Catalytic combustion of methane over palladium supported on alumina and silica in presence of hydrogen sulfide

Hoyos, Luis Javier; Praliaud, H.; Primet, Michel

doi:10.1016/0926-860x(93)80028-o

Cited by 111 publications

(88 citation statements)

References 22 publications

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“…In some cases [17,20,25,26], residual activities of fully poisoned PdO/Al 2 O 3 catalysts are observed. Two explanations can be found for this effect:…”

Section: Literature Overviewmentioning

confidence: 99%

“…Hoyos et al [17] showed that the deactivation rate of From their own results and from literature data the authors proposed a deactivation mechanism of three consecutive reaction steps -the formation of sulfide (eq. 2), its oxidation to sulfite (eq.…”

Section: Literature Overviewmentioning

confidence: 99%

“…Due to the chemisorption reaction, sulfur forms chemical bonds with the active sites hindering desorption at typical operating conditions. Gradually, the catalyst is poisoned [17,25].…”

Section: Literature Overviewmentioning

confidence: 99%

“…• The sulfur covered active compound (PdSO x ) itself features some catalytic activity for methane oxidation [17,26] or…”

Section: Literature Overviewmentioning

confidence: 99%

“…In the majority of available literature, the influence of H 2 S and SO 2 [17][18][19] on the activity of noble metal catalysts for catalytic combustion of methane is studied. Deactivation by SO 2 or H 2 S are usually not treated separately [20], since under typical reaction conditions of methane combustion (T > 350 °C, oxygen excess) hydrogen sulfide is oxidized to SO 2 [21].…”

Section: Introductionmentioning

confidence: 99%

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Studies on the influence of H 2 S and SO 2 on the activity of a PdO/Al 2 O 3 catalyst for removal of oxygen by total oxidation of (bio-)methane at very low O 2 :CH 4 ratios

Ortloff

Bohnau

Kramar

et al. 2016

Applied Catalysis B: Environmental

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This work focuses on the deactivation and in-situ regeneration effects of a commercial PdO/Al 2 O 3 catalyst for removal of oxygen by oxidation of CH 4 at low O 2 :CH 4 ratios when hydrogen sulfide and sulfur dioxide are applied. The experimental work is carried out at an operating temperature range of 200 °C < T < 300 °C, atmospheric pressures and H 2 S contents of < 50 ppmv. SO 2 and H 2 S show a different behavior in the examined range of operating conditions. Due to the low operating temperatures and low oxygen contents applied in this work, it was possible to identify an intermediate species, presumably PdSO 3 , with an increased activity for the oxidation of methane. This stands in contrast to the literature, where SO 2 typically causes catalyst deactivation. Based on the experimental results, a reaction scheme was derived and kinetic measurements for each of the participating reactions were carried out separately.

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“…In some cases [17,20,25,26], residual activities of fully poisoned PdO/Al 2 O 3 catalysts are observed. Two explanations can be found for this effect:…”

Section: Literature Overviewmentioning

confidence: 99%

Section: Literature Overviewmentioning

confidence: 99%

“…Due to the chemisorption reaction, sulfur forms chemical bonds with the active sites hindering desorption at typical operating conditions. Gradually, the catalyst is poisoned [17,25].…”

Section: Literature Overviewmentioning

confidence: 99%

“…• The sulfur covered active compound (PdSO x ) itself features some catalytic activity for methane oxidation [17,26] or…”

Section: Literature Overviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Studies on the influence of H 2 S and SO 2 on the activity of a PdO/Al 2 O 3 catalyst for removal of oxygen by total oxidation of (bio-)methane at very low O 2 :CH 4 ratios

Ortloff

Bohnau

Kramar

et al. 2016

Applied Catalysis B: Environmental

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Chemical and Biochemical Sensors, 1. Fundamentals

Bârsan

Gauglitz

Oprea

et al. 2016

Ullmann's Encyclopedia of Industrial Chemistry

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Engineered Sulfur‐Resistant Catalyst System with an Assisted Regeneration Strategy for Lean‐Burn Methane Combustion

et al. 2018

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Catalytic combustion of methane, the main component of natural gas, is a challenge under lean‐burn conditions and at low temperatures owing to sulfur poisoning of the Pd‐rich catalyst. This paper introduces a more sulfur‐resistant catalyst system that can be regenerated during operation. The developed catalyst system lowers the barrier that has restrained the use of liquefied natural gas as a fuel in energy production.

show abstract

Catalytic combustion of methane over palladium supported on alumina and silica in presence of hydrogen sulfide

Cited by 111 publications

References 22 publications

Studies on the influence of H 2 S and SO 2 on the activity of a PdO/Al 2 O 3 catalyst for removal of oxygen by total oxidation of (bio-)methane at very low O 2 :CH 4 ratios

Studies on the influence of H 2 S and SO 2 on the activity of a PdO/Al 2 O 3 catalyst for removal of oxygen by total oxidation of (bio-)methane at very low O 2 :CH 4 ratios

Chemical and Biochemical Sensors, 1. Fundamentals

Engineered Sulfur‐Resistant Catalyst System with an Assisted Regeneration Strategy for Lean‐Burn Methane Combustion

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