首页|Biodiesel production through non-conventional supercritical routes: Economic evaluation
Biodiesel production through non-conventional supercritical routes: Economic evaluation
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NSTL
Supercritical biodiesel production has the potential to process cheaper raw materials and reduce separation costs. It did not proved to be competitive with the traditional homogeneous alkaline process so far because of the associated higher capital and energy costs. However, the literature provides enough knowledge about three non-conventional supercritical technologies that have not yet been studied for industrial application: inter-esterification with methyl acetate (Route 1); reaction with acetic acid and esterification with methanol (Route 2); and reaction with dimethyl carbonate (Route 3). They have the additional advantage of not generating low profitable glycerol, replacing it by other more valuable by-products: triacetin and glycerol dicarbonate. This article presents the economic assessment of these three routes in an industrial scale, showing that Routes 1 and 3 are economically feasible as long as 58-89% of triacetin and 26-28% of glycerol dicarbonate can be sold, respectively. It makes Route 3 the most attractive route, requiring 34% less capital for the same (1% lower) production cost as Route 1 in the best scenarios. Route 2 requires still more development to become feasible regardless of the market, as the byproduct revenues do not compensate its 68% higher capital cost and 21% higher production cost (compared to the best scenario of Route 3).
NSTL
