摘要
实验考察了Cr2O3、MoO3、WO3三种单组分氧化物催化剂,以及四种不同催化载体对SO2直接催化还原的影响,结果表明它们的活性相差很大,WO3的活性最差,MoO3的活性最高;具有酸碱双功能的γ Al2O3载体是催化脱硫的最佳载体.此外,制备了三种双组分金属氧化物负载催化剂,其催化脱硫活性顺序是:Mo Co/γ Al2O3>Mo Fe/γ Al2O3>Mo Ni/γ Al2O3;Mo Co双组分催化比单组分MoO3具有优越性,在250～400℃范围内,SO2脱除率达90%以上,不仅催化脱硫活性比较高,而且催化剂不易失活.
A series of metal oxide catalysts (Cr2O3, MoO3, WO3) supported on SiO2, MgO, γAl2O3 and 5Azeolite are prepared. The results show that the effect of the active metal oxides and carries on catalytic activity for flue gas desulfurization is very sensitive. WO3 catalyst has the least activity, MoO3 catalyst has the best activity, and γAl2O3 is the best support for catalytic desulfurization. Moreover, three kinds of bimetallic oxide supported catalysts are also prepared. The order of activity of catalytic desulfurization is as follows: MoCo/γAl2O3 > MoFe/γAl2O3> MoNi/γAl2O3. This bimetallic novel MoCo/γAl2O3 catalyst is better than monometallic one MoO3. For flue gas catalytic desulfurization at 250-400 ℃; It's removal ratio of SO2 exceeds 90%,and besides the better desulfurization activity it can keep it's catalytic activity for longer time.
出处
《复旦学报（自然科学版）》
CAS
CSCD
北大核心
2003年第3期435-437,共3页
Journal of Fudan University：Natural Science
基金
广州市环保示范基金资助项目(B2302617)
关键词
催化脱硫
二氧化硫
催化还原
氧化钼催化剂
catalytic desulfurization
sulfur dioxide
catalytic reduction
MoO_3 catalyst
