Pyrolysis is the destructive distillation of organic material through the application of intense, indirect heat in the absence of oxygen. <br />http://www.ecoreps.com.au/aboutpyrolysis.html <br /> <br />Pyrolysis can be used to convert chemicals such as ethylene dichloride to polyvinyl chloride (PVC). Biomass or waste can be converted into other useful products such as syngas using pyrolysis.