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Selection and preparation of CO 2 sorbent for sorption‐enhanced steam reforming process of raw coke oven gas
Author(s) -
Xie Huaqing,
Yu Qingbo,
Lu Han,
Ji Liang,
Chen Hao,
Qin Qin
Publication year - 2018
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.13067
Subject(s) - sorbent , sorption , calcination , adsorption , raw material , thermogravimetric analysis , desorption , materials science , steam reforming , coke , yield (engineering) , chemical engineering , chemistry , waste management , metallurgy , catalysis , organic chemistry , hydrogen production , engineering
The study on CO 2 sorbent to be used in the sorption‐enhanced steam reforming process of raw coke oven gas (RCOG) was performed via thermodynamic and experimental analysis in this article. From the thermodynamic analysis, CaO showed the highest CO 2 adsorption capacity in the SR reaction temperature zone of RCOG and the best CO 2 desorption efficiency at the higher temperature among eight candidate metal‐oxides, and thus was selected as the active component of CO 2 sorbent. Then, the CaO‐based sorbents were prepared with Ca 12 Al 14 O 33 as carrier and their adsorption performances were tested via thermogravimetric experiment. Under the preparation conditions with the calcined time of 4 h, the calcined temperature of 900°C and the CaO content of 75%, the sorbent sample showed the better CO 2 adsorption and cycle stability than the other prepared samples and pure CaO, with its adsorption capacity reaching 47.38%. From the sorption‐enhanced steam reforming experiments, the addition of the selected sorbent can obviously improve the H 2 yield, with its concentration approaching 100%, and the optimal reforming temperature was deceased, with the H 2 yield obtaining 83.76% at 800°C. © 2018 American Institute of Chemical Engineers Environ Prog, 38: 89–97, 2019