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Design and Construction the Low Cost Catalyst for Removal of VOCs from Air

Fahimirad, Mahdi | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44152 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Shaygan Salek, Jalaloddin
  7. Abstract:
  8. Nowadays, increased pollutants in the air threat the society health condition and Volatile Organic Compounds (VOCs) are the most hazardous ones among them. In the present study, catalytic oxidation as a prominent of the VOCs removal method from air, have attracted attentions due to high removal efficiency and suitable kinetic reaction. Because of its common industrial applications, toluene is intended to be eliminated through a low cost carbon supported catalyst which is synthesised in the laboratory. Construction method, carbonaceous support type, catalyst metal and its load, calcination temperature and time are among influencing design characteristics. A combination of Impregnation and Deposition Precipitation (DP) methods is used to synthesis catalyst on a carbonaceous support for the first time ever. By reactor analysis, BET (860.7m2/g) and Boehm tests the activated carbon which prepared from hard almond shell is selected among Apricot, Walnut and Norit activated carbons.Copper, iron, cobalt and nickel are used as the catalyst metal on the activated carbon support due to cheapness and suitable performance. Calcination time of 3 hours, temperature in the 300-500°C range and 1-15 %wt metal loading is considered to design experiments by Design Expert software (Response Surface Method). Performing XRD, SEM, BET and ANOVA tests for copper case, indicated that the removal efficiency is enhanced by increasing metal loading on the support. However, its sensitivity to temperature also increases as the appropriate temperature is higher than 400 °C for high loadings. In other metal cases, 500 °C is the most suitable temperature for calcination. Copper catalyst has better removal efficiency as high as 99.8% and iron is the second best one. Meanwhile, ANOVA statistical method confirms the reactor analysis results for transition metals and the low cost carbonaceous support
  9. Keywords:
  10. Activated Carbon ; Toluene ; Transition Metals ; Volatile Organic Compound (VOC) ; Catalytic Oxidation ; Catalyst

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