CuO//La_2O_3/γ-Al_2O_3合成2-甲基吡嗪的催化性能  

Catalytic properties of CuO//La_2O_3/γ-Al_2O_3 for synthesis of 2-methylpyrazine

作　　者：蒋雪[1] 李斌[1] 张飞跃[1] 李景林[1] 范闽光[1] 黄晗名[1] 彭福长[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2012年第3期477-482,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(21063001);广西自然科学基金资助项目(2010GXNSFA013041)

摘　　要：用改进的柠檬酸络合法制备了CuO//La2O3/γ-Al2O3催化剂,并通过XRD、NH3-TPD技术对样品进行了表征,探索其对乙二胺(ED)和1,2-丙二醇(PG)为原料合成2-甲基吡嗪(2-MP)反应的催化活性。分别考察了催化剂不同金属配比、煅烧温度以及反应温度、气体空速等对催化剂活性的影响。结果表明:当铜铝摩尔比为4∶6,煅烧温度为700℃时催化剂的催化性能最好;在原料液中1,2-丙二醇、乙二胺和水的摩尔比为1∶1∶2、反应温度为320℃、气体空速(GHSV)1 815 h-1的条件下,1,2-丙二醇的转化率为100%,2-甲基吡嗪的收率为82.7%。CuO//La2O3/γ-A12O3 oxides were prepared by an improved amorphous citric precursor （IACP） and characterized by X-ray diffraction （XRD）, temperature programmed desorption of am- monia （NH3-TPD） and temperature programmed reduction （TPR） techniques. The performance tests were carried out upon the synthesis of 2-methylpyrazine （2-MP） from ethylenediamine （ED） and 1, 2-propylene glycol （PG）. The influences of different metal mole ratio, calcinating tempera- ture of the catalyst and reaction temperature, gas hourly space velocity （GHSV） on the catalytic ac- tivity were studied. The results demonstrated that the performance of the CuO//La2O3/γ-A12O3 cat- alyst with n （ Cu）： n （Al） =4：6 at the ealcinating temperature of 700 ℃ was the best. When the reaction temperature was 320 ℃, using a feed of ED, PG, and water （ED： PG： H2O molar ratio was 1： 1： 2） and the space velocity at 1 815 h^-1, the selectivity of 2-MP reached 82.7% while the con- version of PG was enhanced to 100%.

关 键 词：CuO//La2O3/γ-Al2O3催化剂 催化 2-甲基吡嗪 乙二胺 1 2-丙二醇 

分 类 号：O643[理学—物理化学]