Pre-treatment of lignocellulosic biomass type material for use in production of synthesis gas, involves subjecting dried material to torrefaction, and constituting suspension of biomass particles and optional hydrocarbon particles

摘要

#CMT# #/CMT# A lignocellulosic biomass type material (A) is primarily dried at less than 250[deg] C, and subjected to torrefaction at 250-320[deg] C with a residence time of 10-40 minutes. The material is milled to produce biomass particles (5) having a diameter of less than 200 microns. A suspension (17) of biomass particles and optionally other solid hydrocarbon particles is then constituted in a liquid hydrocarbon cut, with suspension comprising 30-80 wt.% of solid particles. #CMT#USE : #/CMT# Pre-treatment of lignocellulosic biomass type material to produce suspension for use in production of synthesis gas (claimed) useful in production of energy (for synthesizing gasoline and gas oil), or as starting material for production of bases for chemistry and petrochemistry. The lignocellulosic biomass type materials include agricultural waste (straw), forestry residues (products resulting from thinning of forest), forestry products, and dedicated culture (short coppice rotation). #CMT#ADVANTAGE : #/CMT# The method optimizes conditioning of the starting material with a view to its subsequent treatment in a gasification unit, more particularly an entrained bed gasification unit which requires a relatively well graded particle size at the inlet. The method consumes less energy. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic flow sheet of the pre-treatment process. 4 : Dry biomass 5 : Biomass particles 17 : Suspension A : Lignocellulosic biomass type material B : Primary mill.