Abstract
Waste-based feedstocks and bioenergy intermediate carriers are key issues of the whole bioenergy value chain. Towards a circular economy, changing upcycling infra-structure systems takes time, while energy-from-waste (EfW) technologies like waste pyrolysis and gasification could play an integral part. Thus, the aim of this study is to propose a circular economy pathway for the waste to energy (WtE) thermochemical technologies, through which solid biomass waste can be slowly pyrolyzed to biochar (main product), in various regionally distributed small plants, and the pyro-oils, by-products of those plants could be used as an intermediate energy carrier to fuel a central gasification plant for syngas production. Through the performed review, the main parameters of the whole process chain, from waste to syngas, were discussed. The study develops a conceptual model that can be implemented for overcoming barriers to the broad deployment of WtE solutions. The proposed model of WtE facilities is changing the recycling economy into a circular economy, where nothing is wasted, while a carbon-negative energy carrier can be achieved. The downstream side of the process (cleaning of syngas) and the economic feasibility of the dual such system need optimization.
Highlights
The bioenergy production technologies that focus on the utilization of organic and recyclable sources are of great importance regarding the mitigation of climate crisis and the gradual reduction of human dependence on fossil fuels
Waste to energy (WtE) technologies could play a crucial role in the energy transition, leading to an increased share of the bioenergy consumed in the EU
This study proposes a circular economy conceptual approach to produce syngas via bio-oil gasification
Summary
The bioenergy production technologies that focus on the utilization of organic and recyclable sources are of great importance regarding the mitigation of climate crisis and the gradual reduction of human dependence on fossil fuels. In this direction, biomass plays an incredibly promising role, because it is found abundantly, and because its utilization does not result in increased CO2 emissions, and it can significantly decrease SO2 and NOx emissions. In particular, are well suited to exploiting waste and residual streams These enhanced bioenergy carriers have the potential to considerably help the energy transition, but they require further research for commercial introduction [3]
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