NOVELTY - A hydrogen purification module comprises: (i) hydrogen permeable membrane(s) having two sides; (ii) inlet gas metallic unit, effective to channel a hydrogen-containing inlet gas across first side of hydrogen permeable membrane; (iii) hydrogen collector metallic unit for receiving permeated hydrogen gas from second side of hydrogen permeable membrane; and (iv) metallic support unit(s) operative to mechanically support hydrogen permeable membrane when differential pressure is exerted across two sides of hydrogen permeable membrane.    USE - A hydrogen purification module used for supplying hydrogen for fuel cells, purifying commercial grade hydrogen for semiconductor processing, supplying hydrogen for food industry, or purifying hydrogen from electrolysis stream for laboratory uses.    ADVANTAGE - The purifier module has improved mechanical support for permeable membrane, enabling forward or reverse differential pressurization of membrane. The support structure prevents membrane from wrinkling upon hydrogen uptake, which improves durability of membrane.    DETAILED DESCRIPTION - A hydrogen purification module comprises: (i) hydrogen permeable membrane(s) (2b) having two sides; (ii) inlet gas metallic unit, effective to channel a hydrogen-containing inlet gas across first side of hydrogen permeable membrane, where first side is normally pressurized in operation; (iii) hydrogen collector metallic unit for receiving permeated hydrogen gas from second side of hydrogen permeable membrane, where second side is normally at lower gas pressure than first side; and (iv) metallic support unit(s) operative to mechanically support hydrogen permeable membrane when differential pressure is exerted across two sides of hydrogen permeable membrane, and metallic support screen (2a, 2c) is juxtaposed between hydrogen permeable membrane and hydrogen collector metallic unit. The hydrogen collector metallic unit is operative to mechanically support metallic support screen when hydrogen-containing inlet gas pressure is higher than permeated hydrogen (8) gas pressure, where metallic support unit allows passage of permeated hydrogen through its structure. The inlet gas metallic unit is operative to mechanically support hydrogen permeable membrane in event that the membrane permeated hydrogen gas pressure becomes higher than hydrogen-containing inlet gas pressure, preventing damage to hydrogen-permeable membrane. An INDEPENDENT CLAIM is included for a plating or coating which melts, and contains lead, tin, bismuth, tellurium, selenium, indium, cadmium, or zinc. The plating or coating further comprises additional plating or coating which supplies elements for formation of alloy with melting elements. The additional plating or coating contains gold, silver, copper, nickel, palladium and/or platinum. A compressive seal in module is formed of material containing graphite. A compressive plate in module is formed by water-jet cutting.    DESCRIPTION OF DRAWING(S) - The drawing shows cross-sectional view of parts comprising hydrogen purifier element.    Purifier element (1)    Support screen (2a, 2c)    Hydrogen permeable membrane (2b)    Raffinate plate (4)    Permeated hydrogen (8)