To research the structural characteristics of 3A molecular sieve and Al2O3 mixed carrier catalyst and the catalytic characteristics of catalyst for toluene

a series of nickel-based catalysts were prepared by equal volume impregnation

and γ-Al2O3 and 3A molecular sieve were mixed as carriers. The catalysts were characterized using XRD

H2-TPR and BET

and the catalytic performance of nickel catalyst for toluene was investigated in a fixed-bed reactor. The results indicated that the active species Ni mainly exists as NiO and Ni3Fe iron-nickel alloy in the catalysts. The specific surface area and pore volume of catalysts went down for the Al2O3 catalysts

and then the toluene conversion rose with the increase of temperature

while the conversion rate of toluene increased firstly and then decreased as the load amount of Fe increased. For the mixing catalysts

the specific surface area and pore volume of catalysts increased

while the activity of catalysts and the conversion of toluene increased firstly and then decreased with the increase of γ-Al2O3 proportion. It has the highest toluene conversion rate

when the reaction temperature is at 700 ℃

the water/carbon ratio is 2

and the residence time is 0.6 s

at same time the mixing ratio of γ-Al2O3 is 60%.