NOVELTY - An apparatus (40) comprises: gas purification chamber; first and second getter compounds comprising cobalt nitrate and lithium hydride, where hydrogen gas stream contacts cobalt nitrate first and then contacts lithium hydride; and gas outlet (33) in fluid communication with the chamber. The two getter compounds are separately contained within one of interior zones of chamber as finely divided, loosely packed powder, and the hydrogen gas passes through each of powders, where compounds chemically react with small amounts of ammonia to remove ammonia from hydrogen gas.    USE - For providing ammonia-free hydrogen (claimed); for removing trace amounts of ammonia from a stream of gas, particularly hydrogen gas, prepared by a reformation apparatus; for removing ammonia from hydrogen generating reactors including reformate-produced fuels; and for reducing ammonia contamination in a reformate fuel to an acceptable level on a continuous basis.    ADVANTAGE - The apparatus prevents polymer electrolyte membrane (PEM) poisoning in a fuel cell receiving the incoming hydrogen stream; and is applied to a source of hydrogen feedstock to reduce ammonia contamination to an acceptably low level for use in a fuel cell.    DETAILED DESCRIPTION - An apparatus (40) for providing substantially ammonia-free hydrogen, comprises: gas purification chamber comprising at least two gas permeable separation barriers (35), where the barriers are parallel to each other and span a cross-section of the gas purification chamber and dividing the chamber into at least two interior zones and a gas inlet (32) in fluid communication with it through which a stream of hydrogen gas contaminated with trace amounts of ammonia is optionally introduced into the gas purification chamber; first and second getter compounds comprising cobalt nitrate and lithium hydride; and gas outlet (33) in fluid communication with the gas purification chamber through which ammonia-free hydrogen gas can be released from the chamber. The hydrogen gas stream contacts the cobalt nitrate first and then contacts the lithium hydride. The first and second getter compounds are separately contained within one of the interior zones of the gas purification chamber as a finely divided, loosely packed powder, and the hydrogen gas passes through each of the loosely packed powders, where the first and second getter compounds chemically react with the small amounts of ammonia thus removing the ammonia from the hydrogen gas.    DESCRIPTION OF DRAWING(S) - The figure shows a cut-away diagram of a simplified reactor containing multiple gas reaction zones, where first zone is used for drying the incoming gas and successive zones are use for removing decreasing quantities of ammonia from a gas stream to passing through the reactor.    Getter media (14)    Container (31)    Gas inlet (32)    Gas outlet (33)    Drying material (34,48)    Gas permeable mechanical barrier (35)    Device (40)    Separating zones (40a,40b)