Patent ID: 11873458
Assignee: VELOCYS TECHNOLOGIES LIMITED
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A process for the manufacture of a useful product from carbonaceous feedstock of fluctuating compositional characteristics, the process comprising the steps of:
continuously providing the carbonaceous feedstock of fluctuating compositional characteristics to a gasification zone;
gasifying the carbonaceous feedstock in the gasification zone to obtain raw synthesis gas;
recovering at least part of the raw synthesis gas from the gasification zone and supplying at least part of the recovered raw synthesis gas to a partial oxidation zone;
equilibrating the H2:CO ratio of the raw synthesis gas in the partial oxidation zone to obtain equilibrated synthesis gas;
recovering at least part of the equilibrated synthesis gas from the partial oxidation zone;
optionally adjusting the H2:CO ratio of at least part of the equilibrated synthesis gas to obtain adjusted equilibrated synthesis gas;, treating the optionally adjusted equilibrated synthesis gas to remove impurities and generate a fine synthesis gas;
optionally adjusting the H2:CO ratio of at least part of the fine synthesis gas to obtain adjusted fine synthesis gas; and
converting the optionally adjusted fine synthesis gas into the useful product in a further chemical reaction with a particular usage ratio;
wherein the fine synthesis gas H2:CO ratio is below the usage ratio and wherein any optional adjustment of at least part of the fine synthesis gas H2:CO ratio is effective only to increase the H2:CO ratio in the fine synthesis gas to a level at, nearer to or above the usage ratio;
wherein the H2:CO ratio of the raw synthesis gas fluctuates during operation of the process as a result of the fluctuating compositional characteristics of the carbonaceous feedstock by a percentage of ±x; and
the H2:CO ratio of the equilibrated synthesis gas does not fluctuate during operation of the process or fluctuates during operation of the process as a result of the fluctuating compositional characteristics of the carbonaceous feedstock by a percentage±y, y being a lower percentage than x.