S M Hassan Shahrukh, Dr. Amit Kumar
2014 ASABE and CSBE Annual International Meeting, 13-16 July ,2014
Development of Process Model for Assessment of Steam Treatment of Biomass for Pellet Production
Presentation at ASABE, 13-16 July,2014
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 Future Work
Presentation at ASABE, 13-16 July,2014
Background
Presentation at ASABE, 13-16 July,2014
Objective
Presentation at ASABE, 13-16 July,2014
Pellet Supply Chain
Presentation at ASABE, 13-16 July,2014
Experimental Material and Method
Presentation at 29th ICSW, March 31, 2014
Model Development
Presentation at ASABE, 13-16 July,2014
Model Input
1. Boiler unit: Supply of steam at different time and temperature
2. Steam Pretreatment Unit: Biomass
is treated with high pressure steam in batch reactor ( Yield reactor
considered)
logR= logනexp(T− 10014.75 )dt Governing Equation:
Source: Lam et al. 2013
Presentation at ASABE, 13-16 July,2014
Simplified Model
Separated unit for steam pretreatment unit and
pelletizer unit since it is not a continuous process in the
experimental set up
Presentation at ASABE, 13-16 July,2014
Model Input 3. Pellet mill: produces pellet of 20-30 mm long , 6 mm in diameter, has
a heating element operating at 70-100 C.
2. Grinder: Kicks Energy constant 100KJ/kg, solid
recovery 95%
1. Dryer : Operating temperature at 80
C. rotary drum dryer flow rate of
10.4 t/h
Presentation at ASABE, 13-16 July,2014
Model Validation
Operation Experimental Energy Required MJ/Kg ASPEN model Energy Required MJ/Kg
Steam treated Untreated Steam treated Untreated
Steam Pretreatment 4.30 0.0 4.35 0.0
Drying 4.52 3.01 4.56 2.98
Size reduction 0.82 1.31 0.88 1.28
Pelletization 0.27 0.24 0.25 0.23
Total Energy Input 9.91 4.56 10.04 4.49
Total Energy Output 21.00 18.00 21.80 18.40
Energy Ratio 2.12 3.95 2.17 4.10
Presentation at ASABE, 13-16 July,2014
Steam Pretreatment representative mass and heat balance
Presentation at ASABE, 13-16 July,2014
Techno-Economic Snapshot
Steam Treated Pellet Untreated Pellet
Capacity (ton) 45000 45000
Total Energy (GJ) 990000 810000
Price of Pellet ($/ton) 231 207
Price of Pellet ($/GJ) 24.6 24.2
Presentation at ASABE, 13-16 July,2014
Cost Curve: Capital cost per ton
Steam Pretreatment increase capital cost due to addition of Steam Boiler
and Steam Pretreatment Unit
Steam Pretreated Pellet Regular pellet
Presentation at ASABE, 13-16 July,2014
Cost Curve: $/ton
No Point of Intersection in $/ton Curve
Presentation at ASABE, 13-16 July,2014
Cost Curve: $/GJ
Point of Intersection occurs at 270000 tons
Presentation at ASABE, 13-16 July,2014
Summary of Result
Presentation at ASABE, 13-16 July,2014
Future Work
Presentation at ASABE, 13-16 July,2014
Reference • Kumar A. (2009) “A conceptual comparison of bioenergy options for
using mountain pine beetle infested wood in western Canada.” Bioresource Technology,100 (1): 387-399.
• Lam, P. S.,Tooyserkani, Z., Naimi, L. J. and Sokhansanj, S. (2013) “Pretreatment and pelletization of woody biomass”, In Pretreatment Techniques for Biofuels and Biorefineries, Green Energy and Technology. Z. Fang, Editor. Springer-Verlag: Berlin Heidelberg, 93-116.
• Sarkar S. and Kumar A. (2009) “Techno-economic assessment of biohydrogen production from forest biomass in Western Canada.” Transactions of the ASABE, 52 (2): 1-12.
• Sultana. A., Kumar, A. and Harfield, D. (2010) “Development of agri-pellet production cost and optimum size”, Bioresource Technology 101: 5609-5621. Online at Science Direct.
Presentation at ASABE, 13-16 July,2014
Acknowledgement Bio Fuel Net
University of Alberta
Dr. Shahab Sokhansanj, Dr. Linoj Kumar and Bahman Ghiasi, Department of Chemical Engineering, University of British Columbia
Presentation at ASABE, 13-16 July,2014
Thank You/Questions
For further information:
Amit KumarNSERC/Cenovus/Alberta Innovates
Industrial Research Chair in Energy and Environmental Systems Engineering &
Cenvous Energy Endowed Chair in Environmental Engineering
E-mail: [email protected] Website: www.energysystems.ualberta.ca
Presentation at ASABE, 13-16 July,2014