Patent ID: 11952282
Assignee: SOCIéTé BIOEB
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  F  Y | IPC C  F

Claim 0:
1. A low energy production method for producing carbon dioxide from a renewable lignocellulosic biomass feedstock comprising the following steps:
i) extracting lignins and hemicelluloses by putting at least one solid lignocellulosic raw material in a presence of a mixture, composed of at least water and formic acid, at atmospheric pressure under controlled conditions of temperature between 80° C. and 110° C., with a dilution ratio of said at least one solid lignocellulosic raw material/liquid mixture comprised between 1 and 15, and for a period of time, depending on a nature of the at least one lignocellulosic raw material;
ii) fractionating, at atmospheric pressure, a primary solid fraction and a primary liquid fraction obtained at an end of the preceding extracting step i);
iii) separating the lignins from an intermediate liquid fraction, and obtaining a residual liquid fraction;
iv) producing a synthetic gas by feeding a gasification equipment with at least one of at least part of said primary solid fraction or at least part of said residual liquid fraction;
v) producing carbon dioxide and water by introducing dioxygen, or dioxygen enriched air, or air in said gasification equipment.