NOVELTY - Production of synthetic coal (char) from biomass or urban waste, comprises: sorting a material comprising biomass and/or waste to remove foreign materials; shredding the sorted material; pyrolyzing the sorted material at 500-600 degrees F by means of in situ viscous shear heating; and utilizing the liquid and gaseous byproducts of pyrolysis for the production of mechanical work used to cause the pyrolysis to occur.    USE - The process is useful for production of synthetic coal (char) from biomass or urban waste.    ADVANTAGE - The process: utilizes unique mixing using a viscous shear heating method, combined with the process temperature range, which maximizes the destruction of chlorinated hydrocarbons including dioxins, within the sorted material; utilizes unique heating method and temperature range combine to maximize the liberation and alkali sequestration of chlorine to minimize future formation of dioxins during combustion of the char product of the process and to maximize the energy efficiency of sorted materials pyrolysis; provides a solid fuel product with significantly lower potential for denovo dioxin formation than its sorted material, due to product high reactivity and high combustion temperature, and sequestration of chlorine by alkali salts present in any product ash, where the solid fuel product of the reactor has calorific value of 9000-10500 Btu/pound, the solid fuel product is similar in handling, storage and burning characteristics to high volatile bituminous coal, the solid fuel product is capable of reducing greenhouse gas emissions from combustion sources, compared to natural coal; utilizes in situ heating within and throughout the reactor provides rapid heating and conversion of the sorted materials without any limitations in reaction rate imposed by transfer of heat through reactor walls and other surfaces and provides conversion of the sorted materials without any limitations in product uniformity imposed by delivery of heat by conduction through contact with reactor wall surfaces, provides scaling of the reactor capacity based on the reactor mixing zone volume rather than area of heated surface; provides effective heating of sorted materials for the pyrolysis without risk of any ash softening and deposition on reactor walls and other surfaces; gains energy requirements of pyrolysis by the introduction of mechanical energy, which is converted to in situ heating of the sorted materials within the reactor by the process of viscous shear during mixing (all claimed); utilizes low reaction temperature, which effectively minimizes corrosion of reactor internal components, energy input and processing time; utilizes high capacity, continuous rector to produce large quantities of a synthetic coal (char) consistent with the end use fuel market it is intended to serve; and maximizes end product weight and energy yield; and is readily amenable to commercial scale large volume applications.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing synthetic char coal fuel from a feedstock comprising biomass, waste or a combination of biomass and waste, comprises sorting the feedstock to remove foreign materials, reducing the size of non-foreign feedstock, pyrolyzing the feedstock at 500-600 degrees F using viscous shear in-situ heating, to produce a granulated synthetic coal char fuel having a moisture content of 3% or less, collecting and cooling the granulated synthetic coal char fuel and collecting and utilizing the byproduct oils and gases to produce mechanical energy to import into the pyrolysis reactor to accomplish in situ heating of the sorted non foreign materials.