Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (1): 166-172.doi: 10.3866/PKU.WHXB201411241

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Influence of Cu on the K-LaZrO2 Catalyst for Isobutanol Synthesis

WU Ying-Quan1,2, WANG Si-Chen3, XIE Hong-Juan1, GAO Jun-Wen3, TIAN Shao-Peng1,2, HAN Yi-Zhuo1, TAN Yi-Sheng1   

  1. 1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China;
    2. University of the Chinese Academy of Sciences, Beijing 100049, P. R. China;
    3. Shaanxi Yanchang Petroleum Group Corp. Ltd., Xi'an 710075, P. R. China
  • Received:2014-10-01 Revised:2014-11-21 Published:2014-12-25
  • Contact: TAN Yi-Sheng E-mail:tan@sxicc.ac.cn
  • Supported by:

    The project was supported by the Prospective Project of Institute of Coal Chemistry, Chinese Academy of Sciences (2011SQZBJ13) and Cooperative Project of Shaanxi Yanchang Petroleum(Group) Corp. Ltd., China (JT1014SKF0003).

PDF

1301

Like

Abstract:

The K-LaZrO2 and K-CuLaZrO2 catalysts used for the synthesis of isobutanol fromsyngas have been characterized by X-ray diffraction (XRD), temperature programmed desorption (TPD), X-ray photoelectron spectrometry (XPS), Fourier transforminfrared (FTIR) spectroscopy, and chemical enrichment methods. The results of these analyses indicated that a solid solution of Cu-Zr was formed after the addition of Cu, and that the CuO was well dispersed. Furthermore, the addition of Cu inhibited the formation of t-ZrO2. CO-TPD showed that the addition of Cu led to an increase in the amount of COadsorbed by the catalyst. Furthermore, H2-TPD showed that the addition of Cu led to an increase in the amount of H2 adsorbed at lowtemperatures, which was related to the activity of catalyst. The results of FTIR and chemical enrichment analyses also revealed that the level of CO adsorption increased following the addition of Cu, as well as amount of C1 intermediates. Taken together, these results indicated that the activity of catalyst was significantly enhanced by the addition of Cu and that the selectivity towards isobutanol increased up to 48.5% when the reaction was conducted at p=10.0 MPa, gas hourly space velocity (GHSV) = 3000 h-1, T=360℃, and V(H2)/V(CO)=1:1.

Key words: CuO, ZrO2-based catalyst, Syngas, Isobutanol