Pd含量对SO_4^(2-)/ZrO_2-WO_3固体超强酸催化剂其异构化性能的影响  

Effect of Pd content on the catalytic performance of SO_4^(2-)/ZrO_2-WO_3 solid superacid in pentane isomerization

作　　者：宋华[1,2] 宋华林[3] 崔雪涵[1] 张旭[1] 

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318 [2]东北石油大学石油与天然气化工省重点实验室,黑龙江大庆163318 [3]牡丹江医学院黑龙江省高校肿瘤疾病防治重点实验室,黑龙江牡丹江157011

出　　处：《燃料化学学报》2012年第11期1346-1352,共7页Journal of Fuel Chemistry and Technology

基　　金：中国石油天然气股份有限公司科技风险创新基金(07-06D-01-04-03-02)

摘　　要：制备了Pd-SO24-/ZrO2-WO3型固体超强酸催化剂,并采用XRD、FT-IR、TPR、XPS、BET和TG-DTA等表征手段对催化剂进行了表征。以正戊烷异构化为探针反应,考察了Pd含量对催化剂异构化活性的影响。结果表明,Pd可以明显地降低催化剂的还原温度,提高催化剂中SO24-的分解温度,从而提高了催化剂热稳定性。当Pd质量分数为0.05%时,Pd-SO24-/ZrO2-WO3固体超强酸催化剂的催化活性最好。该催化剂在反应温度260℃、反应压力2.0 MPa、质量空速为1.0 h-1、氢油比为4.0时,异戊烷收率和液收率为40.1%和93.9%。Pd-SO2/ZrO2-WO3 solid superacid catalysts were prepared and characterized by XRD, FT-IR, TPR, XPS, BET and TG-DTA; the effect of Pd content on its catalytic performance in n-pentane isomerization was investigated. The results showed that Pd can reduce the reduction temperature, increase the decomposition temperature of SO42- and therefore improve the thermostability of the Pd-SO42-/ZrO2-WO3 catalysts. Pd-SO2-/ ZrO2-WO3 with a Pd mass fraction of 0.05% exhibits the highest catalytic activity for isomerization; over it under 260 ℃, 2.0 MPa, mass hourly space velocity of 1.0 h-1 , and H2/n-pentane molar ration of 4.0, the conversion of n-pentane and the yield of liquid products are 40.1% and 93.9%, respectively.

关 键 词：固体超强酸 催化剂 ZrO2-WO3 钯 正戊烷 异构化 

分 类 号：TQ426.99[化学工程]