Details

Autor(en) / Beteiligte

• Baral, Nawa Raj
• Shah, Ajay

Titel

Comparative techno-economic analysis of steam explosion, dilute sulfuric acid, ammonia fiber explosion and biological pretreatments of corn stover

Ist Teil von

• Bioresource technology, 2017-05, Vol.232 (C), p.331-343

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• •Techno-economics of four different pretreatment processes were compared.•Biological pretreatment required 2 fold more feedstock than sulfuric acid.•Ammonia fiber explosion required 4 fold more external energy than sulfuric acid.•Biological pretreatment required 5 fold less external energy than sulfuric acid.•Sulfuric acid and steam explosion were cost competitive pretreatment methods. Pretreatment is required to destroy recalcitrant structure of lignocelluloses and then transform into fermentable sugars. This study assessed techno-economics of steam explosion, dilute sulfuric acid, ammonia fiber explosion and biological pretreatments, and identified bottlenecks and operational targets for process improvement. Techno-economic models of these pretreatment processes for a cellulosic biorefinery of 113.5 million liters butanol per year excluding fermentation and wastewater treatment sections were developed using a modelling software-SuperPro Designer. Experimental data of the selected pretreatment processes based on corn stover were gathered from recent publications, and used for this analysis. Estimated sugar production costs ($/kg) via steam explosion, dilute sulfuric acid, ammonia fiber explosion and biological methods were 0.43, 0.42, 0.65 and 1.41, respectively. The results suggest steam explosion and sulfuric acid pretreatment methods might be good alternatives at present state of technology and other pretreatment methods require research and development efforts to be competitive with these pretreatment methods.