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Hydrogen

Question
CBSEENCH11006890

How is dihydrogen manufactured by Lane's process?

Solution

Lane's process consists of two stages:
(i) Oxidation stage: Super -heated steam is passed over iron filings, at 1023-1073 K when dihydrogen is formed.
               3 Fe space plus space stack 4 straight H subscript 2 straight O with Steam below space space space rightwards arrow space space space space stack Fe subscript 3 straight O subscript 4 space plus space 4 straight H subscript 2 with Magnetic space oxide below
(ii) Reduction stage: Iron is regenerated by reducing magnetic oxide with water gas (CO + H2). This reaction is called vivification.
Fe subscript 3 straight O subscript 4 space plus space 4 CO space space rightwards arrow space space space 3 Fe space plus space 4 CO subscript 2
Fe subscript 3 straight O subscript 4 space plus space space 4 straight H subscript 2 space space rightwards arrow space space space 3 Fe space plus space 4 straight H subscript 2 straight O
Thus, by passing steam and water gas alternatively over iron, dihydrogen gas can be manufactured from a small quantity of iron.