Patent ID: 11920100
Assignee: nan
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  Y | IPC C

Claim 16:
17. A process for producing a solid biomass fuel, wherein the process comprises the following steps:
(i) pulverising one or more sources of biomass to provide a biomass powder with an average particle diameter (D50) of from 1000 μm to 6000 μm;
(ii) molding the biomass powder with a compression mold to provide a molded biomass product having a bulk density of from 1.1 kg/l to 1.25 kg/l; wherein the molding is adapted such that the density of the molded biomass product is controlled by using a compression ratio of the compression mold of from 3.8 to 6.5; and
(iii) heating the molded biomass product to a temperature of from 160° C. to 420° C. for a time period of from 0.25 to 5 hours so as to provide a solid biomass fuel; wherein step (iii) of heating the molded biomass product is adapted so as to control the uniformity of the solid biomass fuel, wherein adapting step (iii) so as to control the uniformity of the solid biomass fuel comprises conducting step (iii) in an apparatus in which the molded biomass product is rotated whilst being heated, wherein adapting step (iii) so as to control the uniformity of the solid biomass product comprises controlling the speed or direction of rotation of the solid biomass product,
wherein the one or more sources of biomass comprise (i) Calliandra calothyrsus or (ii) a mixture of straw, rice husk, and coconut shell; and wherein the bulk density of the solid biomass fuel as determined according to DIN EN 15103 is from 0.6 kg/l to 0.8 kg/l and wherein the mechanical durability of the solid biomass fuel as determined according to DIN EN 15210-1 is 95% or more.