TY - JOUR
T1 - High temperature removal of hydrogen sulfide using an N-150 sorbent
AU - Ko, T. H.
AU - Chu, H.
AU - Chaung, L. K.
AU - Tseng, T. K.
N1 - Funding Information:
The authors acknowledged gratefully Energy Commission, Ministry of Economic Affairs, R.O.C. for financial support under Contract 89-D0124.
PY - 2004/10/18
Y1 - 2004/10/18
N2 - In this study, an N-150 sorbent was used as a high temperature desulfurization sorbent for the removal of hydrogen sulfide from coal gas in a fixed bed reactor. The results indicate that the N-150 sorbent could be used for H 2S removal in the tested temperature ranges. Regeneration test also reveals that utilization of the N-150 sorbent maintains up to 85% compared to the fresh sorbent. No significant degeneration occurs on the N-150 sorbent. In addition, various concentrations of H 2S, H 2 and CO were also considered in the performance test of the N-150 sorbent. Except for H 2S, H 2 and CO act the important roles in the high temperature desulfurization. By increasing the H 2 concentration, the sulfur capacity of the sorbent decreases and an adverse result is observed in the case of increasing CO concentration. This can be explained via water-shift reaction. On the basis of the instrument analysis, X-ray powder diffraction determination and SEM images with EDS spectrum characterization, residual sulfur is found in the regenerated N-150 sorbent and this sulfur species is sulfate which resulted by incomplete regeneration. The sulfate formation and sintering effect are major reasons to cause activity loss in the sulfidation/regeneration cycles.
AB - In this study, an N-150 sorbent was used as a high temperature desulfurization sorbent for the removal of hydrogen sulfide from coal gas in a fixed bed reactor. The results indicate that the N-150 sorbent could be used for H 2S removal in the tested temperature ranges. Regeneration test also reveals that utilization of the N-150 sorbent maintains up to 85% compared to the fresh sorbent. No significant degeneration occurs on the N-150 sorbent. In addition, various concentrations of H 2S, H 2 and CO were also considered in the performance test of the N-150 sorbent. Except for H 2S, H 2 and CO act the important roles in the high temperature desulfurization. By increasing the H 2 concentration, the sulfur capacity of the sorbent decreases and an adverse result is observed in the case of increasing CO concentration. This can be explained via water-shift reaction. On the basis of the instrument analysis, X-ray powder diffraction determination and SEM images with EDS spectrum characterization, residual sulfur is found in the regenerated N-150 sorbent and this sulfur species is sulfate which resulted by incomplete regeneration. The sulfate formation and sintering effect are major reasons to cause activity loss in the sulfidation/regeneration cycles.
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U2 - 10.1016/j.jhazmat.2004.08.023
DO - 10.1016/j.jhazmat.2004.08.023
M3 - Article
C2 - 15511585
AN - SCOPUS:7044231663
SN - 0304-3894
VL - 114
SP - 145
EP - 152
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
IS - 1-3
ER -