Intensification of biodiesel production using dual-frequency counter-current pulsed ultrasound

Xiulian Yin; Xuejuan Zhang; Miaomiao Wan; Xiuli Duan; Qinghong You; Jinfeng Zhang; Songlin Li

doi:10.1016/j.ultsonch.2016.12.036

Intensification of biodiesel production using dual-frequency counter-current pulsed ultrasound

Ultrason Sonochem. 2017 Jul:37:136-143. doi: 10.1016/j.ultsonch.2016.12.036. Epub 2016 Dec 30.

Authors

Xiulian Yin¹, Xuejuan Zhang², Miaomiao Wan², Xiuli Duan², Qinghong You³, Jinfeng Zhang², Songlin Li²

Affiliations

¹ Huaiyin Insttute of Technology, School of Life Science and Food Engineering, Huaian, Jiangsu 223003, China; Jiangsu Key Lab of Biomass-based Green Fuels and Chemicals, Nanjin Forestry University, Nanjing, Jiangu 210037, China; Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration, Huaiyin Institute of Technology; Huaian 223003, China.
² Huaiyin Insttute of Technology, School of Life Science and Food Engineering, Huaian, Jiangsu 223003, China.
³ Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration, Huaiyin Institute of Technology; Huaian 223003, China; Key Laboratory of Medicinal Exploitation and Utilization of Regional Resources, Huaiyin Institute of Technology, Huaian, Jiangsu 223003, China; Jiangsu Provincial Key Laboratory of Palygorskite Science and Applied Technology, Huaiyin Institute of Technology, Huaian 223003, China. Electronic address: youqhong@163.com.

PMID: 28427616
DOI: 10.1016/j.ultsonch.2016.12.036

Abstract

Biodiesel production from soybean oil deodorizer distillate intensified by dual-frequency counter-current pulsed ultrasound and the kinetics were studied. Results indicated that the biodiesel conversions enhanced by single-frequency were lower than those enhanced by dual-frequency. For dual-frequency, the biodiesel conversion of SMM was higher than those of SQM. The biodiesel conversion of the combination of 20/28kHz is the highest. The effects of 20/28kHz SMM on biodiesel production were studied and optimal conditions were: methanol to triglyceride molar ratio 8:1, catalyst content 1.8%, the water content in feedstock should be less than 0.4%, the acid value of feedstock should be less than 2mgKOH·g^-1, the biodiesel conversion could reach 96.3%. The kinetics of SMM and SSPU were studied and results showed that the transesterification reaction was pseudo-second order and the energy activation obtained by SMM and SSPU were 18.122kJ·mol^-1 and 26.034kJ·mol^-1, respectively. These results showed that transesterification reaction intensified by SMM is easier to take place than SSPU.

Keywords: Biodiesel; Dual-frequency counter-current pulsed ultrasound; Kinetic; Soybean oil deodorizer distillate.