological models of coal to coke transformations. Here, we explore the relationship between the local structural, chemical composition, and mechanical properties of coal using a combination of confocal micro-Raman imaging and band excitation atomic force acoustic microscopy for a bituminous coal. This allows high resolution imaging (10s of nm) of mechanical properties of the heterogeneous (banded) architecture of coal and correlating them to the optical gap, average crystallite size, the bond-bending disorder of sp2 aromatic double bonds, and the defect density. This methodology allows the structural and mechanical properties of coal components (lithotypes, microlithotypes, and macerals) to be understood, and related to local chemical structure, potentially allowing for knowledge-based modeling and optimization of coal utilization processes.
Other Sponsorship
Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy
UCD Research
Asylum Research
Type of Material
Journal Article
Publisher
IOP Publishing
Journal
Nanotechnology
Volume
25
Issue
43
Copyright (Published Version)
2014 IOP Publishing Ltd.
Language
English
Status of Item
Peer reviewed
This item is made available under a Creative Commons License
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