08921637 is referenced by 10 patents and cites 269 patents.

A process for separating methane from a natural gas mixture employs pressure swing adsorption in one or more vessels. Each vessel has an adsorbent material having a kinetic selectivity for contaminants over methane greater than 5. Contaminants within the natural gas mixture become gases kinetically adsorbed within the adsorbent material. The vessel is placed under pressure to cause contaminants to be adsorbed in the surfaces and micro-pores of the adsorbent material. The process includes releasing a product stream comprised at least 95% by volume methane from a first gas outlet in the vessel, and desorbing the contaminant gases from the adsorbent material by reducing the pressure within the vessel. The desorbing step is done without applying heat to the vessel, thereby delivering a waste gas stream comprised at least 95% by volume of the contaminant gases. An improved fractionation vessel having both major and minor flow channels is also provided.

Title
Kinetic fractionators, and cycling processes for fractionation of gas mixtures
Application Number
13/877315
Publication Number
8921637 (B2)
Application Date
September 26, 2011
Publication Date
December 30, 2014
Inventor
P Scott Northrop
Spring
TX, US
Narasimhan Sundaram
Annandale
VA, US
Agent
ExxonMobil Upstream Research Company Law Department
Assignee
ExxonMobil Upstream Research Company
TX, US
IPC
B01D 53/04
C10L 3/10
B01D 53/047
C07C 7/12
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