Enhancement of gaseous BTEX adsorption on RH-MCM-41 by chlorosilanes
In this research, the surface hydrophobicity of a mesoporous molecular sieve synthesized from rice husk silica, called RH-MCM41 was improved via silylation techniqueto enhance the adsorption efficiency of non-polar volatile organic compound. The effect of chlorosilane leaving on was analyzed with th...
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Universiti Kebangsaan Malaysia
2015
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| Online Access: | http://journalarticle.ukm.my/8486/ http://journalarticle.ukm.my/8486/ http://journalarticle.ukm.my/8486/1/15_T._Areerob.pdf |
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ukm-84862016-12-14T06:47:19Z http://journalarticle.ukm.my/8486/ Enhancement of gaseous BTEX adsorption on RH-MCM-41 by chlorosilanes Areerob, T. Chiarakorn, S. Grisdanurak, N. In this research, the surface hydrophobicity of a mesoporous molecular sieve synthesized from rice husk silica, called RH-MCM41 was improved via silylation techniqueto enhance the adsorption efficiency of non-polar volatile organic compound. The effect of chlorosilane leaving on was analyzed with three silanes containing different numbers of chloride leaving group; trimethylchlorosilane (TMCS), dimethyldichlorosilane (DMDCS) and methyltrichlorosilane (MTCS). The unmodified RH-MCM-41 was soaked in 100 mL of 5% v/v of silane reagent at 30ºC for 24 h. The results showed that the silane loading on the RH-MCM-41 was in the order of increasing number of leaving groups as MTCS > DMDCS > TMCS. The crystallinity results studied by X-ray diffractometry indicated that the silylation did not affect the hexagonal pattern of RH-MCM-41. However, the porosity of the silylated RH-MCM-41 was significantly decreased after silylation, especially by MTCS, due to pore blocking. After silylation, the adsorption performance of gaseous BTEX (benzene, toluene, ethylbenzene and xylene) on the silylated RH-MCM-41 was determined by gas chromatography equipped with flame ionization detector (GC-FID). From the results of humidity effect on adsorbability, the BTEX adsorption capacity of the unsilylated RH-MCM-41 was dropped a half, conversely the BTEX adsorption capacity of all silylated RH-MCM-41 was decreased in range of 20-30% when the relative humidity increased from 25 to 99%. This was indicated that the influence of humidity on the BTEX adsorption was relieved after silylation. In additions, the maximum BTEX adsorption capacity belonged to RH-MCM-41 silylated by TMCS which was recommended for the enhancement of non-polar volatile organic compounds adsorption. Universiti Kebangsaan Malaysia 2015-03 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/8486/1/15_T._Areerob.pdf Areerob, T. and Chiarakorn, S. and Grisdanurak, N. (2015) Enhancement of gaseous BTEX adsorption on RH-MCM-41 by chlorosilanes. Sains Malaysiana, 44 (3). pp. 429-439. ISSN 0126-6039 http://www.ukm.my/jsm/ |
| repository_type |
Digital Repository |
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Local University |
| institution |
Universiti Kebangasaan Malaysia |
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UKM Institutional Repository |
| collection |
Online Access |
| language |
English |
| description |
In this research, the surface hydrophobicity of a mesoporous molecular sieve synthesized from rice husk silica, called RH-MCM41 was improved via silylation techniqueto enhance the adsorption efficiency of non-polar volatile organic compound. The effect of chlorosilane leaving on was analyzed with three silanes containing different numbers of chloride leaving group; trimethylchlorosilane (TMCS), dimethyldichlorosilane (DMDCS) and methyltrichlorosilane (MTCS). The unmodified RH-MCM-41 was soaked in 100 mL of 5% v/v of silane reagent at 30ºC for 24 h. The results showed that the silane loading on the RH-MCM-41 was in the order of increasing number of leaving groups as MTCS > DMDCS > TMCS. The crystallinity results studied by X-ray diffractometry indicated that the silylation did not affect the hexagonal pattern of RH-MCM-41. However, the porosity of the silylated RH-MCM-41 was significantly decreased after silylation, especially by MTCS, due to pore blocking. After silylation, the adsorption performance of gaseous BTEX (benzene, toluene, ethylbenzene and xylene) on the silylated RH-MCM-41 was determined by gas chromatography equipped with flame ionization detector (GC-FID). From the results of humidity effect on adsorbability, the BTEX adsorption capacity of the unsilylated RH-MCM-41 was dropped a half, conversely the BTEX adsorption capacity of all silylated RH-MCM-41 was decreased in range of 20-30% when the relative humidity increased from 25 to 99%. This was indicated that the influence of humidity on the BTEX adsorption was relieved after silylation. In additions, the maximum BTEX adsorption capacity belonged to RH-MCM-41 silylated by TMCS which was recommended for the enhancement of non-polar volatile organic compounds adsorption. |
| format |
Article |
| author |
Areerob, T. Chiarakorn, S. Grisdanurak, N. |
| spellingShingle |
Areerob, T. Chiarakorn, S. Grisdanurak, N. Enhancement of gaseous BTEX adsorption on RH-MCM-41 by chlorosilanes |
| author_facet |
Areerob, T. Chiarakorn, S. Grisdanurak, N. |
| author_sort |
Areerob, T. |
| title |
Enhancement of gaseous BTEX adsorption on RH-MCM-41 by chlorosilanes |
| title_short |
Enhancement of gaseous BTEX adsorption on RH-MCM-41 by chlorosilanes |
| title_full |
Enhancement of gaseous BTEX adsorption on RH-MCM-41 by chlorosilanes |
| title_fullStr |
Enhancement of gaseous BTEX adsorption on RH-MCM-41 by chlorosilanes |
| title_full_unstemmed |
Enhancement of gaseous BTEX adsorption on RH-MCM-41 by chlorosilanes |
| title_sort |
enhancement of gaseous btex adsorption on rh-mcm-41 by chlorosilanes |
| publisher |
Universiti Kebangsaan Malaysia |
| publishDate |
2015 |
| url |
http://journalarticle.ukm.my/8486/ http://journalarticle.ukm.my/8486/ http://journalarticle.ukm.my/8486/1/15_T._Areerob.pdf |
| first_indexed |
2023-09-18T19:52:25Z |
| last_indexed |
2023-09-18T19:52:25Z |
| _version_ |
1777406307945414656 |