Systematic procedure and framework for synthesis and evaluation of bioethanol production processes from lignocellulosic biomass

• Published in: Bioresource technology reports 2018-12, Vol.4, p.29-39
• Main Authors: da Silva, André Rodrigues Gurgel, Errico, Massimiliano, Rong, Ben-Guang
• Format: Article
• Language: English
• Subjects: Bioethanol; Lignocellulosic biomass; Process integration; Process synthesis; Systematic procedure
• ISSN: 2589-014X; 2589-014X
• DOI: 10.1016/j.biteb.2018.08.015

Bioethanol from lignocellulosic feedstock rises as a promising alternative to replace liquid fossil fuels in the energy market for the next years. However, the variety of available biomass combined with the necessity of possible pretreatments and their particular features make it difficult to clearly identify the favorable process routes. In this study a systematic approach consisting of seven steps was proposed to obtain possible and feasible alternatives for the conversion of lignocellulosic biomass into bioethanol. The method was exemplified with the aid of a general case study, from the biomass selection to possible by-products generation. The case study resulted in a corn stover based process to produce bioethanol through ammonia fiber explosion pretreatment. Following the systematic approach different alternatives were proposed to finally obtain the optimal flowsheet with a minimum ethanol selling price of 0.43$/kg of ethanol, 35.4% lower than the initial process. •A seven-step systematic procedure for lignocellulosic bioethanol process synthesis•The systematic approach was applied in a study case with corn stover as feedstock.•New alternatives were evaluated for technique, economy and environment.•Production process with AFEX pretreatment was obtained and optimized.•Process improvements following the guidelines achieved savings of 35.4% in the MESP.