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Effect of turbulence in micro‐reactors on ultrafast competitive reactions in Cu‐Zn co‐precipitation
Author(s) -
Jiang Xin,
Chen Shuaishuai,
Chen Xinchao,
Ling Chen,
Lu Jiangang
Publication year - 2021
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.17240
Subject(s) - turbulence , precipitation , mixing (physics) , intensity (physics) , copper , catalysis , turbulence kinetic energy , flow (mathematics) , chemistry , materials science , analytical chemistry (journal) , chemical engineering , mechanics , optics , physics , metallurgy , meteorology , chromatography , biochemistry , quantum mechanics , engineering
The enhancement of turbulence was considered to be able to bring about better mixing and more uniform distribution of concentration generally, but its influence on ultrafast competitive reactions is an open question. Cu‐Zn co‐precipitation was carried out in three types of micro‐reactors and the turbulent intensity was regulated by changing flow rate and ultrasound power, respectively. Energy‐dispersive spectrometer of precipitates and characteristic aging time indicate the best uniformity of Cu‐Zn distribution in precipitates appears at moderate turbulent intensity. The numerical simulation shows the uniformities of precipitation both in time and in space are impacted by mixing simultaneously but with opposite direction, resulting in the appearance of maximum. The unevenness of Cu‐Zn distribution caused by inconsistent reaction rates along the time will be erased during subsequent structural evolution, while that caused by diverse reaction rates at various positions can survive and further affect the structure and performance of catalysts.