Sita to build plastic-to-diesel conversion plants in UK

London – Recycling company Sita is to build Britain’s first fully operational plants to convert end-of-life plastic into diesel fuel using liquefaction, pyrolysis and distillation technology developed by Cynar.

The company plans to build 10 UK plants dealing with 60,000 tonnes of mixed plastic waste per year and to commission the first plant in London by the end of 2011.

The company then aims to construct two to three plastic-to-diesel conversion plants per year, depending on planning consent.

Each plant will be designed to convert approximately 6,000 tonnes of mixed waste plastic annually, specifically targeting mixed waste plastic diverted from landfill, and to produce in excess of four million litres of diesel fuel.

The Cynar system consists of a stock infeed system, pyrolysis chambers, contactors, distillation, centrifuge, oil recovery line, off-gas cleaning and residual contamination removal.

In use, waste plastics are loaded via a hot-melt infeed system directly into a main pyrolysis chamber. Agitation commences to even the temperature and homogenise the feedstocks. Pyrolysis then commences and the plastic becomes a vapour. Non-plastic materials fall to the bottom of the chamber.