Abstract:

The efects of some additives and their dosages on the autothermal reforming of methane to produce hy-drogen were investigated using a fixed—bed mieroreaetor.Th e additives include rare e l metals such as La and Ce and transitional metals such as Zr and Cu．The results show that(1)the addition of Ce or Zr greatly improves the catalytic performance of Ni catalyst;(2)the catalytic performance of the catalyst promoted by both Ce and Zr in
diferent mass ratio is obviously diferent from that ofthe catalyst promoted only by Ce or Zr;(3)as compared with Ni/Zr₂₀Al₈₀O_δand Ni/Ce₃₀Al₇₀O_δ catalysts,Ni/Zr₁₀ Ce₂₀ Al₇₀ O_δ results in all improved H₂ yield;and(4)when Cu is added in Ni/Zr₁₀ Ce₂₀ Al₇₀ O_δ ,the new—formed catalyst Ni/Cu₃ Zr₁₀Ce₂₀Al₆₇O_δis of the best catalytic performance,th a CH₄ conversion of 100% ,a H₂,yield of 72.9% and a H₂ selectivity of 100% at 750℃ .

Key words: methane, autothermal reforming, hydrogen production, catalyst, rare eanh metal, transitional metal