催化学报 ›› 2016, Vol. 37 ›› Issue (11): 1982-1990.DOI: 10.1016/S1872-2067(16)62531-7

• 论文 • 上一篇    下一篇

Pb促进的Pd/γ-Al2O3催化剂上H2O2氧化甘油反应

María L. Faroppaa, Juan J. Muscia, María E. Chiossoa.b, Claudia G. Caggianoa, Hernán P. Bideberripeb,c, José L. García Fierrod, Guillermo J. Sirib,c, Mónica L. Casellaa,b   

  1. a 布宜诺斯艾利斯西北国立大学, CIBA(CIT UNNOBA, CONICET), 布宜诺斯艾利斯, 阿根廷;
    b 拉普拉塔国立大学科学学院, CINDECA(CCT La Plata-CONICET, UNLP), 1900 拉普拉, 阿根廷;
    c 拉普拉塔国立大学工程学院PIDCAT, 1900拉普拉, 阿根廷;
    d 西班牙国家研究委员会(CSIC)催化与石油化学研究所, E-28049 马德里, 西班牙
  • 收稿日期:2016-06-01 修回日期:2016-08-20 出版日期:2016-11-25 发布日期:2016-11-25
  • 通讯作者: Mónica L. Casella,Tel:+542214210711; E-mail:casella@quimica.unlp.edu.ar

Oxidation of glycerol with H2O2 on Pb-promoted Pd/γ-Al2O3 catalysts

María L. Faroppaa, Juan J. Muscia, María E. Chiossoa.b, Claudia G. Caggianoa, Hernán P. Bideberripeb,c, José L. García Fierrod, Guillermo J. Sirib,c, Mónica L. Casellaa,b   

  1. a CIBA (CIT UNNOBA, CONICET), Universidad Nacional del Noroeste de la Provincia de Buenos Aires, Newbery 261 (6000) Junín, Provincia de Buenos Aires, Argentina;
    b CINDECA (CCT La Plata-CONICET, UNLP), Universidad Nacional de La Plata, Facultad de Ciencias Exactas, 47 N·257, 1900 La Plata, Argentina;
    c PIDCAT Facultad de Ingeniería, Universidad Nacional de La Plata, 1 y 47, 1900 La Plata, Argentina;
    d Instituto de Catálisis y Petroleoquímica, CSIC, Canto Blanco, E-28049 Madrid, España
  • Received:2016-06-01 Revised:2016-08-20 Online:2016-11-25 Published:2016-11-25
  • Contact: Mónica L. Casella,Tel:+542214210711; E-mail:casella@quimica.unlp.edu.ar
  • Supported by:

    This work was supported by CONICET (PIP 0276), UNLP (Projects X 700), UNNOBA (SIB 2924/14), and Ministry of Education and Sports (Call "Jorge Sábato" Project 44-144-415), Argentina.

摘要:

制备了Pd含量为1 wt%、不同Pb/Pd摩尔比的γ-Al2O3负载Pd-Pb双金属催化剂,并用于常压、45℃和pH=11条件下H2O2氧化甘油反应中.催化剂的形貌和分散度采用扫描电镜-X射线电子散射谱和透射电镜进行了表征;双金属催化剂中合金相用X射线光电子能谱进行了验证.单金属Pd催化剂上反应结束后甘油转化率为19%,但随着Pb的加入甘油转化率增大到约100%.所制四个不同Pb/Pd原子比的双金属催化剂PdPb0.25,PdPb0.50,PdPb1.00和PdPb1.60均可氧化甘油至二羟基丙酮(DIHA),反应结束后DIHA选择性分别可达59%,58%,34%和25%.

关键词: 钯, 双金属钯-铅催化剂, 过氧化氢, 甘油氧化, 甘油酸, 羟基乙酸

Abstract:

A series of bimetallic Pd-Pb catalysts with a constant Pd content of 1 wt% and Pb/Pd atomic ratio from 0 to 1.6 supported on γ-Al2O3 were prepared and used for glycerol oxidation with H2O2 as the oxidizing agent at atmospheric pressure, 45℃ and pH=11. The morphology and dispersion of the catalysts were characterized by scanning electron microscopy-energy dispersive X-ray spectrosco-py (SEM-EDX) and transmission electron microscopy (TEM). The presence of an alloy phase in the bimetallic catalyst was detected by X-ray photoelectron spectroscopy (XPS). Glycerol conversion obtained with the monometallic Pd catalyst was 19%, which was increased to 100% with the addi-tion of Pb. The four bimetallic PdPb catalysts were able to oxidize glycerol to dihydroxyacetone (DIHA) and the selectivity to DIHA reached 59%, 58%, 34% and 25% for PdPb0.25, PdPb0.50, PdPb1.00 and PdPb1.60 catalysts, respectively.

Key words: Palladium, Bimetallic palladium-lead catalyst, Hydrogen peroxide, Glycerol oxidation, Glyceric acid, Glycolic acid