Ultrasound promoted catalytic liquid-phase dehydrogenation of isopropanol for Isopropanol-Acetone-Hydrogen chemical heat pump

Min Xu; Fang Xin; Xunfeng Li; Xiulan Huai; Hui Liu

doi:10.1016/j.ultsonch.2014.09.003

Ultrasound promoted catalytic liquid-phase dehydrogenation of isopropanol for Isopropanol-Acetone-Hydrogen chemical heat pump

Ultrason Sonochem. 2015 Mar:23:66-74. doi: 10.1016/j.ultsonch.2014.09.003. Epub 2014 Sep 11.

Authors

Min Xu¹, Fang Xin², Xunfeng Li³, Xiulan Huai³, Hui Liu⁴

Affiliations

¹ Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: xumin@iet.cn.
² Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China.
³ Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China.
⁴ State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.

PMID: 25246094
DOI: 10.1016/j.ultsonch.2014.09.003

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.

Keywords: Chemical heat pump; Isopropanol dehydrogenation; Mathematical modeling; Power density; Ultrasound.

Publication types

Research Support, Non-U.S. Gov't