Preparation and desulfurization performance of LaMeOx/SBA-15 for hot coal gas

CeO 2 –MnO x /ZSM-5 sorbents for H 2 S removal at high temperature

“…The major peaks of Mn 2p shift to high binding energies, suggesting the reduction of Mn 3+ to Mn 2+ during desulphurization. In addition, two peaks centered at 165.0 and 171.4 eV are attributed to the signals of S 2p 3/2 in sulfides and sulfates, respectively [3]. The peaks centered at 533.2 and 529.2 eV of O 1s spectra in fresh sample are attributed to the oxygen in SiO 2 [46], CeO 2 and Mn 2 O 3 [47,48], respectively.…”

“…S BET S exter S inter V total V micro X micro D aver D max m 2 /g m 2 /g m 2 /g mm 3 /g mm 3 The H 2 -TPR profiles for xCeyMn/ZSM-5 are presented in Fig. 6.…”

“…The conventional techniques for H 2 S removal such as wet absorption can only occur at much lower temperature than gasification temperature (>1000°C). Thus, the hot coal gas ($800-900°C) has to be cooled down to ambient temperature for sulfur removal and then heated up to a required temperature for burning in gas turbine [3]. To improve the thermal efficiency and lower the capital costs of IGCC system, solid sorbents, such as Fe 2 O 3 [4], CuO [5], and MnO x [6], which can adsorb H 2 S at high temperature, would be a better option for hot coal gas desulphurization.…”

Highly stable and regenerable Mn-based/SBA-15 sorbents for desulfurization of hot coal gas

“…Recently, conventional methods, such as wet limestone [3] and ammonia scrubber desulfurization [4] are unfavorable for reducing operation capital from the economic point of view. Therefore, the oxides of Fe, Zn, Ca, Mg, and Co as regenerative sorbents for hot coal gas desulfurization are studied extensively in recent years [5][6][7][8][9][10][11][12][13]. However, sintering, mechanical pulverization and reductive properties at temperature higher than 700 • C limited the application of aforementioned metal oxides.…”

High-temperature desulfurization of hot coal gas on Mo modified Mn/KIT-1 sorbents

“…The flow rates of feed gas were controlled by a mass flowmeter (D07-7B/ZM, Beijing Seven-star Electronics Co., Ltd., China). A thermocouple placed in the center of the sorbent bed was used to measure the reaction temperature [38]. The sorbent bed was heated to the reaction temperature at the rate of 10°C/min in a N 2 atmosphere.…”