Comparative Assessment of Steam Processed pellets produced from wood, straw and switchgrass S M HASSAN SHAHRUKH, ADETOYESE OYEDUN, AMIT KUMAR 1 , LINOJ KUMAR, BAHMAN GHIASI, SHAHAB SOKHANSANJ 2 1 Department of Mechanical Engineering, University of Alberta Edmonton, AB, Canada 2 Department of Chemical and Biological Engineering, Vancouver, BC, Canada ADVANCED BIOFUELS SYMPOSIUM July 22 - 24, 2015, Montreal, Canada
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Comparative Assessment of Steam Processed pellets produced from wood, straw and switchgrass
S M HASSAN SHAHRUKH, ADETOYESE OYEDUN, AMIT KUMAR1, LINOJ KUMAR, BAHMAN GHIASI, SHAHAB
SOKHANSANJ2
1Department of Mechanical Engineering, University of AlbertaEdmonton, AB, Canada
2Department of Chemical and Biological Engineering, Vancouver, BC, Canada
ADVANCED BIOFUELS SYMPOSIUM July 22 - 24, 2015, Montreal, Canada
Presentation Outline Background and Objective Pellet Production Supply Chain Model Development and Validation Mass and Heat Balance of Steam
Pretreatment Techno-Economic Result Summary of Result
Presentation at BFN, 22-24 July, 2015
Background
Presentation at BFN, 22-24 July, 2015
• Pretreatment helps producing high quality pellets
• Energy density of regular pellets is 1/8th of coal
• High transportation cost of regular biomass and pellets
• Need for higher utilization of Biomass
Low Utilization Cost Issues
Pretreatment
Low Bulk and Energy density of
regular pellets
Objectives
Conduct Techno-Economic Assessment
Cost curves Sensitivity & uncertainty
Conduct Energy Analysis Net energy ratio (NER)
Sensitivity & uncertainty
Develop process model for steam pretreatment of wood, straw and switchgrassHeat and mass
balanceData intensive
modeling
Presentation at BFN, 22-24 July, 2015
Pellet Supply Chain
Biomass collectio
n
Bale formatio
n/ chipping
Transportation to
pellet plant
Pellet producti
on
Transportation of
pellet to biorefinery
Used in biorefinery
Supply chain of pellet to a biorefinery (Conventional method)
Used in biorefinery
Biomass
collection
Transportation to
pellet plant
Pellet Producti
on
Transportation of
pellet to biorefinery
Steam pretreatm
ent
Bale formation/chip
ping
Steam Pretreatm
ent
Supply chain of pellet (produced from pretreated biomass) to a biorefinery
Presentation at BFN, 22-24 July, 2015
Experimental Material and Method
Material
Wood, Straw ,Switchgrass
Moisture content ~ 10%-50%
Method
Pretreatment carried in 2.6L StakeTech
Steam gun with 400g of biomass treated at different temperature
and time
Steam treated biomass pelletized
Presentation at BFN, 22-24 July, 2015
Model Input and Validation
1. Boiler unit: Supply of steam at different time and