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4388817 
Journal Article 
Kinetic study of hydrogen peroxide decomposition at high temperatures and concentrations in two capillary microreactors 
Shang, M; Noel, T; Su, Y; Hessel, V 
2017 
Yes 
AIChE Journal
ISSN: 0001-1541
EISSN: 1547-5905 
American Institute of Chemical Engineers. AIChE Journal 
63 
2 
689-697 
WOS:000392844900020 
On the background of the direct adipic acid synthesis from cyclohexene and H2O2, a kinetic model was derived for the H2O2 decomposition catalyzed by sodium tungstate at high H2O2 concentrations and high temperatures. A perfluoroalkoxy (PFA) and a stainless steel micro-flow capillary match commonly used microreactor materials. In the PFA capillary, the decomposition of hydrogen peroxide increased with residence time, reaction temperature and catalyst loading. The reaction order with respect to hydrogen peroxide and sodium tungstate was zero and one, respectively. Simulated data fit well with experimental data in the PFA capillary. While showing a similar trend as that in the PFA capillary, the stainless steel capillary exhibited much higher reaction rates. The steel surface participated in the decomposition process as a heterogeneous catalyst. Key influencing factors of the H2O2 decomposition provided some clues on the reaction mechanism of the adipic acid synthesis and its process optimization. (c) 2016 American Institute of Chemical Engineers AIChE J, 63: 689-697, 2017 
H2O2 decomposition; adipic acid; kinetics; process safety; microreactor