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Azis

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  • 1. Harnessing Bioenergy from Lignin Muhammad Mufti Azis CSS Chalmers University of Technology, Gothenburg, Sweden STUDENT SUMMIT FOR SUSTAINABILITY (WSC-SD), UNIVERSITY OF REGINA, SASKATCHEWAN, CANADA MAY 2008
  • 2. Outline of presentation
    • Introduction
    • Motivation
    • Lignoboost process
    • Environmental and Socio-economic Gain
    • Remarks
  • 3. What is Lignin?
    • The most complex polymer in polymer in wood. Its main functions are:
      • It gives stiffness to the cell wall
      • It glues different cells together
      • It makes the cell wall hydrophobic
      • Protection against microbial degradation
      • (Ljungberg Textbook)
  • 4. Lignin in nature
    • Taken from: Kirk and Othmer
  • 5. Environmental and Socioeconomic Impact From: Kvaerner pulping for non-commercial use KRAFT Process
  • 6. Motivation
    • The original idea was to enhance capacity of pulp mill without huge investment on recovery boiler.
    • Theoretically, It is possible to achieve energy surplus in pulp mill
    • If lignin is extracted from black liquor, it opens up possibility to export energy from
    • pulp mill
  • 7. PULP MILL LignoBoost Taken from: www.lignoboost.com
  • 8. Lignoboost Process From: Öhman et.al. 2007
  • 9. Lignin
  • 10. Energy Supply in Sweden (2006) From: Swedish Energy Agency 192 201 116 113 Total: 624 TWh
  • 11. Environmental and Socio-economic
    • According to reference mill, It is possible to
    • achieve CO2 emission -260 Kg CO2 / ADt due to potential to generate energy from black liquor and bark.
    • Incineration of lignin mixed with coal paste shows promising result
    • With lignin price 15 €/MWh, it is more profitable than upgrading recovery boiler capacity in order to increase mill capacity
    • Government supports development of renewable energy by issuing green certificate and imposing tax on fossil fuel
  • 12. Remarks “ Lignin extraction is a first step to “by-pass” mother nature slow way of producing fuel and chemicals based on hydrocarbons.” (Prof. Hans Theliander)
  • 13.