Process of treating a net gas stream is disclosed. The process includes sending the net gas stream to a compressor to produce a compressed gas stream. The compressed gas stream is then sent to a pressure swing adsorption unit to produce a hydrogen product stream and a tail gas stream. Tail gas stream from the pressure swing adsorption unit is sent to a first membrane unit to produce a first permeate stream and a first non-permeate stream. Portion of the tail gas stream is sent to a second membrane unit to produce a second permeate stream and a second non-permeate stream.

An apparatus for improving thermal efficiency of steam production is provided. In one embodiment, the apparatus can include: a BFW heat exchanger in fluid communication with a hydrocarbon gas source and a boiler feed water source, wherein the BFW heat exchanger is configured to allow for the natural gas stream to exchange heat with the first BFW stream such that the hydrocarbon gas stream is pre-heated within the BFW heat exchanger and the BFW stream is cooled; a syngas production facility in fluid communication with the BFW heat exchanger, wherein the syngas production facility comprises a steam methane reformer (SMR) that is configured to convert natural gas within the hydrocarbon gas stream into a hot product stream comprising hydrogen and carbon monoxide, wherein the SMR comprises a plurality of burners; and a third heat exchanger in fluid communication with the first heat exchanger and the syngas production facility, wherein the third heat exchanger is configured to exchange heat between the hot product stream and the first BFW stream, thereby creating a hot BFW stream and a cooled product stream.

The invention relates to a hydrogen plant for producing a hydrogen-comprising gas product comprisinga reformer system comprising at least one heat-recuperating reformer reaction unit (5) or a reformer system comprising two or more reformer units (5,22) in parallel, wherein at least one of said parallel reformer units (5) is present in the radiant section (12) of the reformer system, and at least one reformer unit (22) is located outside the radiant section (12) of the reformer system; a unit (8) configured to obtain hydrogen product gas; a carbon dioxide capture unit; the hydrogen plant further comprising a passage way configured to feed a hydrogen-comprising gas stream to the radiant section. The invention further relates to a process for producing a hydrogen-comprising gas product.

Systems and methods are provided for using a high heat capacity gas as at least a portion of the diluent during the regeneration step of a reverse flow reactor process. Instead of using nitrogen or air as the primary diluent gas, CO.sub.2 and/or H.sub.2O can be added as diluent gas for the regeneration step in the reaction cycle. Increasing the heat capacity of the diluent gas provides a reduction in the peak temperature within the reactor relative to the amount of fuel combusted during regeneration. This can allow for a reduction in the volume of diluent used during regeneration and/or an increase in the amount of fuel used. Reducing the volume of diluent can reduce the pressure drop during regeneration, which can provide a corresponding reduction in the amount of compression required for recycle of the diluent. Increasing the amount of fuel can allow for a corresponding increase in the amount of endothermic reaction performed during the reaction step.

Embodiments of the invention are directed to methods, processes, and systems for safely and reliably purifying hydrogen from a gas mixture containing hydrogen and oxygen.

In a process for separating a mixture containing carbon monoxide, hydrogen and carbon dioxide, the mixture cooled in a heat exchanger is contacted by a stream of liquid methanol at a temperature below 40 C. to produce carbon dioxide enriched methanol and a carbon dioxide depleted gas relative to the cooled mixture, the carbon dioxide depleted gas is cooled in the heat exchanger and is sent to a separation unit to produce a carbon monoxide enriched stream and a hydrogen enriched stream and the streams enriched in carbon monoxide and hydrogen are heated in the heat exchanger by exchanging heat with the mixture.

The present disclosure relates to cogeneration of power and one or more chemical entities through operation of a power production cycle and treatment of a stream comprising carbon monoxide and hydrogen. A cogeneration process can include carrying out a power production cycle, providing a heated stream comprising carbon monoxide and hydrogen, cooling the heated stream comprising carbon monoxide and hydrogen against at least one stream in the power production cycle so as to provide heating to the power production cycle, and carrying out at least one purification step so as to provide a purified stream comprising predominately hydrogen. A system for cogeneration of power and one or more chemical products can include a power production unit, a syngas production unit, one or more heat exchange elements configured for exchanging heat from a syngas stream from the syngas production unit to a stream from the power production unit, and at least one purifier element configured to separate the syngas stream into a first stream comprising predominately hydrogen and a second stream.

The present disclosure discloses a method for preparing hydrogen from secondary aluminum ash, including the following steps: S1. preparing secondary aluminum ash, and subjecting a reaction device to an oxygen replacement treatment; S2. feeding the secondary aluminum ash into the reaction device, adding water, conducting a first hydrolysis reaction to obtain a first gas, and introducing the first gas into a gas collection cabinet; S3. adding calcium hydroxide and sodium hydroxide subsequently to the reaction device, conducting a second hydrolysis reaction to obtain a second gas, and introducing the second gas into the gas collection cabinet; and S4. subjecting a gas mixture in the gas collection cabinet to separation and purification to obtain hydrogen. The method is conducive to improving a hydrogen yield and reducing the toxicity of process products.

High purity hydrogen is produced by a steam reforming hydrogen production unit with at least one of a bayonet reactor for reforming steam and a hydrocarbon, a recuperative burner, and a regenerative burner such that the steam reforming unit produces little or no steam in excess of the steam reforming process requirements. High purity hydrogen is separated from the syngas exiting the reformer via a pressure swing adsorption unit and combined with high purity nitrogen from an air separation unit as feedstock to a Haber process ammonia synthesis unit. Compressors for the ammonia synthesis unit are driven by higher efficiency drivers than are possible using the low temperature steam conventionally exported from a steam reforming unit. Compression power requirements are reduced.

An apparatus and method for purifying a raw hydrogen gas stream of chloramines and chlorine is provided. The explosive chloramines compounds can be effectively captured by the carbon adsorbent without accumulating on the carbon surface. Rather, the chloramines are converted via decomposition, into non-explosive products with catalytic effect of the carbon material. Chlorine reacts with impregnated reducing agent on the carbon surface to form the solid products, which can be adsorbed on the carbon surface. The purified hydrogen gas contains little to no trace of chloramines and chlorine impurities, thereby making the hydrogen gas suitable for liquid hydrogen production.