title: Ultrasound promoted catalytic liquid-phase dehydrogenation of isopropanol for Isopropanol-Acetone-Hydrogen chemical heat pump.
abstract: The apparent kinetic of the ultrasound assisted liquid-phase dehydrogenation of isopropanol over Raney nickel catalyst was determined in the temperature range of 346-353 K. Comparison of the effects of ultrasound and mechanical agitation on the isopropanol dehydrogenation was investigated. The ultrasound assisted dehydrogenation rate was significantly improved when relatively high power density was used. Moreover, the Isopropanol-Acetone-Hydrogen chemical heat pump (IAH-CHP) with ultrasound irradiation, in which the endothermic reaction is exposure to ultrasound, was proposed. A mathematical model was established to evaluate its energy performance in term of the coefficient of performance (COP) and the exergy efficiency, into which the apparent kinetic obtained in this work was incorporated. The operating performances between IAH-CHP with ultrasound and mechanical agitation were compared. The results indicated that the superiority of the IAH-CHP system with ultrasound was present even if more than 50% of the power of the ultrasound equipment was lost.
authors.affiliation: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: xumin@iet.cn.
authors.forename: Min
authors.initials: M
authors.lastname: Xu
authors.affiliation: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Fang
authors.initials: F
authors.lastname: Xin
authors.affiliation: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Xunfeng
authors.initials: X
authors.lastname: Li
authors.affiliation: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Xiulan
authors.initials: X
authors.lastname: Huai
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
keywords: Chemical heat pump; Isopropanol dehydrogenation; Mathematical modeling; Power density; Ultrasound