RE: Electron worry?24 Sep 2022 11:56
I believe that this answers your question CB.
The DMG process involves the plastic being heated to a very high temperature, within a few seconds it melts and then vaporises into a mixture of gases. Further heating within the Chamber reforms the molecules into a synthetic gas known as “syngas”, comprising a mixture of methane, hydrogen and a smaller volume of carbon monoxide. The Thermal Conversion Chamber operates in the absence of oxygen, so there is no burning. However a non-combusting oxidising agent in the form of steam is added to control the process and the quality of the syngas. Once through the Conversion Chamber the syngas is cleaned, leaving behind a few inert residues, which are typically less than 5% of the starting volume of waste plastics. These residues can then be reused for other purposes or disposed of safely.
The resulting gas is similar in calorific value to the Natural Gas used as the fuel for cooking and heating homes and businesses across the country.
A small portion of the syngas produced is used to provide the heat required to run the Thermal Conversion Chamber, making the whole process self-sustaining once running; a small amount of natural gas being required to start it.
So we have the first stage at about a 1000 degrees C and the second stage at 100 degrees C for the steam control process. Much like Electrons process. So I see no difference in the two methods. The other point is the science park has a small scale FOAK DMG plant running now. Whereas Electrons process still at the first stage of design for the thermal conversion chamber. A further steam cleaning process is used to clear up any pesky tars that are produced.
MJA