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

Abstract

The correlation between local mechanical (elasto-plastic) and structural (composition) properties of coal presents significant fundamental and practical interest for coal processing and the development of rheological models of coal to coke transformations and for advancing novel approaches. 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 (BE-AFAM) 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 hence 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 modelling and optimization of coal utilization processes.

Authors:
 [1];  [2];  [2];  [2];  [3];  [4];  [4];  [1];  [2];  [2]
  1. Univ. College Dublin (Ireland)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Oxford Research Company, Santa Barbara, CA (United States)
  4. Pennsylvania State Univ., University Park, PA (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1408673
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Nanotechnology
Additional Journal Information:
Journal Volume: 25; Journal Issue: 43; Journal ID: ISSN 0957-4484
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Collins, L., Tselev, A., Jesse, S., Okatan, M. B., Proksch, R., Mathews, J. P., Mitchell, G. D., Rodriguez, B. J., Kalinin, S. V., and Ivanov, I. N. Breaking the limits of structural and mechanical imaging of the heterogeneous structure of coal macerals. United States: N. p., 2014. Web. doi:10.1088/0957-4484/25/43/435402.
Collins, L., Tselev, A., Jesse, S., Okatan, M. B., Proksch, R., Mathews, J. P., Mitchell, G. D., Rodriguez, B. J., Kalinin, S. V., & Ivanov, I. N. Breaking the limits of structural and mechanical imaging of the heterogeneous structure of coal macerals. United States. doi:10.1088/0957-4484/25/43/435402.
Collins, L., Tselev, A., Jesse, S., Okatan, M. B., Proksch, R., Mathews, J. P., Mitchell, G. D., Rodriguez, B. J., Kalinin, S. V., and Ivanov, I. N. Thu . "Breaking the limits of structural and mechanical imaging of the heterogeneous structure of coal macerals". United States. doi:10.1088/0957-4484/25/43/435402.
@article{osti_1408673,
title = {Breaking the limits of structural and mechanical imaging of the heterogeneous structure of coal macerals},
author = {Collins, L. and Tselev, A. and Jesse, S. and Okatan, M. B. and Proksch, R. and Mathews, J. P. and Mitchell, G. D. and Rodriguez, B. J. and Kalinin, S. V. and Ivanov, I. N.},
abstractNote = {The correlation between local mechanical (elasto-plastic) and structural (composition) properties of coal presents significant fundamental and practical interest for coal processing and the development of rheological models of coal to coke transformations and for advancing novel approaches. 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 (BE-AFAM) 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 hence 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 modelling and optimization of coal utilization processes.},
doi = {10.1088/0957-4484/25/43/435402},
journal = {Nanotechnology},
issn = {0957-4484},
number = 43,
volume = 25,
place = {United States},
year = {2014},
month = {10}
}