摘要 |
<p>Pressure swing adsorption (PSA) assemblies with purge control systems, and hydrogen-generation assemblies and/or fuel cell systems containing the same. The PSA assemblies (73) are operated according to a PSA cycle to produce a product hydrogen stream (42) and a byproduct stream from a mixed gas stream. The byproduct stream may be delivered as a fuel stream to a heating assembly (71), which may heat the hydrogenproducing region that produces the mixed gas stream. The PSA assemblies may be adapted to regulate the flow of purge gas utilized therein, such as according to a predetermined, non-constant profile. In some embodiments, the flow of purge gas is regulated to maintain the flow rate and/or fuel value of the byproduct stream at or within a determined range of a threshold value, and/or to regulate the flow of purge gas to limit the concentration of carbon monoxide in a heated exhaust stream produced from the byproduct stream.</p> |