Study on Maximizing Catalytic Performance of cobalt (II) 5,10,15,20-tetrakis(4-pyridyl)porphyrin for cyclohexane oxidation

Publication date: Available online 23 April 2019Source: Journal of Industrial and Engineering ChemistryAuthor(s): Xian-Fei Huang, Guang-Ping Yuan, Guan Huang, Su-Juan WeiAbstractAiming at the most enhancing the catalytic performance of simple and cheap cobalt (II) 5,10,15,20-tetrakis(4-pyridyl)porphyrin (Co TPyP), guided by the nowadays-advanced various technologies, Co TPyP was anchored onto nanoporous bar with thiol-functionalized silica (npb-SiO2-SH). The resulting npb-SiO2-S-Co TPyP catalyst was characterized using various techniques, determining its structure. The total surface area ratios (TSAR) of the immobilized cobalt porphyrin to the npb-SiO2-SH, and the catalytic cyclohexane oxidation reaction conditions were at the same time optimized via Response Surface Methodology (RSM). Compared with those obtained from traditional optimizing method (TOM), on average, RSM could enhance as high as more than 60% catalyst turnover frequency (TOF) and yields of cyclohexanone and cyclohexanol (KA oil). The anchored 0.05 mg Co TPyP could catalyze the oxidation of 200 mL of cyclohexane, under not using any solvents and additives, offering 2.5×106 1/h of TOF, and 19% of yields. The npb-SiO2-S(20%-0.0438)-Co TPyP catalyst showed better reusability, excellent catalyticGraphical AbstractThe structure of npb-SiO2-S-Co TPyP catalyst, and its catalytic reaction conditions for cyclohexane oxidation were optimized via Response Surface Methodology, the catalytic activity and KA oil yields wer...
Source: Journal of Industrial and Engineering Chemistry - Category: Chemistry Source Type: research