20. of November 2016
Some old books state, that the gas should be quickly cooled down to <500*Celsius after the grate to stop this deteriorating.
So, by all means keeping the gas hot and "process-willing" for reduction, and then abrupt cooling it down to preserv the result!
Also, this tells about having enough reduction char for the motor's top demand. When temperatures below the grate start going abowe normal, the bells should be ringing.
Undoubtly, this trimming cannot be made completely by changing fuel size.
To assist in keeping a big enough top performance char volume, you need a means of sieving it (at tanking manually) or by a remote electrical motor during driving.
Remote mechanical grate shaking from the cabin was used in Germany under the WWII. (Zeuch)
The sieving mechanism can also be formed to regulate the active char volume.