Operations And Supply Chain Management Assignment Help – Ultra-pure hydrogen

Operations And Supply Chain Management Assignment Help – Ultra-pure hydrogen

Question – Ultra-pure hydrogen is required in applications ranging from the manufacturing of semiconductors to _x000D_
powering fuel cells. The crystalline structure of palladium allows only the transfer of atomic hydrogen _x000D_
(H) through its thickness, and therefore palladium membranes are used to filter hydrogen from _x000D_
contaminated streams containing mixtures of hydrogen and other gases. Hydrogen molecules (H2) _x000D_
are first adsorbed onto the palladium’s surface and are then dissociated into atoms (H), which _x000D_
subsequently diffuse through the metal. The H atoms recombine on the opposite side of the _x000D_
membrane, forming pure H2. The surface concentration of H takes the form CH = KspH20.5, where _x000D_
Ks Ëœ 1.4k mol/m3 · bar 0.5 is known as Sievert’s constant. Con …Read Moresider an industrial hydrogen purifier _x000D_
consisting of an array of palladium tubes with one tube end connected to a collector plenum and the _x000D_
other end closed. The tube bank is inserted into a shell. Impure H2 at T = 600 K, p = 15 bars, XH2 = _x000D_
0.85 is introduced into the shell while pure H2 at p = 6 bars, T = 600 K is extracted through the tubes. _x000D_
Determine the production rate of pure hydrogen (kg/h) for N = 100 tubes which are of inside diameter _x000D_
Di = 1.6 mm, wall thickness t = 75µm, and length L = 80 mm. The mass diffusivity of hydrogen (H) in _x000D_
palladium at 600 K is approximately DAB = 7 x 10-9 m2/s. …Read Less


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