초록 ▼

Substantially all of the carbon dioxide is removed from a gas containing up to about 1% by volume carbon dioxide by subjecting the gas to a pressure swing adsorption process using as the adsorbent a single layer of zeolite having a silicon to aluminum atomic ratio in the range of 1.5 to 70. The proc

Substantially all of the carbon dioxide is removed from a gas containing up to about 1% by volume carbon dioxide by subjecting the gas to a pressure swing adsorption process using as the adsorbent a single layer of zeolite having a silicon to aluminum atomic ratio in the range of 1.5 to 70. The process is particularly suitable for removing substantially all carbon dioxide and water vapor contained in air prior to subjecting the air to cryogenic distillation.

대표청구항 ▼

[ What is claimed is:] [1.] A method of removing carbon dioxide from air containing up to about 1000 ppm carbon dioxide by a pressure swing adsorption process having an adsorption step and an adsorbent regeneration step, the adsorption step of which comprises passing said gas through an adsorption z

[ What is claimed is:] [1.] A method of removing carbon dioxide from air containing up to about 1000 ppm carbon dioxide by a pressure swing adsorption process having an adsorption step and an adsorbent regeneration step, the adsorption step of which comprises passing said gas through an adsorption zone containing an adsorbent comprising a layer of a zeolite selected from the group consisting of type Y zeolite, ferrierite, type EMT zeolite, beta, ZSM-5, ZSM-11, ZSM-12, ZSM-57, NU-87 and combinations of these, said zeolite having a silicon/aluminum atomic ratio in the range of about 1.5 to about 70, thereby producing a substantially carbon dioxide-free gas stream.