Sorptive Removal of Hydrogen Sulfide from Gas Streams by an Mg‐Al Layered Double Hydroxide

Abstract

Mg-Al layered double hydroxides (Mg-Al LDHs) were used as an adsorbent for hydrogen sulfide (H 2 S) removal. Removal efficiency of H 2 S by the MgAl LDH has been investigated at different temperatures and humidity. The results have shown Mg-Al LDH to be highly promising as an adsorbent for H 2 S removal. Research results about sorption mechanisms indicate that at lower temperatures (20 ºC), H 2 S removal by Mg-Al LDHs is mainly a physical sorption process; however, at higher temperature (> 40 ºC), it is dominated by chemical reactions involving ion exchange. Confirmation of the redox reaction between H 2 S and Mg-Al LDHs was provided by XPS data. The results obtained demonstrate that the H 2 S removal efficiency of Mg-Al LDHs increases with the temperature increasing, and decreases with the water vapour content increasing.

Removal of hydrogen sulfide in the gas phase by carbide slag modified bentonite

“…Comparison of the correlation coefficients in Table 2 shows that the data were best-tted by the Freundlich equation, implying that H 2 S sorption is a surface sorption process. 21 The Langmuir model is described by eqn (2):…”

The effect of cerium incorporation on the catalytic performance of cobalt and manganese containing layer double oxides for acetone oxidation

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“…The cleaning method of water washing series alkaline washing can effectively remove P 4 , CO 2 , H 2 S and HF in the yellow phosphorus tail gas [11] , but phosphine can not be removed. Activated charcoal method [12] , catalytic oxidation method [13][14][15] has good removal of phosphine in yellow phosphorus tail, but the process is long, need heated and regenerated catalyst, which influences their industrial application. Complex Temperature Swing Adsorption and Pressure Swing Adsorption method [16] to purification the yellow phosphorus tail gas have a bigger investment, energy consumption, which affects its large-scale applications.…”