Removal of Hydrogen Sulfide from Gas Streams Using Porous Materials: A Review

Abstract

Removal of hydrogen sulfide (H2S) released from various source processes is crucial because this compound can cause corrosion and environmental damage even at low concentration levels. The porous materials offer a wide variety of chemical architectures with tunable pore size and high surface area that are very promising for the adsorption of H2S molecules. This review attempts to comprehensively compile the current studies in the literature on hydrogen sulfide removal in gas purification processes using highly porous materials such as zeolites, carbon materials, activated carbon, porous metal oxides, mesoporous silica, and metal–organic frameworks as highly effective adsorbents. Possible interactions between the H2S and active adsorption sites of these materials are also discussed. Surface functionality and porosity play a crucial role in the H2S removal performance by virgin or modified porous materials. However, tailoring these materials to obtain high adsorption capacity, good selectivity, and suitable stability and regenerability and to retain structural integrity under high temperatures or in the presence of moisture are still the major challenges in the practical applications. According to the extensive background knowledge for H2S removal by different porous materials in this review, it can be expected that readers will gain insight into the further developments in this area and the design of new cost-effective sorbents.

Capture of toxic gases in MOFs: SO2, H2S, NH3 and NOx

“…59 MOFs have been visualised for the capture of H 2 S; however, most of them have shown poor chemical stability in its presence. 60 Nonetheless, chemically stable MOF materials have demonstrated promising results in the reversible capture of H 2 S. 61 This section highlights outstanding MOF materials that have shown high H 2 S capture performances and in situ H 2 S transformations, as well as biomedical applications.…”

Adsorption of Hydrogen Sulfide at Low Temperatures Using an Industrial Molecular Sieve: An Experimental and Theoretical Study

“… 28 Generally, zeolites containing lower Si/Al ratios tend to adsorb polar substances and are more hydrophilic, while zeolites with higher Si/Al ratios are hydrothermally stable and more hydrophobic in comparison and thus can potentially favor the adsorption of nonpolar molecules. 29 , 30 …”

Hydrogen Sulfide (H2S) Removal via MOFs

“…To predict these basal interactions density functional theory (DFT) and grand canonical Monte Carlo simulations (GCMC) have been widely implemented by numerous works, as will be discussed throughout the text below. Although the topic of desulfurization using MOFs has been thoroughly reviewed in the past [41][42][43][44][45][46][47][48], the work presented herein is the first to collect and critically review all works found in the literature that focus exclusively on H 2 S capture. As such, attention has been paid to the structural characteristics of these materials that provide significant advantages in H 2 S selectivity and separation, but also to issues related to the reversibility of the process.…”