NOVELTY - Method (M1) for drying a combustible cellulosic fibrous material, involves: drying the material in a drying unit, which comprises a heat source that indirectly provides heat to the material, during the drying.    USE - For drying and pelletizing a combustible cellulosic fibrous material (such as paper mill sludge, wood chips, paper fiber, cherry pits, olive pits, sugar-cane bagasse, sweet sorghum bagasse, grass clippings, and/or fur trees) to form a pelletized combustible cellulosic fibrous material; useful as a renewable biomass to generate energy and/or as biofuel in the power generation sector (claimed).    ADVANTAGE - The method provides an improved method and device for pelletizing a combustible cellulosic fibrous material, from biomass materials; such as paper mill sludge, wood chips, paper fiber, cherry pits, olive pits, sugar-cane bagasse, sweet sorghum bagasse, grass clippings, and/or fur trees; on industrial scale. The method involves drying the material prior to pelletizing using heat source that indirectly provides heat to the material, while reducing the high fire risks associated with prior art methods performed at high drying temperatures. The method involves drying in a rotary dryer; such as spinning tube dryer, using saturated steam as a heat source at 170 - 185degreesC inside tubes and results in temperatures of 135 - 140degreesC on external surfaces of tubes; at a pressure of 8.34 - 9.81 bar (8.5 - 10 kgf/cm2) inside the tubes. This results in pelletized combustible cellulosic fibrous material from bagasse having high calorific value; such as upper calorific content of 4500 - 5500 kcal/kg, lower calorific content of 3500 - 4500 kcal/kg, density of 500 - 600 kg dry matter/m3, and humidity of (10 - 15)%; and provides a cleaner fuel having desired calorific value, consistency and price requirements for transportation.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) method (M2) for pelletizing combustible cellulosic fibrous material, involving: (a) providing and feeding unprocessed combustible cellulosic fibrous material; (b) cleaning the unprocessed material; (c) drying the cleaned unprocessed material by method (M1); (d) pelletizing the dried material, and (e) sorting and drying the pelletized material;    (2) a device (D1) for method (M2) comprising: a drying unit for drying the material, which comprises a heat source that indirectly provides heat to the material when drying the combustible cellulosic fibrous material;    (3) a device (D2) for method (M2) comprising: a continuous feeding unit, a cleaning unit, a drying unit, a pelletization unit, a sorting and second drying unit, and optionally a storing unit; and    (4) pelletized combustible cellulosic fibrous material, obtained by the method (M2).