Preliminary techno-economic evaluation of 2G ethanol production with co-products from rice straw
- PDF / 4,502,421 Bytes
- 14 Pages / 595.276 x 790.866 pts Page_size
- 13 Downloads / 196 Views
ORIGINAL ARTICLE
Preliminary techno-economic evaluation of 2G ethanol production with co-products from rice straw Panneerselvam Ranganathan 1 Received: 21 September 2020 / Revised: 12 October 2020 / Accepted: 6 November 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract A preliminary techno-economic analysis of 100 KLPD capacity of the second-generation (2G) ethanol with co-products from rice straw through conceptual process design is studied. Various pathways are investigated in this work. They are as follows: scenario 1 (baseline): separate enzymatic hydrolysis and hemicellulose (C5) and cellulose (C6) fermentation; scenario 2: separate hydrolysis and fermentation of C6 sugars and C5 sugar-to-furfural; scenario 3: separate hydrolysis and C5 and C6 sugar cofermentation; scenario 4: C6 and C5 fermentation separately and hydrothermal liquefaction of lignin to produce biochemical; scenario 5: C6 fermentation, C5 to furfural and lignin to biochemical. The material and energy balances of all the pathways are performed using a steady-state simulation. Based on the results of mass and energy flows of the process, the economic analysis is performed using a discounted cash flow method. It is found that the minimum selling price of ethanol for the baseline scenario is 0.627$/litre whereas other scenarios (2–5) show 0.5, 0.563, 0.35 and 0.25 US$/litre, respectively. The lowest minimum selling price of bioethanol for the last scenario is due to the production of furfural from xylose and various bio-chemicals from lignin along with bioethanol production. Finally, a sensitivity analysis is performed to identify key parameters that influence the economics of the process. Keywords 2G ethanol . Rice straw . Techno-economic analysis
1 Introduction The generation of liquid fuels from biomass, such as bioethanol, biodiesel and biocrude, is one option to reduce the use of fossil fuels such as diesel and gasoline. Among them, bioethanol can be treated as one of the leading and most popular biofuel, which can be blended with gasoline. Currently, many countries around the world have been implementing bioethanol blending policy, especially country like India has committed towards implementation of E20 by 2030 [1]. Commercially, the bioethanol is produced from the fermentation of sugarcane molasses which is one of the firstgeneration bioethanol feedstock but it cannot fulfil the demand of ethanol for blending targets due to the limited molasses availability and demand by industrial/potable sectors poses. Therefore, the lignocellulosic biomass may be explored
* Panneerselvam Ranganathan [email protected] 1
Department of Chemical Engineering, National Institute of Technology Calicut, Kozhikode 673601, India
for the second-generation biofuel as a feedstock to meet not only food security but also, reducing fossil fuel import and a significant reduction in GHG emissions. Lignocellulosic biomass is mainly composed of plant cell walls, with the structural carbohydrates of cellulose and hemicellulose, and hetero
Data Loading...
