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A flat polymeric membrane sensor for carbon dioxide/nitrogen gas mixture

Shabani, E ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1080/00986445.2016.1277519
  3. Publisher: Taylor and Francis Ltd , 2017
  4. Abstract:
  5. A gas sensor was developed to measure the concentration of binary gas mixtures. This sensor works based on the permeability change of different gas mixtures across the polymeric membranes. Although high values of permeability and selectivity are needed for an ideal separation, the performance of this sensor mainly depends on the permeability factor. Polysulfone and silicone rubber were applied as the membrane base and coat, respectively. Moreover, in contrast to existing polymeric sensors that use hollow fibers, the present sensor is made of flat membranes. This new design is cheaper, smaller, and easier to use in comparison to the hollow fiber polymeric sensors. In order to test the sensor applicability, nitrogen and carbon dioxide were used as model gases. The effect of pressure on the response time and sensor accuracy was studied for the aforementioned gases. The response time (T95%) of this low price sensor was 50 s, and the tolerance of measuring concentration was approximately 1.4% at 2 bar feed pressure. Also, increasing the feed pressure can improve the response time or accuracy of the sensor. © 2017, Copyright © Taylor & Francis Group, LLC
  6. Keywords:
  7. Flat polymeric membrane ; Gas sensor ; Nitrogen/carbon dioxide mixture ; Permeability ; Polysulfone ; Binary mixtures ; Carbon dioxide ; Chemical sensors ; Gas detectors ; Gas mixtures ; Gas permeability ; Gases ; Mechanical permeability ; Membranes ; Nitrogen ; Polymeric membranes ; Polymers ; Polysulfones ; Silicones ; Binary gas mixture ; Effect of pressure ; Ideal separation ; Permeability change ; Permeability factor ; Polymeric membrane sensors ; Polymeric sensor ; Silicone rubber ; Gas permeable membranes
  8. Source: Chemical Engineering Communications ; Volume 204, Issue 4 , 2017 , Pages 445-452 ; 00986445 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/00986445.2016.1277519?journalCode=gcec20