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Cu–Al Spinel Oxide as an Efficient Catalyst for Methanol Steam Reforming
Author(s) -
Xi Hongjuan,
Hou Xiaoning,
Liu Yajie,
Qing Shaojun,
Gao Zhixian
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201405213
Subject(s) - spinel , sintering , catalysis , calcination , methanol , steam reforming , copper , oxide , chemical engineering , materials science , copper oxide , phase (matter) , inorganic chemistry , metallurgy , chemistry , hydrogen production , organic chemistry , engineering
Cu–Al spinel oxide, which contains a small portion of the CuO phase, has been successfully used in methanol steam reforming (MSR) without prereduction. The omission of prereduction not only avoids the copper sintering prior to the catalytic reaction, but also slows down the copper‐sintering rate in MSR. During this process, the CuO phase can initiate MSR at a lower temperature, and CuAl 2 O 4 releases active copper gradually. The catalyst CA2.5‐900, calcined at 900 °C with n (Al)/ n (Cu)=2.5, has a higher CuAl 2 O 4 content, higher BET surface area, and smaller CuAl 2 O 4 crystal size. Its activity first increases and then decreases during MSR. Furthermore, both fresh and regenerated CA2.5‐900 showed better catalytic performance than the commercial Cu–Zn–Al catalyst.