286667 Novel Membranes, Membrane Separation Techniques and Technologies

Monday, October 29, 2012: 10:00 AM
406 (Convention Center )
Kamalesh K. Sirkar, Chemical, Biological and Pharmaceutical Engineering, New Jersey Institute of Technology, Newark, NJ

There are numerous ongoing investigations in supposed frontiers in membranes and membrane separation technologies. In our laboratories we have been pursuing a few of them. This talk will identify the problems, the approaches we are studying and the membrane separation results being achieved. The problems involve thermal desalination methods, treating strongly oxidizing aqueous solutions, processing powerful organic solvent systems, and removing and recovering CO2 from post combustion flue gas as well as precombustion syngas. In thermal desalination methods we will illustrate first our results on direct contact membrane distillation (DCMD) for temperatures between 50 to 1300C and operation with salt concentrations between 0.2- 20 wt%. In airgap membrane distillation (AGMD) we will next show how a two hollow-fiber-set based compact device can be a highly productive desalination device without any need for a cooling water stream to start with. We will next focus on the performances of a perfluoropolymer membrane having exceptional chemical and thermal resistance. This membrane can concentrate a very dilute aqueous solution of H2O2 to as much as 40% H2O2 by simple pervaporation under almost ambient conditions. Further this membrane can dehydrate powerful aprotic solvents such as DMF, DMSO, DMAc with selectivities in the range of 1000-12000 characteristic of zeolite membranes in dehydration of ethanol. We will conclude by describing two new techniques and the corresponding membranes/processes to remove CO2 from flue gas or from hot precombustion syngas at a high pressure.

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