The Kinetics of the Esterification of Free Fatty Acids in Waste Cooking Oil Using Fe2(SO4)3/C Catalyst

甘孟瑜; 潘登; 马利; 岳恩; 洪建兵

doi:10.1016/S1004-9541(09)60037-9

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The Kinetics of the Esterification of Free Fatty Acids in Waste Cooking Oil Using Fe₂(SO₄)₃/C Catalyst

Updated：2026-01-06

- The Kinetics of the Esterification of Free Fatty Acids in Waste Cooking Oil Using Fe₂(SO₄)₃/C Catalyst
- Chinese Journal of Chemical Engineering Vol. 17, Issue 1, Pages: 83-87(2009)
- Affiliations：
  
  College of Chemistry & Chemical Engineering, Chongqing University,Chongqing,China,400044
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(09)60037-9
  CLC：
- Published：2009
- Accepted：
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(SO DOI： 10.1016/S1004-9541(09)60037-9.

摘要

The esterification of free fatty acids(FFA) in waste cooking oil with methanol in the presence of Fe

(SO

)

/C(ferric sulfate/active carbon) catalyst was studied.The effects of different temperature

methanol/FFA mole ratio and amount of catalyst on the conversion of FFA were investigated.The results demonstrated that under optimal esterification conditions the final acid value of the resultant system can be reduced to ～1(mg KOH)·g

-1

which met fu

lly the requirements in post-treatment for efficient separation of glycerin and biodiesel.The kinetics of the esterification were also investigated under different temperatures.The results indicated that the rate-control step could be attributed to the surface reaction and the esterification processes can be well-depicted by the as-calculated kinetic formula in the range of the experimental conditions.

Abstract

The esterification of free fatty acids(FFA) in waste cooking oil with methanol in the presence of Fe

(SO

)

/C(ferric sulfate/active carbon) catalyst was studied.The effects of different temperature

-1

which met fully the requirements in post-treatment for efficient separation of glycerin and biodiesel.The kinetics of the esterification were also investigated under different temperatures.The results indicated that the rate-control step could be attributed to the surface reaction and the esterification processes can be well-depicted by the as-calculated kinetic formula in the range of the experimental conditions.

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