Continuous Production of Biodiesel from Soybean Oil Using Supercritical Methanol in a Vertical Tubular Reactor:I.Phase Holdup and Distribution of Intermediate Product along the Axial Direction

周诚; 王存文; 王为国; 吴元欣; 喻发全; 池汝安; 张俊峰

doi:10.1016/S1004-9541(10)60266-2

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Continuous Production of Biodiesel from Soybean Oil Using Supercritical Methanol in a Vertical Tubular Reactor:I.Phase Holdup and Distribution of Intermediate Product along the Axial Direction

Updated：2026-01-06

- Continuous Production of Biodiesel from Soybean Oil Using Supercritical Methanol in a Vertical Tubular Reactor:I.Phase Holdup and Distribution of Intermediate Product along the Axial Direction
- Chinese Journal of Chemical Engineering Vol. 18, Issue 4, Pages: 626-629(2010)
- Affiliations：
  
  Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology,Wuhan,China,430073
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(10)60266-2
  CLC：
- Published：2010
- Accepted：
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ZHOU Cheng, WANG Cunwen, WANG Weiguo, WU Yuanxin, YU Faquan, CHI Ru'an, ZHANG Junfeng. Continuous Production of Biodiesel from Soybean Oil Using Supercritical Methanol in a Vertical Tubular Reactor:I.Phase Holdup and Distribution of Intermediate Product along the Axial Direction[J]. , 2010, 18(4): 626-629.
DOI：

ZHOU Cheng, WANG Cunwen, WANG Weiguo, WU Yuanxin, YU Faquan, CHI Ru'an, ZHANG Junfeng. Continuous Production of Biodiesel from Soybean Oil Using Supercritical Methanol in a Vertical Tubular Reactor:I.Phase Holdup and Distribution of Intermediate Product along the Axial Direction[J]. , 2010, 18(4): 626-629. DOI： 10.1016/S1004-9541(10)60266-2.

摘要

Abstract

Production of biodiesel with supercritical methanol is a green synthesis process. A study was carried out in a vertical tubular reactor with a length of 3700 mm and a diameter of 20 mm at 275-375℃

15 MPa

and molar ratio of methanol to soybean oil of 40:1.The phase holdup

intermediate product

yield and axial distribution of methyl ester (ME) were investigated.Methanol and oil were mixed non-uniformly due to the formation of biodiesel and difference in their densities

even when the reaction system was in the supercritical state.From top to bottom

the phase holdup of methanol increased and that of oil decreased.As temperature increased

the concentrations of monoglyceride and diglyceride decreased gradually and the ME yield increased.When the temperature reached 300℃

the critical temperature of the system

the ME yield was 50%.Further increase in temperature led to a sharp in-crease of ME yield.However

at 375℃ after 1200 s of reaction time

the decomposition rate of ME was greater than its formation rate

reducing the ME yield.

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