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A Kinetic Study on the Catalytic Reductive Methylation of Acetylhydrazine
Author(s) -
Ghanbari Pakdehi S.,
Abolhamd G.,
Sohrabi M.,
Saberi Moghaddam A.,
Zarei A.
Publication year - 2005
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200500030
Subject(s) - chemistry , catalysis , hydrazine (antidepressant) , hydrogen , limiting , activation energy , kinetics , palladium , kinetic energy , bar (unit) , slurry , inorganic chemistry , rate determining step , catalytic hydrogenation , methylation , organic chemistry , chromatography , thermodynamics , mechanical engineering , physics , quantum mechanics , meteorology , engineering , biochemistry , gene
Catalytic reductive methylation of acetylhydrazine (AH) to dimethyl acetylhydrazine (DMAH) is a key step in the production of unsymmetrical dimethyl hydrazine (UDMH). The results of the present study show that the limiting step in this process is the hydrogenation of AH to mono methyl acetylhydrazine (MMAH). The kinetics of the hydrogenation of acetylhydrazone (AOH) using an activated carbon catalyst impregnated with 5 % palladium were studied in a stirred slurry reactor at 40–65 °C and 5–25 bar hydrogen pressure. Analysis of the data from this investigation indicates that the rate of hydrogenation is consistent with an Eley‐Rideal reaction mechanism. The activation energy for the hydrogenation was determined as 44 kJ/mol.