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High‐temperature pyrolysis and CO 2 gasification of Victorian brown coal and Rhenish lignite in an entrained flow reactor
Author(s) -
Tanner Joanne,
Bhattacharya Sankar,
Bläsing Marc,
Müller Michael
Publication year - 2016
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.15198
Subject(s) - char , coal , pyrolysis , syngas , volume (thermodynamics) , underground coal gasification , yield (engineering) , tar (computing) , flow (mathematics) , chemistry , mineralogy , coal gasification , waste management , chemical engineering , materials science , metallurgy , thermodynamics , engineering , organic chemistry , mechanics , catalysis , physics , computer science , programming language
The low rank coals from Victoria, Australia, and Rhineland, Germany are of interest for use in entrained flow gasification applications. Therefore, a high temperature, electrically heated, entrained flow apparatus has been designed to address the shortage of fundamental data. A Victorian brown coal and a Rhenish lignite were subjected to rapid, entrained flow pyrolysis between 1100 and 1400°C to generate high surface area chars, which were subsequently gasified at the same temperatures under CO 2 in N 2 between 10 and 80 vol %. The Victorian coal was more reactive than the Rhenish coal, and peak char reactivity was observed at 1200°C. Char conversion and syngas yield increased with increasing temperature and plateaued at high CO 2 concentration. Ammonia and tar species were negligible and HCN and H 2 S were present in parts per million (volume) concentrations in the cooled, filtered syngas. © 2016 American Institute of Chemical Engineers AIChE J , 62: 2101–2111, 2016