NOVELTY - Making a combustible material, involves: receiving at least one type of biomass, each of which includes an inorganic material; washing the biomass with solvent to drive inorganic materials from the biomass into the solvent to produce a inorganic-material-enriched solvent and a inorganic-material-depleted biomass; and pyrolyzing inorganic-material-enriched biomass to produce a combustible biomaterial.    USE - For making a combustible material (claimed) used in fuel, oil and natural gas.    ADVANTAGE - The method removes chamber-fouling inorganic materials from the biomass before subjecting it to combustion. By timely and proper removal of such inorganic materials, the method circumvents the drawbacks of slagging and fouling of the combustors encountered by the conventional systems and processes. The method provides the advantages of significantly higher throughputs and lower capital costs, which are not realized by the conventional systems and methods. The systems and methods effectively rupture the lignocellulose to access the combustible and non-combustible inorganic components inside biomass. By making the combustible and non-combustible inorganic components inside biomass accessible, the method uses a solvent to effectively remove the non-combustible inorganic material from biomass. The resulting biomaterial is a combustible product. The process is designed to remove the non-combustible inorganic material from biomass, mass transfer, i.e. transfer of non-combustible inorganic material that exist in the solid phase inside biomass to a solvent, is the rate-limiting step. Such a removal process, not mass transfer, but solubility limits of non-combustible inorganic material in the solvent, is the rate-limiting step. The method therefore represents a significant departure from such conventional wisdom.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) washing (m2) biomass, involving: receiving a first discrete amount of biomass; receiving a second discrete amount of biomass; washing the first discrete amount of biomass with solvent to produce a first effluent stream enriched with inorganic material; and washing the second discrete amount of biomass with the first effluent stream to produce a second effluent solvent stream;    (2) washing (m3) biomass involves: receiving N discrete amounts of biomass (where N is a whole number and is greater than 2); conducting a first washing cycle, which includes washing a first of N discrete amounts of biomass using a solvent to produce a first effluent stream associated with the first washing cycle, washing a second of N discrete amounts of biomass using the first effluent stream associated with the first washing cycle to produce a second effluent stream associated with the first washing cycle and washing other discrete amounts of biomass to satisfy a condition of washing the Nth discrete amount of biomass using an (N-1)th effluent stream associated with the first washing cycle; conducting a second washing cycle, which includes washing a second of N discrete amounts of biomass using a solvent to produce a first effluent stream associated with the second washing cycle, washing a second of N discrete amounts of biomass using the first effluent stream associated with the second washing cycle to produce a second effluent stream associated with the second washing cycle and washing other discrete amounts of biomass to satisfy a condition of washing the Nth discrete amount of biomass using an (N-1)th effluent stream associated with the second washing cycle;    (3) a system (200) for producing combustible biomaterial, comprising: a lignocellulose rupturing device (208) for rupturing lignocellulose in biomass (202,204,206) to produce a ruptured biomass material, where the ruptured biomass material has a inorganic material; a washing subassembly (210) designed to wash the ruptured biomass material having a inorganic material with a solvent and produce a inorganic-material-enriched solvent and a inorganic-material-depleted ruptured biomass; and a pyrolyzing subassembly (214) for pyrolyzing the inorganic-material-depleted ruptured biomass to produce a combustible biomaterial;    (4) a biomass washing sub-assembly, comprising: several bins, each of which is designed to hold a single discrete amount of biomass; a solvent dispenser for dispensing solvent at a location from where the solvent washes a first discrete amount of biomass when the first discrete amount of biomass is inside a first of the bins, to produce a first effluent stream; and a first pump for pumping the first effluent stream to a location from where the first effluent stream washes a second discrete amount of biomass when the second discrete amount of biomass is inside a second of the bins, to produce a second effluent stream;    (5) a composition (C1) of biomass material, comprising: a lignocellulosic material; and potassium ( not greater than 0.01 wt.%); or sodium ( not greater than 0.1 wt.%); or chlorides ( not greater than 0.1 wt.%).    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the system for producing combustible biomaterial from biomass.    System (200)    Biomass (202,204,206)    Lignocellulose rupturing device (208)    Washing subassembly (210)