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Continuous and complete conversion of high concentration p ‐nitrophenol in a flow‐through membrane reactor
Author(s) -
Miao Jianfeng,
Lu Jia,
Jiang Hong,
Liu Yefei,
Xing Weihong,
Ke Xuebin,
Chen Rizhi
Publication year - 2019
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.16692
Subject(s) - membrane , nanorod , membrane reactor , catalysis , chemical engineering , ceramic membrane , molar ratio , nitrophenol , materials science , ceramic , nanoparticle , volumetric flow rate , chemistry , nuclear chemistry , nanotechnology , composite material , organic chemistry , biochemistry , physics , quantum mechanics , engineering
Here, we report on a green and effective method for the continuous and complete conversion of high concentrations of p ‐nitrophenol (PNP) using a flow‐through membrane reactor and less NaBH 4 . The catalytic membrane was successfully fabricated by loading Pd nanoparticles onto the surface of a branched TiO 2 nanorod‐functionalized ceramic membrane. The modification with branched TiO 2 nanorods can significantly improve the loading amount of Pd nanoparticles onto ceramic membranes, resulting in enhanced catalytic performance. With 6 mg of Pd, 93 L m −2 hr −1 of flux density and 8.04 cm 2 of membrane surface area in the flow‐through membrane reactor, PNP at a concentration of 4,000 ppm can be converted to high‐value p ‐aminophenol using less NaBH 4 (using a molar ratio of NaBH 4 :PNP of 9.6) within 24 s at 30°C. More importantly, the conversion can be continuously and stably performed for 240 min.