Co-Gasification of Treated Solid Recovered Fuel Residue by Using Minerals Bed and Biomass Waste Blends

Md Tanvir Alam,Hang Seok Choi,Yong-Chil Seo,Se-Won Park,Yean-Ouk Jeong,Sang-Yeop Lee,Anthony De Girolamo

doi:10.3390/en13082081

Md Tanvir Alam, Hang Seok Choi + Show 5 more

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https://doi.org/10.3390/en13082081

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Journal: Energies	Publication Date: Apr 21, 2020
Citations: 10	License type: CC BY 4.0

Affiliation: Yonsei University, Monash University

Abstract

Solid recovered fuel (SRF) residue, which is leftovers from the SRF manufacturing process, usually is discarded in landfill because of its low heating value and high ash and moisture content. However, it could be used as a fuel after mechanical and biological treatment. Gasification experiments were conducted on treated SRF residue (TSRFR) to assess the viability of syngas production. Efforts were also made to improve the gasification performance by adding low-cost natural minerals such as dolomite and lime as bed material, and by blending with biomass waste. In the case of additive mineral tests, dolomite showed better performance compared to lime, and in the case of biomass blends, a 25 wt% pine sawdust blend with TSRFR showed the best performance. Finally, as an appropriate condition, a combined experiment was conducted at an equivalence ratio (ER) of 0.2 using a 25 wt% pine sawdust blend with TSRFR as a feedstock and dolomite as the bed material. The highest dry gas yield (1.81 Nm3/kg), with the highest amount of syngas (56.72 vol%) and highest lower heating value (9.55 MJ/Nm3) was obtained in this condition. Furthermore, the highest cold gas efficiency (48.64%) and carbon conversion rate (98.87%), and the lowest residue yield (11.56%), tar (0.95 g/Nm3), and gas pollutants content was observed.

Highlights

Energy plays a vital role in our modern life
The gradual increase of CO2 with increasing equivalence ratio (ER) resembles the prevalence of oxidation reaction (C + O2 → CO2 ), whereas the gradual decrease of CO with increasing ER shows the deficiency of water-gas reaction (C + H2 O → 2CO + H2 ) or the reverse Boudouard reaction (C + CO2 → 2CO) [32]
We found that at 950 ◦ C temperature, ER 0.2 is the optimum condition for treated SRF residue (TSRFR) gasification

Summary

Introduction

Energy plays a vital role in our modern life. An accessible and secured supply of energy has become imperative for the sustainable growth of society [1]. To meet its energy demand, the world is heavily dependent on fossil fuel at present [2]. Representatives of fossil fuels like oil, gas, and coal are currently meeting nearly 80% of the world’s energy demand [3]. The reckless use of fossil fuels has evoked many problems in the world, such as global warming, fossil fuel reserve depletion, and other environmental concerns [4]. To lessen the reliance on fossil fuels, to assure the pathway of energy production, and to branch out the use of new and renewable fuels, energy production from waste is inevitable [5]

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