NOVELTY - An apparatus has a hydrogen (H2) formation part of alkali metal lump. Water is reacted with an alkali metal compound or alkali metal contained in the alkali metal lump to form alkali metal hydroxide and H2. Carbon dioxide (CO2) in mixed gas is reacted with an alkali metal hydroxide aqueous solution, and removed. CO2 reducing gas and H2 are mixed and H2 rich gas with H2 concentration higher than mixed gas is ejected.    USE - For a fuel cell.    ADVANTAGE - Hydrogen partial pressure of the reformed gas obtained by reforming of hydrocarbon with heating gas containing hydrogen is increased.    DETAILED DESCRIPTION - A hydrogen enrichment apparatus (10) has hydrogen formation part equipped with alkali metal lump (13) covered by a film containing a stable material. The alkali metal lump comprises an alkali metal compound and alkali metal. Water is supplied to the hydrogen formation part by a supply unit. The film covering the alkali metal lump is damaged. The compound of alkali metal or alkali metal are made to contact and reacted with water to produce hydroxide of alkali metal and hydrogen. Aqueous solution of alkali metal hydroxide is produced by inducing unit. The mixed gas containing hydrogen and carbon dioxide is supplied. The alkali metal hydroxide aqueous solution is made to react with carbon dioxide in mixed gas and thereby carbon dioxide is removed. The amount of carbon dioxide in the mixed gas is reduced by carbondioxide removal unit which forms carbon dioxide reducing gas. Hydrogen and carbon dioxide reducing gas are mixed in inducing unit. The hydrogen rich gas formed with hydrogen concentration higher than mixed gas is ejected by an ejector.    An INDEPENDENT CLAIM is also included for fuel cell equipped with heating gas supply unit for supplying hydrogen rich gas ejected from hydrogen enrichment apparatus, as heating gas and oxidation gas containing oxygen. An electromotive force is produced according to electrochemical reaction.    DESCRIPTION OF DRAWING(S) - The figure shows the explanatory drawing hydrogen enrichment apparatus.    Hydrogen enrichment apparatus (10)    Alkali metal lump (13)