Breaking the limits of structural and mechanical imaging of the heterogeneous structure of coal macerals

被引：18

作者：

Collins, L. ^{[1
,2
]}

Tselev, A. ^{[3
]}

Jesse, S. ^{[3
]}

Okatan, M. B. ^{[3
]}

Proksch, R. ^{[4
]}

Mathews, J. P. ^{[5
,6
]}

Mitchell, G. D. ^{[6
]}

Rodriguez, B. J. ^{[1
,2
]}

Kalinin, S. V. ^{[3
]}

Ivanov, I. N. ^{[3
]}

机构：

[1] Univ Coll Dublin, Sch Phys, Dublin 4, Ireland

[2] Univ Coll Dublin, Conway Inst Biomed & Biomol Res, Dublin 4, Ireland

[3] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[4] Asylum Res Oxford Instruments Co, Santa Barbara, CA 93117 USA

[5] Penn State Univ, Leone Family Dept Energy & Mineral Engn, University Pk, PA 16802 USA

[6] Penn State Univ, EMS Energy Inst, University Pk, PA 16802 USA

来源：

NANOTECHNOLOGY | 2014年 / 25卷 / 43期

关键词：

coal; mechanical properties; macerals; atomic force acoustic microscopy; confocal micro-Raman imaging; MICRO-RAMAN SPECTROSCOPY; ATOMIC-FORCE MICROSCOPY; ACOUSTIC MICROSCOPY; GRAPHITE FORMATION; OPTICAL-PROPERTIES; REFLECTANCE; VITRINITE; GRAPHITIZATION; CARBON; ANTHRACITES;

D O I：

10.1088/0957-4484/25/43/435402

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 sp(2) 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.

引用

页数：9

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