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Published on: June 15, 2014
Torrefaction of organic municipal solid waste to high calorific value solid fuel using batch reactor with helical
Kabir Abogunde Abdulyekeen1, Wan Mohd Ashri Wan Daud2, Muhamad Fazly Abdul Patah2
1Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia; Department of Chemical Engineering, Faculty of Engineering & Engineering Technology, Abubakar Tafawa Balewa University, Bauchi P.M.B 0248, Nigeria.
Abstract:
The potential of producing high calorific value (CV) solid fuel was investigated in a helical screw rotation-induced (HSRI) fluidized bed reactor based on mechanical fluidization. The study revealed that the HSRI torrefaction improved the torrefied product properties. For the 40 and 0 rpm conditions, the CV, fixed carbon, and ash contents of torrefied solid fuel increased with an increase in temperature. In contrast, volatile matter, moisture content, mass and energy yields decreased. The CV of torrefied solid fuel increased by a factor of 1.43 and 1.58 at 280 °C for the 40 and 0 rpm conditions, respectively. HSRI torrefaction enhanced the removal of hydroxyl functional group. HSRI torrefaction improved the hydrophobicity of the torrefied solid fuel. Therefore, the HSRI fluidized bed reactor promotes uniform temperature distribution, a higher heat transfer rate within the sample particles in the reactor, and a homogenous torrefied solid product compared to the fixed bed reactor.
