TY - JOUR
T1 - Influence of Loading a Tertiary Amine on Activated Carbons and Effect of CO2on Adsorptive H2S Removal from Biogas
AU - Quan, Wenying
AU - Jiang, Xiao
AU - Wang, Xiaoxing
AU - Song, Chunshan
N1 - Funding Information:
This work was supported in part by the USDA Northeast Sun Grant 5701-RU-SDSU-G640 and by the Pennsylvania State University through the Penn State-Dalian Joint Center for Energy Research. We are thankful to Dr. William Koros (School of Chemical and Biomolecular Engineering at Georgia Institute of Technology) for helpful discussion and valuable suggestions on this work. The XPS analysis was performed at the Materials Characterization Laboratory of the Penn State Materials Research Institute for which the assistance of Jeff Shallenberger is gratefully acknowledged. One of the authors (Wenying Quan) thankfully acknowledges the financial support from Chinese Scholarship Council (CSC), China.
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/7/13
Y1 - 2020/7/13
N2 - This work studied the influence of loading a tertiary amine on activated carbons (ACs) and the effect of CO2 on adsorptive H2S removal from biogas. After loading a tertiary amine, tetramethyl hexanediamine (THMDA), the H2S adsorption capacity increased for all ACs but with different levels. Detailed characterization results (TGA-MS, TGA/DTG, and in situ FT-IR) demonstrate the TMHDA-induced changes of surface oxygen or nitrogen functional groups, pH value, and textural properties and their impacts on H2S adsorption performance, which also varied with CO2 concentrations. On bare AC adsorbents, the H2S adsorption is attributed to the surface oxygen functional groups, whereas on tertiary amine-loaded ACs, the H2S adsorption is due to the interaction between H in H2S and N in the amine group. The presence of CO2 can promote H2S adsorption on some ACs and THMDA-loaded ACs. The formation of solid sulfur and CH4 was observed for the H2S adsorption in the presence of CO2.
AB - This work studied the influence of loading a tertiary amine on activated carbons (ACs) and the effect of CO2 on adsorptive H2S removal from biogas. After loading a tertiary amine, tetramethyl hexanediamine (THMDA), the H2S adsorption capacity increased for all ACs but with different levels. Detailed characterization results (TGA-MS, TGA/DTG, and in situ FT-IR) demonstrate the TMHDA-induced changes of surface oxygen or nitrogen functional groups, pH value, and textural properties and their impacts on H2S adsorption performance, which also varied with CO2 concentrations. On bare AC adsorbents, the H2S adsorption is attributed to the surface oxygen functional groups, whereas on tertiary amine-loaded ACs, the H2S adsorption is due to the interaction between H in H2S and N in the amine group. The presence of CO2 can promote H2S adsorption on some ACs and THMDA-loaded ACs. The formation of solid sulfur and CH4 was observed for the H2S adsorption in the presence of CO2.
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U2 - 10.1021/acssuschemeng.0c01132
DO - 10.1021/acssuschemeng.0c01132
M3 - Article
AN - SCOPUS:85088649786
VL - 8
SP - 9998
EP - 10008
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
SN - 2168-0485
IS - 27
ER -