Comparative studies on catalytic and non-catalytic co-gasification of rubber seed shell and high density polyethylene mixtures

Comparative studies on catalytic and non-catalytic co-gasification of rubber seed shell and high density polyethylene mixtures

Journal Reference

Journal of Cleaner Production, Volume 70, 1 May 2014, Pages 303–314.

Bridgid Lai Fui China, Suzana Yusup, Ahmed Al Shoaibib, Pravin Kannanb, Chandrasekar Srinivasakannanb, Shaharin Anwar Sulaimanc

a Biomass Processing Lab, Centre for Biofuel and Biochemical Research, Green Technology MOR, Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Tronoh 31750, Malaysia and

b Department of Chemical Engineering, The Petroleum Institute, P.O. Box 2533, Abu Dhabi, United Arab Emirates and

c Department of Mechanical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Tronoh 31750, Malaysia.

 

Abstract

 

The thermal degradation behavior of rubber seed shell, high density polyethylene waste, and the binary mixtures of high density polyethylene and rubber seed shell (0.2:0.8 weight ratio) are compared in pyrolysis, gasification, and catalytic gasification process at different heating rate of 10, 20, 30 and 50 K min−1 in temperature range of 323–1173 K using thermogravimetric analysis equipment. It is observed that there are one, two, and three stages of decomposition occurring in high density polyethylene, rubber seed shell, and the binary mixtures respectively regardless of the process involved. The activation energies, EAand pre-exponential factor, A are generated using one step integral method based on first order rate of reaction. Besides that, the synergistic effect on the binary mixtures is also investigated for the three different processes involved. It is found that the EA and A values for the binary mixtures are lower than the pure high density polyethylene but comparable to pure rubber seed shell regardless of the processes involved. In addition, it is also observed that the EA and A values are slightly lower when catalyst is added in the binary mixtures compared to the absence of catalyst in the gasification process.

 

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