摘要
采用等体积浸渍法制备了3％MoO3-x％Re2O7，／y-A12O3（负载量均为质量分数，下同）双金属催化剂（z=0～1），以混合丁烯[n（1-丁烯）／n（2．丁烯）=3]为原料，在固定床反应器上考察了不同Re含量对Re—Mo双金属催化剂在丁烯自歧化反应中的催化性能，并采用XRD、NH3-TPD、H2-TPR和N2物理吸附对催化剂进行了表征。结果表明，与3％MoO，／T．A12O3催化剂相比，双金属催化剂增加了催化剂的酸量，抑制了在反应初期的“诱导期”，提高了催化剂在丁烯自歧化反应中的活性和稳定性。在80oC、1．0MPa、混合丁烯WHSV=1．2h“的条件下，3％MoO，-1％Re2O7，／A12O3，催化剂（Re207负载量1％，M003负载量3％）上丁烯自歧化反应在70h内可维持60％以上的丁烯转化率和约25％的丙烯收率。
Abstract ：3% MoO3-x% ReaO7/T-A1203 bimetallic catalysts（ x = 0 - 1 ） were prepared via conventional incipient-wetness impregnation method. Mixed butene self-metathesis reactions over these catalysts were investigated in a fixed-bed reactor,where mixed butene [ n （1-butene）/n （2-butene） = 3 ] was chosen as reactant. The catalysts were characterized by means of XRD, NH3-TPD, n2-TPR and N2-adsorption. The results indicate that, compared to 3% MoO3/T-A1203 catalyst, molybdenum-rhenium bimetallic catalyst increased the acid amount, inhibited the induction period in the initial stage of the reaction, and enhanced the activity and stability of catalysts in mixed butene self-metathesis reaction. Under the reaction conditions of 80 ℃, 1.0 MPa, WHSV = 1.2 h-1,3 % MoO3-1% Re20T/T-A1203 catalyst gave butene conversion of above 60% ,and propene yield remained at about 25% during 70 h on stream.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2013年第11期1229-1233,共5页
Fine Chemicals
基金
中国石油天然气股份有限公司基金项目~~
关键词
丁烯
丙烯
自歧化
钼-铼双金属催化剂
铼
催化与分离提纯技术
butene
propene
self-metathesis
molybdenum-rhenium bimetallic catalyst
rhenium
catalysis, separation and purification technology
