期刊
ENERGY
卷 240, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2021.122784
关键词
Biodiesel; Catalytic absorption; Catalytic distillation; Esterification; Solid acid-catalyzed
资金
- National Council for Scientific and Technological Development - CNPq
- Agency for the Financing of Studies and Projects - FINEP
- Brazilian Federal Agency for Support and Evaluation of Graduate Education - Capes [001]
- FACEPE/NUQAAPE [APQ-0346-1.06/14]
- Natural Sciences and Engineering Research Council of Canada - NSERC
Three solid acid-catalyzed processes for biodiesel production were designed and optimized, with processes A and B found to be the most economically and environmentally friendly options. Process A, with a simpler flowsheet, was identified as the best choice compared to process B.
Three solid acid-catalyzed (SAC) processes for biodiesel production from residual oil and fats (ROFs) with HWSi/Al2O3 as catalyst were designed and optimized using Aspen Plus: simultaneous esterification, transesterification, and methanol separation based on catalytic distillation (CD) (process A) and catalytic absorption (CA) (process B), where CA has not yet been investigated in these conditions; and hydroesterification industrial process using CD (process C1). For the first time, processes A, B and C based on SAC route were optimized and compared regarding to techno-economic and environmental aspects. Processes A and B were the most economically and eco-friendly options. Compared to process B, process A was the best option due to simpler flowsheet. Process A2 presented 25.6, 60.1, 4.6, 8.6, 52.6 and 62.8% lower capital, utilities (C-util), operation, total annualized (TAC), waste treatment (C-waste) and CO2 emission costs than process C1. A global optimization developed for process A saved 430 k$/year on TAC. After a heat integration, process B presented 4.9 and 10.8% lower C-util and C-waste than process A. Process A was also designed for FFA levels of 5-25 wt%, where the biodiesel break-even price remained competitive (0.48-0.75 $/kg) with diesel price. (C) 2021 Elsevier Ltd. All rights reserved.
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