초록 ▼

A PSA based process for the production of technical hydrogen wherein the feed to the PSA contains nitrogen and carbon monoxide with a hydrogen/(carbon monoxide+nitrogen) volume ratio in the range 1.2 to 4 and a nitrogen/carbon monoxide volume ratio of at least 10. The adsorption step in the PSA stag

A PSA based process for the production of technical hydrogen wherein the feed to the PSA contains nitrogen and carbon monoxide with a hydrogen/(carbon monoxide+nitrogen) volume ratio in the range 1.2 to 4 and a nitrogen/carbon monoxide volume ratio of at least 10. The adsorption step in the PSA stage is stopped when the integrated nitrogen content of the unadsorbed product is 1 to 10% volume. The raw gas fed to the PSA is preferably made by primary reforming a hydrocarbon feedstock with steam followed by secondary reforming followed by shift and water removal: the heat required for primary reforming is preferably supplied by the secondary reformer outlet gas. The PSA waste gas is preferably combusted in a gas turbine driving the secondary reformer air compressor.

대표청구항 ▼

A pressure swing adsorption (PSA) process for producing a technical hydrogen stream comprising (a) feeding to the PSA adsorbent a raw gas containing hydrogen, nitrogen, and carbon oxides, wherein the volume ratio of hydrogen to the sum of nitrogen and carbon monoxide is in the range 1.2 to 4.0 and t

A pressure swing adsorption (PSA) process for producing a technical hydrogen stream comprising (a) feeding to the PSA adsorbent a raw gas containing hydrogen, nitrogen, and carbon oxides, wherein the volume ratio of hydrogen to the sum of nitrogen and carbon monoxide is in the range 1.2 to 4.0 and the nitrogen content by volume is at least ten times the carbon monoxide content, and (b) stopping the adsorption step in the PSA cycle when the integrated nitrogen content of the unadsorbed product gas of the PSA stage is in the range 1 to 10% by volume.