Mohamed Hashi

US Patent:

20130312427, Nov 28, 2013

Filed:

May 24, 2012

Appl. No.:

13/479678

Inventors:

Mohamed Hashi - Tonawanda NY, US
Michael C. Johnson - Clarence Center NY, US
John Royal - Grand Island NY, US

International Classification:

F25B 9/06
F25B 9/14
B01D 53/02

US Classification:

62 6, 96128, 95 41

Abstract:

An air compression system and method for an air separation plant in which air is compressed in a series of compression stages and a temperature swing adsorption unit adsorbs water vapor and carbon dioxide. The temperature swing adsorption unit is situated at a location of the compression stages such that air pressure upon entry into the adsorbent beds is between about 400 psia and about 600 psia. Each of the adsorbent beds of the unit have a minimum transverse cross-sectional flow area that will set the air velocity of the air to a level below that at which adsorbent bed fluidization would occur. Such operation allows fabrication costs of the adsorbent beds to be reduced because less adsorbent and smaller adsorbent beds are required while power consumption will be at a minimum.

US Patent:

20170087505, Mar 30, 2017

Filed:

Sep 19, 2016

Appl. No.:

15/268704

Inventors:

Mohamed Hashi - Tonawanda NY, US
Cem E. Celik - Grand Island NY, US
James R. Dray - Buffalo NY, US

International Classification:

B01D 53/04

Abstract:

In a cyclic adsorptive gas purification process, an impurity laden adsorbent is regenerated by exposing it first to an unheated gas for a pre-determined time period to desorb at least some of the impurity, followed by heating the adsorbent using a flowing stream of a heated gas to desorb the remaining impurities over another pre-determined time period, further followed by cooling of the adsorbent using a flowing stream of gas for yet another pre-determined time period to make it ready for repeating the adsorptive cycle. Introducing an unheated purge stream reduces the energy requirements for the regeneration step compared to a traditional TSA process.