Catalytic Perf ormance o f Ni-Co/A l۲O۳-Mg O-ZrO۲ N anocataly st toward CO۲ Reforming of CH۴: Effect of ZrO۲ Precursor

The m ain catalyst for CO۲ reforming o f CH۴ is N i-based catalyst. How ever, their major drawback, high a mount of c oke formation, leads t o rapid de activation [ ۱-۲]. In ord er to evalua te the effect of zirconia precursor in the catalytic properties and activity, Ni(۱۰ wt%)-Co(۵w t%)/Al۲O۳-MgO-ZrO۲ nanocatalys t with two different zirconia precursor, zirconyl nitrate hydrate (Z NH) and zir conyl nitrate solution (ZNS) was syn thesized by sol-gel method.Mate rials and m ethods:Al-tri-sec-butoxide, zirconyl nitrate solution and Mg(NO۳)۲.۶H۲ O were emp loyed as su pport precursors. Ni(N O۳)۳.۶H۲O a nd Co(NO ۳)۳.۶H۲O w ere used as active phase and promoter precursors, respe ctively. Isop ropanol and acetyl ac etone were used as sol vent and gelling agent, respectivel y [۳].The nanocatalysts were characterized by XRD, FESEM, BET and FTIR analysis and tested in U-shaped fixed-b ed quartz reactor, stoichiometric fe ed ratio and ۵۵۰-۸۵۰ºC. In this paper the nanocatalyst synth esized using ZNH is ca lled NCZNH, and the o ther sample which employed ZNS is called NC ZNS.

کلیدواژه ها:

Ni-Co /Al۲O۳-Mg O-ZrO۲ ، Sol-Gel ، CO۲ Reforming ، Syngas ، Nano catalyst.