Mesoporous Zn-Fe-based binary metal oxide sorbent with sheet-shaped morphology: Synthesis and application for highly efficient desulfurization of hot coal gas

Low-Temperature Highly Efficient and Selective Removal of H2S over Three-Dimensional Zn–Cu-Based Materials in an Anaerobic Environment

“…In recent years, various desulfurizers have been widely explored to capture H 2 S with the participation of oxygen in a relatively wide temperature region. , Transition metal oxides and rare earth oxides loaded on various porous materials show a satisfactory desulfurization performance at medium and high temperatures. , However, the performance of these sorbents drops rapidly to less than 50 mg/g in the absence of oxygen gas. − In fact, it is recognized that metal oxide sorbents act as catalysts in capturing hydrogen sulfide with the presence of oxygen gas. , Moreover, a large number of studies have also proved that the desulfurization performance of sorbents under dry conditions is much lower than that in the presence of water vapor. , As reported, the presence of water in the desulfurization system has a positive effect, which has been proven to enhance the hydrolysis of H 2 S . In general, there is a lack of research on selective desulfurization under the conditions of low temperature, dry, and anaerobic, which is an urgent problem to be solved in metallurgy and chemical industries.…”

“…3,4 In recent years, various desulfurizers have been widely explored to capture H 2 S with the participation of oxygen in a relatively wide temperature region. 5,6 Transition metal oxides and rare earth oxides loaded on various porous materials show a satisfactory desulfurization performance at medium and high temperatures. 7,8 However, the performance of these sorbents drops rapidly to less than 50 mg/g in the absence of oxygen gas.…”

Structure Characteristics and Hot-Coal-Gas Desulfurization Properties of Zn-Based Sorbents Supported on Mesoporous Silica with Different Pore-Arrangement Patterns: A Comparison Study

“…The aforementioned coal-derived gas can serve as the feedstock for chemical production and can be used as fuel gas for advanced power-generation systems such as the integrated gasification combined cycle (IGCC) and fuel cell. However, the coal-derived gas contains a sulfur-containing compound, mainly as H 2 S, and H 2 S has detrimental effects such as corrosion of blades in the gas turbine, poisoning of the anode catalyst in the fuel cell, and deactivation of the catalyst for catalytic synthesis of chemicals . Consequently, the removal of H 2 S to required levels is an essential step before the utilization of coal-derived gas.…”

“…have great affinity toward H 2 S at middle and high temperatures . Furthermore, the ZnO–H 2 S reaction has highly favorable thermodynamics, yielding a very low equilibrium concentration of H 2 S. , As a consequence, ZnO has been widely studied as the major active component in sorbents for desulfurization of hot coal gas.…”

Enabling High Efficiency and Rapid Regeneration of α-FeOOH@Fe-EDTA for Slurry Desulfurization

“…are of particular interest due to their inexpensiveness, nontoxicity, and ability to easily be regenerated. , Traditional Fe-based desulfurization technologies, including separation, adsorption, selective oxidation, and hydrodesulfurization, have been developed for H 2 S removal. Among which, the elimination of H 2 S by an Fe-based sorbent has been widely used in recent years. ,− For example, Gong et al prepared a series of FeOOH by different raw materials. Results show that α-FeOOH synthesized by the ammonium bicarbonate sedimentation method possesses the best desulfurization performance.…”