Method of Operation of Process to Produce Syngas from Carbonaceous Material

A process to produce syngas, said method comprising:

• (a) adding carbonaceous material and molecular oxygen to a gasification apparatus to produce a first syngas with CO/CO2 molar ratio less than 0.5;
• (b) measuring temperature of said first syngas downstream of said gasification apparatus;
• and
• (c) upon said temperature of said first syngas prior to entry in said syngas cooler attaining a first target temperature, reducing the addition of molecular oxygen per unit mass of carbonaceous material in said gasification apparatus to produce a second syngas with CO/CO2 molar ratio greater than that of said first syngas.

A process comprising gasifying carbonaceous material in a gasification apparatus to produce a syngas, said method comprising:

• (a) adding carbonaceous material and adding molecular oxygen in said gasification apparatus to produce a first syngas with CO/CO2 molar ratio less than 0.5;
• (b) passing at least a portion of said first syngas through said syngas cooler to produce a cooled first syngas;
• (c) passing at least a portion of said cooled first syngas through a dust collection system to produce a cleaned syngas;
• (d) measuring a temperature of said cleaned syngas at an exit of the dust collection system;
• and
• (e) upon said temperature of cleaned syngas attaining a second target temperature, reducing addition of molecular oxygen per unit mass of carbonaceous material in said gasification apparatus to produce a second syngas with CO/CO2 molar ratio greater than that of said first syngas.