Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (11): 2769-2775.doi: 10.3866/PKU.WHXB201607262

• ARTICLE • Previous Articles     Next Articles

Effect of the Calcination Temperature of the Support on the Performance of Rh-Mn-Li/SBA-15 Catalysts for CO Hydrogenation

Fei XUE1,3,Ji-Min HE4,Wei-Miao CHEN1,Xian-Gen SONG1,Xian-Bo CHENG1,Yun-Jie DING1,2,*()   

  1. 1 Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning Province, P. R. China
    2 State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning Province, P. R. China
    3 University of Chinese Academy of Sciences, Beijing 100049, P. R. China
    4 Zhejiang Shuren University, Hangzhou 310015, P. R. China
  • Received:2016-05-26 Published:2016-11-08
  • Contact: Yun-Jie DING E-mail:dyj@dicp.ac.cn
  • Supported by:
    the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA070500);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB17020400)

Abstract:

Rh, Mn and Li were supported on SBA-15 samples that had been calcined at 550, 700, 800, and 900℃, using an incipient co-impregnation technique. The catalytic performances of these materials were subsequently evaluated for the hydrogenation of carbon monoxide. The catalysts were characterized by means of N2 adsorption-desorption, X-ray diffraction, transmission electron microscopy, H2 chemisorption, and Fourier transform infrared spectroscopy. The structure of the SBA-15 support remained unchanged even after its calcination at 900℃. However, the specific surface area, pore size, and total pore volume of SBA-15 decreased from 842.6 m2·g-1, 9.57 nm, and 1.18 cm3·g-1 to 246.4 m2·g-1, 5.62 nm, and 0.34 cm3·g-1, respectively, when the calcination temperature increased from 550 to 900℃. In addition, the Rh particle size increased in the range of 1.5-4.0 nm with increasing calcination temperature. Furthermore, the Rh particles showed a greater tendency towards the mesopores of support when they were calcined at high temperatures, which could be attributed to the reduced number of micropores. These changes therefore made it easier for H2 and CO to interact with the Rh particles immobilized on the supports calcined at high temperatures. High levels of activity and selectivity towards C2+ oxygenates were therefore obtained on the Rh-Mn-Li/SBA-15 prepared using the SBA-15 calcined at 900℃.

Key words: Rhodium, Syngas, COhydrogenation, C2+ oxygenates, Calcination temperature, SBA-15

MSC2000: 

  • O643