Politecnico di Torino - Corso Duca degli Abruzzi, 24 - 10129 Torino, ITALY

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Energy recoveryFast Pyrolysislow temperaturesrenewable energy


Fast pyrolytic process, at low temperature and with low environmental impact. It hinders the production of dioxin and reduces the ecological and energy limits that characterize current industrial solutions and the relative difficulties of application, with plant solutions adapted to the specific case that allow to recover energy and use renewable energy. This is the reason why many public waste management and waste water purification bodies that have, respectively, organic fraction and sludge to be disposed of are interested in the applications of this process. The invention comprises the following original steps: i) low temperature pyrolytic treatment of a flow of micronized material; ii) controlled molecular reforming of the syngas flux obtained from pyrolyzed material, by applying recovery (MW) and renewable (UV) energy.

Technical features

In the pyrolytic treatment phase at low temperature of the flow of micronized material, a mixture of syngas and superheated steam, coming from the heating / reforming phase, is used to achieve rapid pyrolysis. The reforming phase of the syngas takes place by means of photocatalysis. This generates an increase in the kinetics of the process also because the UV energy, which affects the binding energy, is supplemented by energy supplied by microwaves which acts on the kinetic energy of the molecules: the reforming processes in the heating zone also allow to obtain an increase in the hydrogen fraction in the syngas. In addition, the renewable or recovery heat sources used in the reforming step of the pyrolyzed syngas stream include energy from UV and / or microwave (MW) rays. Pyrolysis takes place in a reactor divided into: an inlet section, in which a low-temperature pyrolytic treatment of a flow of micronized material takes place, and a heating section; in the latter, superheated steam acts mainly, which increases the water content in the gaseous phase and raises the overall temperature of the system (by applying renewable or recovery heat sources), and a controlled reforming of the pyrolyzed syngas flow takes place.

Possible Applications

  • Anaerobic digestion, pyrolysis and gasification plants;
  • Public waste management and waste water purification bodies which have, respectively, organic fraction and sludge to be disposed.


  • Fast pyrolytic process at low temperatures;
  • Wide applicability: wet waste fraction; purifying sludge; waste from the food industry; wood; organic materials or wastes with a lower calorific value of more than 3000 kcal/kg in the dry state;
  • No risk of air pollution from dioxins.