Process modeling of NH3 contaminated waste air treatment in photocatalytic reactor using TiO2 coated glass tubes
Ammonia (NH3) is a noxious gas that can cause serious damage to human health and to the environment. Thus, elimination of NH3 in waste air by treating before releasing to the atmosphere is necessary. In this study, titanium dioxide (TiO2) nanoparticle Degussa P25 coating on glass cylindrical tube su...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Prince of Songkla University
2013-06-01
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| Series: | Songklanakarin Journal of Science and Technology (SJST) |
| Subjects: | |
| Online Access: | http://rdo.psu.ac.th/sjstweb/journal/35-3/35-3-361.pdf |
| _version_ | 1818319962899480576 |
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| author | Prukraya Pongyeela Juntima Chungsiriporn Pornsiri Kaewpradit Lek Sikong |
| author_facet | Prukraya Pongyeela Juntima Chungsiriporn Pornsiri Kaewpradit Lek Sikong |
| author_sort | Prukraya Pongyeela |
| collection | DOAJ |
| description | Ammonia (NH3) is a noxious gas that can cause serious damage to human health and to the environment. Thus, elimination of NH3 in waste air by treating before releasing to the atmosphere is necessary. In this study, titanium dioxide (TiO2) nanoparticle Degussa P25 coating on glass cylindrical tube supporters was synthesized and used as photocatalytic in a continuous photoreactor device. UV light source was vertically installed around the photoreactor in a stainless steel chamber. Experiments were designed and conducted based on central composite design (CCD) and analyzed using response surface methodology (RSM). This RSM was used to evaluate the effects of process variables and their interactions towards attainment of their optimum conditions. Three significant variables, light intensity (23-114W/m2), waste air flow rate (1-5 l/min), and TiO2 loading (1.18-5.90 g) were fitted in a quadratic model to the response of NH3 treatment efficiency. R2 of 0.9783 wassatisfactorily evaluated for correlation coefficient of the quadratic model on the photocatalytic reactor. Based on statisticalanalysis, the NH3 treatment model has been proven to be highly significant with very low probability values (<0.0001). The optimum conditions obtained were 114 W/m2 in light intensity, 1 l/min waste air flow rate, and 5.90 g TiO2 loading. This resulted in 91.45% treatment of NH3 at 300 ppmv as obtained from the predicted model, which fitted well with the laboratory results (90.02%). According to the study, TiO2 coated on glass tube supporter can effectively be used for the treatment of NH3 from waste air and could possibly be applied at an industrial scale. |
| first_indexed | 2024-12-13T10:17:27Z |
| format | Article |
| id | doaj.art-4247f652449c41e3a27633bdc5f17eea |
| institution | Directory Open Access Journal |
| issn | 0125-3395 |
| language | English |
| last_indexed | 2024-12-13T10:17:27Z |
| publishDate | 2013-06-01 |
| publisher | Prince of Songkla University |
| record_format | Article |
| series | Songklanakarin Journal of Science and Technology (SJST) |
| spelling | doaj.art-4247f652449c41e3a27633bdc5f17eea2022-12-21T23:51:16ZengPrince of Songkla UniversitySongklanakarin Journal of Science and Technology (SJST)0125-33952013-06-01353361368Process modeling of NH3 contaminated waste air treatment in photocatalytic reactor using TiO2 coated glass tubesPrukraya PongyeelaJuntima ChungsiripornPornsiri KaewpraditLek SikongAmmonia (NH3) is a noxious gas that can cause serious damage to human health and to the environment. Thus, elimination of NH3 in waste air by treating before releasing to the atmosphere is necessary. In this study, titanium dioxide (TiO2) nanoparticle Degussa P25 coating on glass cylindrical tube supporters was synthesized and used as photocatalytic in a continuous photoreactor device. UV light source was vertically installed around the photoreactor in a stainless steel chamber. Experiments were designed and conducted based on central composite design (CCD) and analyzed using response surface methodology (RSM). This RSM was used to evaluate the effects of process variables and their interactions towards attainment of their optimum conditions. Three significant variables, light intensity (23-114W/m2), waste air flow rate (1-5 l/min), and TiO2 loading (1.18-5.90 g) were fitted in a quadratic model to the response of NH3 treatment efficiency. R2 of 0.9783 wassatisfactorily evaluated for correlation coefficient of the quadratic model on the photocatalytic reactor. Based on statisticalanalysis, the NH3 treatment model has been proven to be highly significant with very low probability values (<0.0001). The optimum conditions obtained were 114 W/m2 in light intensity, 1 l/min waste air flow rate, and 5.90 g TiO2 loading. This resulted in 91.45% treatment of NH3 at 300 ppmv as obtained from the predicted model, which fitted well with the laboratory results (90.02%). According to the study, TiO2 coated on glass tube supporter can effectively be used for the treatment of NH3 from waste air and could possibly be applied at an industrial scale.http://rdo.psu.ac.th/sjstweb/journal/35-3/35-3-361.pdfRSMammoniaphotocatalyticTiO2UV light |
| spellingShingle | Prukraya Pongyeela Juntima Chungsiriporn Pornsiri Kaewpradit Lek Sikong Process modeling of NH3 contaminated waste air treatment in photocatalytic reactor using TiO2 coated glass tubes Songklanakarin Journal of Science and Technology (SJST) RSM ammonia photocatalytic TiO2 UV light |
| title | Process modeling of NH3 contaminated waste air treatment in photocatalytic reactor using TiO2 coated glass tubes |
| title_full | Process modeling of NH3 contaminated waste air treatment in photocatalytic reactor using TiO2 coated glass tubes |
| title_fullStr | Process modeling of NH3 contaminated waste air treatment in photocatalytic reactor using TiO2 coated glass tubes |
| title_full_unstemmed | Process modeling of NH3 contaminated waste air treatment in photocatalytic reactor using TiO2 coated glass tubes |
| title_short | Process modeling of NH3 contaminated waste air treatment in photocatalytic reactor using TiO2 coated glass tubes |
| title_sort | process modeling of nh3 contaminated waste air treatment in photocatalytic reactor using tio2 coated glass tubes |
| topic | RSM ammonia photocatalytic TiO2 UV light |
| url | http://rdo.psu.ac.th/sjstweb/journal/35-3/35-3-361.pdf |
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