Structure changes of coal reject char during pyrolysis at low heating rates

Lu G.Q. and Do D.D. (1991) Structure changes of coal reject char during pyrolysis at low heating rates. Fuel Processing Technology, 28 3: 247-258. doi:10.1016/0378-3820(91)90078-Q


Author Lu G.Q.
Do D.D.
Title Structure changes of coal reject char during pyrolysis at low heating rates
Journal name Fuel Processing Technology   Check publisher's open access policy
ISSN 0378-3820
Publication date 1991
Sub-type Article (original research)
DOI 10.1016/0378-3820(91)90078-Q
Volume 28
Issue 3
Start page 247
End page 258
Total pages 12
Subject 1605 Policy and Administration
2102 Curatorial and Related Studies
2103 Historical Studies
Abstract Pyrolysis of coal reject in an inert atmosphere is the first step of preparing a sorbent from this material. In this paper, studies on the physical structural changes and pore surface area and volume distribution of coal reject char during pyrolysis are presented. The effects of acid treatment, heating rate and temperature on the pore structural evolution are experimentally investigated. A thermogravimetric analyzer is used for the pyrolysis of coal reject in nitrogen to prepare the pyrolyzed char. Characterization of pore structure of the resulted chars is carried out using an accelerated surface area and porosimetry (ASAP 2000) system. The results showed that the generation, enlargement and coalescence of pores in the carbonaceous matrix of the coal reject are closely related to the physical structural changes such as softening, swelling and shrinking of the particle during pyrolysis. The heating rate of the particle during pyrolysis is an important factor influencing both micropore and mesopore structure. The effect of heating rate is mainly due to the effect of heating rate on softening and swelling. HCl treatment of the raw coal reject was found to modify the thermoplasticity of the particle, which results in a substantial increase of micropore surface area of the pyrolyzed char.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 14 Jun 2016, 01:16:18 EST by System User