Preparation of economical sorbents for SO2 and NOx removal using coal washery reject

Lu G.Q. and Do D.D. (1991) Preparation of economical sorbents for SO2 and NOx removal using coal washery reject. Carbon, 29 2: 207-213. doi:10.1016/0008-6223(91)90071-P


Author Lu G.Q.
Do D.D.
Title Preparation of economical sorbents for SO2 and NOx removal using coal washery reject
Journal name Carbon   Check publisher's open access policy
ISSN 0008-6223
Publication date 1991-01-01
Sub-type Article (original research)
DOI 10.1016/0008-6223(91)90071-P
Volume 29
Issue 2
Start page 207
End page 213
Total pages 7
Subject 2505 Materials Chemistry
Abstract In the present study, coal washery reject, which is a solid waste material generated in coal preparation processes, is utilized to prepare carbonaceous sorbents for removal of pollutant gases SO2 and NOx from flue gases. The pyrolyzed char is activated with CO2 in order to improve its surface area needed for adsorption. An accelerated Surface Area and Porosimetry instrument (Micromeritics, ASAP 2000) is used to characterize the pyrolyzed and activated chars. It is found that the optimal temperature for pyrolysis is around 550°C, at which a maximum specific surface area of the char is acquired. The pyrolyzed coal reject char was then activated with carbon dioxide for various times at 900°C. A maximum surface area of the char appears as the carbon burns off in the course of reaction. The adsorption performance of the coal reject char for SO2 and NOx was determined using a TGA technique, and it showed that maximum adsorption capacities for SO2 and NOx occur at different carbon burn-offs.
Keyword activation
Coal washery reject
micropore surface
SO2 and NOx adsorption
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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