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Cited by 44 publications
(4 citation statements)
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“…Early literature focused on H 2 S poisoning of metal catalysts and the threshold concentration below which H 2 S will not unduly poison a given metal catalyst. McCarty and Wise investigated the thermodynamics of H 2 S chemisorption on different metallic catalysts over a wide range of temperatures and reported the order of increasing activity toward H 2 S at 300 °C and 50% surface coverage to be Ni > Co > Ru > Fe > Pt. Using magnetization measurements, Den Besten and Selwood showed that H 2 S is dissociatively chemisorbed on the Ni surface . The enthalpy of adsorption of H 2 S on Ni was measured to be about 130–160 kJ/mol. , Due to such high enthalpies of adsorption, adsorbent regeneration will result in a very expensive natural gas desulfurization process.…”
Section: Adsorptionmentioning
confidence: 99%
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“…Early literature focused on H 2 S poisoning of metal catalysts and the threshold concentration below which H 2 S will not unduly poison a given metal catalyst. McCarty and Wise investigated the thermodynamics of H 2 S chemisorption on different metallic catalysts over a wide range of temperatures and reported the order of increasing activity toward H 2 S at 300 °C and 50% surface coverage to be Ni > Co > Ru > Fe > Pt. Using magnetization measurements, Den Besten and Selwood showed that H 2 S is dissociatively chemisorbed on the Ni surface . The enthalpy of adsorption of H 2 S on Ni was measured to be about 130–160 kJ/mol. , Due to such high enthalpies of adsorption, adsorbent regeneration will result in a very expensive natural gas desulfurization process.…”
Section: Adsorptionmentioning
confidence: 99%
“…164−167 Using magnetization measurements, Den Besten and Selwood showed that H 2 S is dissociatively chemisorbed on the Ni surface. 168 The enthalpy of adsorption of H 2 S on Ni was measured to be about 130−160 kJ/mol. 164,169 Due to such high enthalpies of adsorption, adsorbent regeneration will result in a very expensive natural gas desulfurization process.…”
Section: Metalsmentioning
confidence: 99%
“…The poisoning of the nickel catalyst may occur even when the concentration of hydrogen sulfide ought not to cause the formation of a bulk compound of sulfur and nickel. Therefore, hydrogen sulfide may be assumed to be retained by a chemisorption process. According to previous studies, the loss of activity of Ni-based catalysts through sulfur compounds can be due to ,, (1) strong sulfur chemisorption on the nickel surface, which prevents the further adsorption of reactant molecules H 2 S + Ni surface Ni surface normalS + H 2 and (2) the reconstruction of the Ni surface (i.e., sulfur can modify the chemical nature of the active sites or result in the formation of new compounds), which may modify or decrease the adsorption rates of reactant gases.…”
Section: Theorymentioning
confidence: 99%
“…Catalysts which have been designed for partial oxidation influence the reaction by lowering the activation barriers that lead to increased reaction rates, conversions and altered product compositions, including carbon. Both carbon formation and inactive metal sulfide formation have been linked to active sites of high coordination and low dispersion (10,11,12,13). Therefore, the design of a carbon deposition resistant catalyst for middle distillate partial oxidation would have to have active sites that are not only well dispersed, but of low coordination.…”
Section: Introductionmentioning
confidence: 99%