Uncatalyzed Oxidation of Cyclohexane in the Microchannels
The oxidation of cyclohexane in the microchannels not only improves the safety of the reaction,but also the performance of the oxidation reaction.Different gas-liquid micro mixers were used for the mixing of gas and liquid before entering into microchannels,and SIMM-V2 performed best of all.Excellent slug/plug flow can be formed in the microchannels after mixing in the gas-liquid micro mixer when the molar ratio of oxygen to cyclohexane is less than 0.5:1.The conversion of cyclohexane increased as the residence time increased,but the selectivity of cyclohexanol and cyclohexanone increased first and then decreased.At the reaction temperature of 200 ℃,with the flow rate of the solvent isopropanol being 1 mL/min and the molar ratio of oxygen to cyclohexane being 0.15:1,both the conversion of cyclohexane and selectivity of cyclohexanol and cyclohexanone increased with the increase of pressure.The conversion of cyclohexane and selectivity of cyclohexanol and cyclohexanone reached 10.10% and 66.93% respectively at the pressure of 8 MPa.It is indicated that the new process by use of uncatalyzed cyclohexane oxidation in the microchannels will have very attractive prospects in the improvement of the safety,intensification of the gas-liquid mass transfer and obtaining good reactive performance.Therefore,the technology shows good potential in industrial applications.
Microchannel Cyclohexane Oxidation
L.Wang M.Zhu J.Lu H.Hu
Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027,China State Key Laboratory of Industrial Control Technology, Zhejiang University, Hangzhou 310027,China
国际会议
中国微米纳米技术学会第14届学术年会、第3届国际年会暨第6届微米纳米技术“创新与产业化国际研讨与展览会(CSMNT2012 & ICMAN2012)
杭州
英文
1-6
2012-11-04（万方平台首次上网日期，不代表论文的发表时间）