Optimization and Modification of the Nanostructures Adsorbent for Reduction voc in Flue Gas (Benzene, Toluene, Xylene, Ethyl Benzene)

Azaribeni, Adel | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47810 (06)
  4. University: Sharif University of Technology
  5. Department: Transport Phenomena and Processes Separation
  6. Advisor(s): Sayf Kordi, Ali Akbar; Mahdyarfar, Mohammad; Tasharrofi, Saiedeh
  7. Abstract:
  8. In this study, In order to reduce volatile organic component (benzene, toluene, xylene and ethyl benzene) some appropriate nanostructures were used. First the appropriate nano structures were identified, then modified and optimized and finally characterized by XRD, SEM, ASAP. Appropriate nano adsorbent such as nano active carbon, single wall and multi wall nano carbon tubs , nano fiber carbon, graphene oxide, aluminum oxide particles, nano-zinc oxide , titanium oxide particles, 13x zeolite and extruded nano carbon tubes, were prepared and optimized, than evaluated from perspective of the crystal structure, surface area and porosity. nano active carbon, single wall and multi wall nano carbon tubs , nano fiber carbon were prepared from nano and carbon division of Research Institute of Petroleum Industry (RIPI) and then emancipated. Graphene oxide adsorbent was synthesized base on hammers method. Zinc oxide powder based on Habibi and et al paper was synthesized. In order to evaluate amount of VOC adsorption by nano adsorbents, a dynamic adsorption system was used. The mixture of air and VOC (ethyl benzene) with concentration of 100, 250, 500 and 1000 ppm and flow rate of 1025, 1525 and 2025 mL/min passed through an adsorption column with 2.5 cm in diameter at room temperature and atmospheric pressure. Breakthrough curves were drown based on outlet concentration versus time for each adsorbent. The Results show active carbon with 1322.26 m2/gr surface area is the best adsorbent among the other adsorbents. Hybrid of Activated carbon- titanium oxide was synthesized by impregnation method. The results show because of nano particles occupation in adsorbents pores, the pore volume and surface area of adsorbents reduced. The Ethyl benzene adsorption on active carbon-20 wt % titanium oxide hybrid (578.1 m2/gr surface area) in comparison with active carbon, reduced by one fifth. Ethyl benzene adsorption isotherm for each adsorbent were modeled by Longmuir adsorption model and Longmuir adsorption model parameter were determined by experimental results
  9. Keywords:
  10. Nanoadsorbent ; Adsorption ; Optimization ; Improvement ; Volatile Organic Compound (VOC)

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