Hydrogen sulfide adsorption behavior

Although the purpose of this investigation was to study the initial transient behavior of heatless adsorption, the best removal of hydrogen sulfide occurred in the run with 3.01% H S and a y = 2.88, cycle time of 12 minutes and feed rate of 190 sCCM. Removal was down to 99.55% in three hours. For the 6.32% feed the best removal for the same time period was 98.49%. 

Shekhovtsova and Fomkin [41] developed a discrete site model to describe the adsorption of methane on microporous adsorbents. The model was tested with adsorption on zeoUte NaX and an activated carbon. A sharp decrease in the heats of adsorption was observed at high adsorbed amounts even in the supercritical temperature range. A multilayer adsorption theory was developed by Wang and Hwang [42] to describe the behavior of several adsorbates on activated carbons. The adsorbates employed included several alkanes, hydrogen sulfide, and carbon monoxide. The isosteric heats of adsorption for all gases were determined using the Clausius-Clapeyron equation. 

Similar behavior of other aromatic disulfides and thiols on gold electrodes has been described based on the SERS experiments [167]. Adsorption of benzenethiol, benzenemethanethiol, p-cyanobenzenemethanethiol, diphenyl sulfide, and dibenzyl sulfide was studied on the roughened gold electrode. All these species adsorb dissociatively as the corresponding thiolates. Monolayers formed from symmetric disulfides were exactly like those formed from the corresponding thiols. These monolayers were stable in a wide potential window from -1-800 to —1000 mV (versus SCE), which was limited by the oxidation of the Au surface from the positive side and hydrogen evolution at —1000 to —1200 mV at the negative side. 

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