Abstract
Microwave was applied to the high-temperature removal of H2S by a Fe-based sorbent supported on active coke (Fe2O3/AC). The influence of the loading content, adsorption temperature, and desulfurization way on the sulfidation properties of sorbents was investigated. N2 adsorption, X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy techniques were used to characterize the structure of sorbents before and after desulfurization. The results reveal that the microwave sulfidation performs best at 600 °C, while a further increase of the temperature leads to a lower sulfur capacity and utilization rate of Fe2O3 as a result of the pore structure deteriorating sorbents. The Boltzmann function is suitable for describing the H2S evolution behavior of the Fe2O3/AC sorbent bed. Several advantages of microwave sulfidation over the conventional way are as follows: much better performance of Fe2O3/AC sorbents, less decline in surface area and pore volume per unit sulfur capacity when rem...
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