Pyrolysis: Difference between revisions

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==Overview==

[[Pyrolysis]] is the [[treatment|thermal treatment]] of a material in the absence of oxygen to produce gas ([[Syngas|syngas]]), liquid and solid char fractions. [[Pyrolysis]] generally requires an external heat source to maintain the temperature required and to avoid the introduction of air. There are a range of different types of kiln/reactor used, often aligned to the waste being processed, and include fixed bed reactors, batch or semi-batch reactors, rotary kilns, fluidized bed reactors, microwave assisted reactors and some innovative solutions like plasma or solar reactors <ref> Czajczyńska et al, 2017. Potential of pyrolysis processes in the waste management sector. Thermal Science and Engineering Progress, [online] 3, pp.171-197. </ref>. The [[Syngas|syngas]] produced in the process can be burnt to raise steam and create electricity, but most plants are exploring the option of cleaning the [[Syngas|syngas]] for use in a gas engine or separating the gas into usable fractions such as hydrogen for use, as an example, as liquid fuels. The solid residue (sometimes described as a char) is a combination of non-combustible materials and carbon.

[[Pyrolysis]] is the [[treatment|thermal treatment]] of a material in the absence of oxygen to produce gas ([[Syngas|syngas]]), liquid and solid char fractions. Pyrolysis generally requires an external heat source to maintain the temperature required and to avoid the introduction of air. There are a range of different types of kiln/reactor used, often aligned to the waste being processed, and include fixed bed reactors, batch or semi-batch reactors, rotary kilns, fluidized bed reactors, microwave assisted reactors and some innovative solutions like plasma or solar reactors <ref> Czajczyńska et al, 2017. Potential of pyrolysis processes in the waste management sector. Thermal Science and Engineering Progress, [online] 3, pp.171-197. </ref>. The [[Syngas|syngas]] produced in the process can be burnt to raise steam and create electricity, but most plants are exploring the option of cleaning the [[Syngas|syngas]] for use in a gas engine or separating the gas into usable fractions such as hydrogen for use, as an example, as liquid fuels. The solid residue (sometimes described as a char) is a combination of non-combustible materials and carbon. Hydrous pyrolysis/[[Hydrothermal Liquefaction|hydrothermal liquefaction]] is a from of pyrolysis that converts wet biomass into biocrude oil and chemicals.