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Development of fluidized‐bed catalyst for partial oxidation of n ‐butane
Author(s) -
Wen Xu,
Yang Gong
Publication year - 2003
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690490216
Subject(s) - butane , maleic anhydride , catalysis , selectivity , yield (engineering) , chemistry , space velocity , phase (matter) , partial oxidation , chemical engineering , inorganic chemistry , organic chemistry , materials science , polymer , metallurgy , engineering , copolymer
Optimization experiments were carried out for preparation of a catalyst precursor. Results show that the acid concentration and reaction temperature in precursor preparation exhibit strong effects on the catalyst behavior. For the catalysts prepared at higher concentrations of acid, the quantity of the V 4+ phase (VO) 2 P 2 O 7 is large, and the n‐butane conversions are all quite high. When decreasing the acid concentration in precursor preparation, the relative amount of the V 5+ phase δ‐VOPO 4 and the n‐butane conversion increase continuously; at the same time, the selectivity to maleic anhydride increases at the beginning, and then decreases after reaching a maximum value. The catalyst prepared at an acid concentration of 102.3% gave a maximum yield of maleic anhydride of 48.10% at an inlet n‐butane concentration of 4.0% and a space velocity of 500 h −1 . The fine particle catalyst in this study offers great flexibility of operation.