TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The porous inorganic support comprises an oxide of a metal selected from silicon, aluminum, magnesium, titanium and/or zirconium.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The process is carried out at temperature (preferably not greater than 230 degrees C) that is less than a temperature at which the solid, strongly acidic catalyst material becomes unstable, for 0.5 minute to 100 hours (preferably 15-6400 minutes, especially 30-300 minutes) that is less than a time to effect a complete conversion of methane to its full oxidation products, carbon monoxide and carbon dioxide, under a methane pressure of 25- 2000 (preferably 150-1500, especially 250-1000, particularly 500-1000) psig, measured at 150 degrees C. The sulfur trioxide and methane are present in a mole ratio of 0.1-10 (preferably 2-5) moles of methane per mole of sulfur trioxide. The portion of selectively and partially oxidized methane represents a partial oxidation product yield of more than one mole percent, based upon moles of sulfur trioxide. The partial oxidation product yield is at least 1.5 (preferably 3) mol.%, based upon moles of sulfur trioxide. The process is a batch process, a continuous process or a semi-batch process.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The solid, acidic catalyst material is at least one solid, strongly acidic catalyst material. The solid, strongly acidic catalyst material is a heterogeneous superacid catalyst or a supported catalyst. The heterogeneous superacid catalyst is selected from a perfluorinated organo-sulfonic acid polymer, a composite of a perfluorinated organo-sulfonic acid polymer and a porous inorganic support. The supported catalyst comprises at least one transition metal selected from palladium, vanadium and cerium (preferably palladium) on a composite of a perfluorinated organo-sulfonic acid polymer and a porous inorganic support. The supported catalyst has a palladium metal loading of 1-4 (preferably 2.2-3, especially 2.4-2.9) wt.%. EXAMPLE - An aliquot of NAFION (RTM: perfluoro sulfonic acid catalyst) SAC-13 (10.1 g) was dried under high vacuum (less than 10 mm mercury (Hg)) at ambient temperature for approximately 0.5 hour to give a dried aliquot. A mixture containing palladium(II) acetate (0.515 g) and methylene dichloromethane (CH2Cl2) (10.5 ml) was filtered through a 0.45 mu m filter to give a dark colored, homogeneous CH2Cl2 solution. The dried aliquot was applied with CH2Cl2 solution (5 ml) to give a wetted catalyst. The wetted catalyst was dried under high vacuum (less than 10 mm Hg) at ambient temperature overnight ( approximately 12 hours) to give a tan/light brown solid (S1) (10.3 g) containing palladium (Pd) ( approximately 2.4 wt.%). A Parr pressure reaction vessel was charged with the tan/light brown solid (S1) (0.9 g) as catalyst. The reactor was charged with solid sulfur trioxide (SO3) (5.3 g), and pressurized with the methane (CH4) to 508 pounds per square inch gauge to provide a molar ratio of CH4:SO3 of 2.2/1. The contents in the reactor were heated at 150 degrees C for 4.5 hours and cooled to ambient temperature. An yellow-colored liquid (15.6 g) having a pH of less than 1 and containing some solids was pipetted from the vessel. The liquid formed had CH3OX (where X was hydrogen (H) or a sulfonic acid (SO3H) moiety) content of 8.5 mmol (i.e. the CH3OX yield was approximately 13 mol.% based on 66 mmol of SO3).