TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: The alkaline compound is selected from sodium hydroxide, potassium hydroxide, lithium hydroxide, calcium hydroxide, calcium oxide, sodium acetate, potassium acetate and calcium acetate, with cracking controlled at 400-900 degreesC. Such alkaline compound is especially calcium hydroxide or calcium oxide. The calcium hydroxide is charged into the reaction vessel by using the extract in the separator through the pump and pipe for transferring the calcium hydroxide emulsion to mix with the plant material homogeneously and with the release of excess emulsion.    TECHNOLOGY FOCUS - AGRICULTURE - Preferred Process: The plant material can be branches and leaves of trees, bamboo pieces, straw, stem and seed of crops, pulp, skin/peel, core, shell and kernel of fruit, various weeds, grass, vegetation, wood dust and sugar residues for processing into granules or flakes with granular diameter of 1-10 mm and flake thickness of 0.2-2 mm and area of 10-1000 mm2.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The low-molecular combustible gas is separated into liquefiable and difficult-to-liquefy combustible gases using a separator.    TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Process: Heating of the reaction vessel is from top to bottom by the heated gas supplied from an inlet at the upper part of the vessel before discharging at its lower part.Preferred Apparatuses: The generated combustible gas is discharged through the pipe via a 3-way valve for division into 2 routes, one of which is for transferring the gas to a condenser for separation, while the other is connected to a distillation unit with an exit at the top for removing the difficult-to- liquefy combustible gas which is used as a heating source for heating the reaction vessel or heater for gasification and a middle exit in the distillation unit is for discharging the liquefiable combustible gas for bottling. EXAMPLE - The apparatus was assembled as specified for use. Plant materials were extracted to provide phytic acid, and then the residue was mixed with calcium hydroxide (more environmentally friendly) for cracking at 500 degreesC, at ambient pressure. Phytic acid produced was 3.24%, with 1-2C combustible gas at 23.7%, 3-4C combustible gas at 36.9% and not less than 5C combustible gas at 16.2%.