• Design and fabrication of an automated thermal desorption gas-solid reaction system: Oxidation of ammonia and methanol over YBa2Cu3O7−δ(123) oxide systems

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    • Keywords


      Temperature programmed desorption; temperature programmed reaction; evolved gas analysis; ammonia oxidation; methanol oxidation; YBa2Cu3O7−δ (123) oxides

    • Abstract


      A fully automated, versatile Temperature Programmed Desorption (TDP), Temperature Programmed Reaction (TPR) and Evolved Gas Analysis (EGA) system has been designed and fabricated. The system consists of a micro-reactor which can be evacuated to 10−6 torr and can be heated from 30 to 750°C at a rate of 5 to 30°C per minute. The gas evolved from the reactor is analysed by a quadrupole mass spectrometer (1–300 amu). Data on each of the mass scans and the temperature at a given time are acquired by a PC/AT system to generate thermograms. The functioning of the system is exemplified by the temperature programmed desorption (TPD) of oxygen from YBa2Cu3−xCoxO7 ± δ, catalytic ammonia oxidation to NO over YBa2Cu3O7−δ and anaerobic oxidation of methanol to CO2, CO and H2O over YBa2Cu3O7−δ (Y123) and PrBa2Cu3O7−δ (Pr123) systems.

    • Author Affiliations


      M S Hegde1 S Ramesh1 G S Ramesh1

      1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore - 560012, India
    • Dates

  • Journal of Chemical Sciences | News

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