Pressure swing adsorption product purity control method and apparatus
A process for controlling the level of impurity in a gas product stream from a pressure swing adsorption process is described. It includes a cocurrent depressurization step, comprising: sensing a characteristic of the effluent from the cocurrent depressurization step; and taking a corrective action responsive to the sensed characteristic, the action being effective to vary the impurity concentration in the product gas in the direction necessary to obtain desired product purity. An apparatus for controlling the level of impurity in a gas product stream from a pressure swing adsorption process is also described. It includes a cocurrent depressurization step, comprising: means for sensing a characteristic of the effluent from the cocurrent depressurization step; and means for taking a corrective action responsive to the sensed characteristic, the action being effective to vary the impurity concentration in the product gas in the direction necessary to obtain desired product purity.
- Assignee:
- Union Carbide Corp., Danbury, CT
- Patent Number(s):
- US 4693730
- OSTI ID:
- 5975633
- Country of Publication:
- United States
- Language:
- English
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