Effect of rheological properties of mesophase pitch and coal mixtures on pore development in activated carbon discs with high compressive strength

Gao, Shuai and Villacorta, Byron S. and Ge, Lei and Steel, Karen and Rufford, Thomas E. and Zhu, Zhonghua (2018) Effect of rheological properties of mesophase pitch and coal mixtures on pore development in activated carbon discs with high compressive strength. Fuel Processing Technology, 177. pp. 219-227. ISSN 0378-3820

Abstract

We measured the rheological properties of mesophase pitch + coal mixtures at temperatures up to 873 K and used quench tests during carbonization to observe the effects of coal particles on foaming and pore development in activated carbon discs (ACD). We observed that high ratios of coal to pitch increased the mixture's viscosity in a low pressure foaming process, which restricted growth of large bubbles during foaming and produced stronger carbon monoliths. The highest strength ACD, with compressive strength of 56 +/- 3 MPa, was obtained using a pitch to coal mass ratio of 1:2 (bulk density = 0.91 g.cm(-3) and surface area = 579 +/- 37 m(2.)g(-1)). The adsorption capacities of CO2, CH4, and N-2 of the ACDs prepared with a mesophase pitch to coal ratio of 1:2, measured on a gravimetric adsorption apparatus, at 298 K and pressures up to 4000 kPa were 3751 mol.m(-3) CO2, 2107 mol.m(-3) CH4, and 1691 mo.m(-3) N-2. These adsorption results suggest the activated carbon discs have potential as structured adsorbents for gas separation or storage applications.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials
Date Deposited: 29 Jan 2019 04:22
Last Modified: 05 Feb 2019 01:38
Uncontrolled Keywords: mesophase pitch; activated carbon; coal; carbon monoliths; adsorption; pore development
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030301 Chemical Characterisation of Materials
09 Engineering > 0904 Chemical Engineering > 090401 Carbon Capture Engineering (excl. Sequestration)
Socio-Economic Objective: D Environment > 96 Environment > 9603 Climate and Climate Change > 960302 Climate Change Mitigation Strategies
E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1016/j.fuproc.2018.04.032
URI: http://eprints.usq.edu.au/id/eprint/34821

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