Study on the relation between conversion reaction yield and final products’ viscosity in methanolysis from various feedstocks
Abstract
This paper presents a new method to quickly calculate the performance of methyl ester synthesis process without using GC-MS and the traditional equation. Many feedstocks were converted to methyl esters including soybean oil, coconut oil, rapeseed oil, microalgae oil, beef tallow, catfish oil and deodoriser distillate from vegetable oil refinery. The reactions were established on the same solid super acid catalyst system SO4 2-/ZrO2 [1]. All the reagents were kept in an autoclave supported stirring system under the same conditions such as temperature of 130oC under autogenous pressure, methanol/feedstock volume ratio of 2/1, and catalyst dosage of 5%. The performance tests were established continuously by withdrawing product samples after many reaction times, for examples after 5, 10, 20, 30, and 40, etc. minutes. Using the results derived from GC-MS to calculate the reaction yield, we reached a range of performance values. Then, the methyl ester yield - viscosity relations were described on diagram to estimate their linear limitations. Applying these relations on any methanolysis process with the same feedstock, we could quickly and precisely determine the reaction yield without using GC-MS and the traditional calculations.
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