Catalytic surface development of novel nickel plate catalyst with combined thermally annealed platinum and alumina coatings for steam methane reforming

Catalytically active surface of small nickel (min 99 wt%) plates for steam methane reforming was enhanced by successive temperature programmed oxidation−reduction (TPO−TPR) pretreatment and combined physical vapor deposition of Pt and Al2O3. The effect of annealing time, temperature, order and numbe...

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Vydáno v:International journal of hydrogen energy Ročník 38; číslo 3; s. 1419 - 1429
Hlavní autoři: Obradović, Ana, Likozar, Blaž, Levec, Janez
Médium: Journal Article
Jazyk:angličtina
Vydáno: Kidlington Elsevier Ltd 06.02.2013
Elsevier
Témata:
Activity
Aluminum oxide
Applied sciences
Catalysis
Catalysts: preparations and properties
Chemistry
Energy
Exact sciences and technology
Fuels
Gas industry
General and physical chemistry
Ni/Pt/Al2O3
Physical vapor deposition
Spillover
Steam methane reforming
Structured plate catalyst
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Physical vapor deposition
Activity
Spillover
Ni/Pt/Al2O3
Structured plate catalyst
Steam methane reforming
Methane
Aluminium oxide
Coated material
O
Platinum
Ni/Pt/Al
Nickel
Steam reforming
Catalyst activity
Catalyst
ISSN:0360-3199, 1879-3487
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Popis
Shrnutí:Catalytically active surface of small nickel (min 99 wt%) plates for steam methane reforming was enhanced by successive temperature programmed oxidation−reduction (TPO−TPR) pretreatment and combined physical vapor deposition of Pt and Al2O3. The effect of annealing time, temperature, order and number of coatings on the catalytic activity was investigated by means of a pulse technique at the reaction temperature of 760 °C. The most active and stable surface phases resulted after the successively deposited layers of Pt, Al2O3, and Pt had been annealed for 12 h onto 2-cycle TPO−TPR pretreated nickel plate at the temperature of 700 °C in a circulating atmosphere of N2. The durability performance of the so-prepared surface phases on a specifically structured plate catalyst element (diameter 43 mm and length 42 mm) was tested in a tubular reactor for some 70 h in temperature range 500−650 °C. Deactivation was mainly caused by carbon surface deposition. Structured nickel (Ni) plate catalyst for steam methane reforming (SMR) with enhanced activity by platinum (Pt) and alumina (Al2O3) coating. [Display omitted] ► Catalytic enhancement of structured Ni-plate reforming catalyst was investigated. ► Oxidation–reduction process and deposition of Pt and Al2O3 were done on Ni plates. ► Catalytic activity of enhanced Ni-plate samples was tested by pulse technique. ► Structured Ni-plate catalyst was examined in continuous differential reactor. ► Catalyst deactivation at conditions chosen was caused mainly by carbon deposition.
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ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2012.11.015