Hydrogen and syngas production by methane dry reforming on SBA-15 supported nickel catalysts: On the effect of promotion by Ce0.75Zr0.25O2 mixed oxide

Albarazi, Abdulkader; Beaunier, Patricia; Costa, Patrick Da

doi:10.1016/j.ijhydene.2012.10.063

Cited by 114 publications

(87 citation statements)

References 51 publications

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“…In this work, the carbon dioxide conversion was calculated according to the formula reported by several researchers; Albarazi et al, Asencios et al and Oyama et al [23][24][25]. The properties of the carbonaceous coke deposited on the reacted catalysts were determined by temperature-programmed oxidation (TPO) experiments.…”

Section: Gas Analysismentioning

confidence: 99%

Influence of process conditions on syngas production from the thermal processing of waste high density polyethylene

Saad

Nahil

Williams

2015

Journal of Analytical and Applied Pyrolysis

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A range of process conditions, including the type of reactor, the reacting atmosphere and the presence of catalyst, and their influence on the production of syngas i.e. hydrogen and carbon monoxide, from the thermal processing of waste high density polyethylene (HDPE) has been investigated. Pyrolysis in the presence of nitrogen and in the presence of carbon dioxide, two-stage pyrolysis-steam reforming and carbon dioxide/catalysis process conditions were investigated in relation to gas composition and particularly hydrogen and carbon monoxide yield. The influence of addition of a Ni-Mg-Al catalyst in the second reactor was also investigated. It was found that a two-stage pyrolysis at 500 °C, followed by second stage reaction at 800 °C resulted in a significant increase in hydrogen production. With the addition of carbon dioxide, the two stage process also increased carbon monoxide yield in addition to hydrogen. Addition of steam into the second stage reactor with the carbon dioxide produced a further increase in hydrogen production. Also, the presence of a Ni-Mg-Al catalyst in the second reactor increased the amount of hydrogen and carbon monoxide produced.

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Section: Gas Analysismentioning

confidence: 99%

Influence of process conditions on syngas production from the thermal processing of waste high density polyethylene

Saad

Nahil

Williams

2015

Journal of Analytical and Applied Pyrolysis

View full text Add to dashboard Cite

show abstract

“…Both conversions increased with temperature, reflecting the endothermic character of the dry reforming reaction. However, the CH 4 conversion was always slightly higher than that of CO 2 , over the entire temperature range, suggesting some (although limited) decomposition of methane into hydrogen and carbon (CH 4 → 2H 2 + C) as side reaction [6,18].…”

Section: Catalytic Activitymentioning

confidence: 98%

“…A suggested solution to inhibit carbon deposition is to promote the catalyst with a metal oxide, especially CeO 2 . The latter is characterized by redox properties (Ce 4+ ↔ Ce 3+ ) that promote oxygen vacancies formation, thus enhancing the mobility of surface oxygen whose presence contributes in lowering carbon deposition on the metallic particles [4][5][6][7]. It was also reported that both metal dispersion and metal-support interaction are improved in presence of CeO 2 [5,7].…”

Section: Introductionmentioning

confidence: 99%

“…Mesoporous SBA-15 materials in particular have distinct properties (high specific surface area, uniform narrow pore size distribution, confinement effect…) known to favor metal dispersion and limit particles sintering, with consequently interesting performances in DRM [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the Ce/Si atomic ratio had to be kept below 0.04 to avoid pore blocking. In another work focused on the promotion of Ni-based SBA-15 catalysts with Ceria-Zirconia mixed oxides (CZ) [6], formation of clustered layers of CZ and NiO phases occurred, which also led to partial or complete blockage of the pores.…”

Section: Introductionmentioning

confidence: 99%

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