Title:
Techno-Economics of Dry and Wet Torrefaction Process for Improved Bio-Feedstocks for Biorefinery Applications
Author(s):
Kempegowda, R.S., Khalil, R., Skreiberg, Ø.
Document(s):
Paper
Slide presentation
Abstract:
This article deals with the techno-economic analysis of wet and dry torrefaction processes for producing high quality feedstocks. This article also compares the impact of wet and dry torrefaction processes on biomass to liquid fuel (BTL) production under Norwegian conditions. The study goal is to produce transportation fuel via Fischer-Tropsch synthesis with combined heat and power (CHP) as a co-product. The biorefinery is fed by 150 MW (LHV basis) of biomass as woodchips. The biorefinery design is based on high temperature entrained flow gasification followed by catalytic Fischer-Tropsch synthesis. Process modelling software (Aspen Plus) is utilized to determine the mass and energy streams. Economic analysis is performed by a custom built spreadsheet model to estimate the capital investment and operating costs. Cost of biofuel preprepration is evaluated by a 20 year discount cash flow analysis, developed to estimate the fuel production cost. All costs are adjusted to 2014 level. The study also evaluate the scale dependency of implementing a BTL plant in the range of 150 to 600 MW of biomass input. Operating cost components such as biomass, maintenance, labour and chemicals for scrubbing CO2 are major contributors.
Keywords:
gasification, wet torrefaction, Fischer-Tropsch, dry torrefaction, techno-economics
Topic:
Biomass Conversion Technologies for Intermediates, Liquid and Gaseous Fuels, Chemicals and Materials
Subtopic:
Production of advanced solid biofuels
Event:
22nd European Biomass Conference and Exhibition
Session:
3DO.5.1
Pages:
969 - 979
ISBN:
978-88-89407-52-3
Paper DOI:
10.5071/22ndEUBCE2014-3DO.5.1
Price:
FREE
