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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| Format: | Article |
| Language: | English |
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Universiti Kebangsaan Malaysia
2015
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| Online Access: | http://journalarticle.ukm.my/8486/1/15_T._Areerob.pdf |
| _version_ | 1825726261528363008 |
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| author | Areerob, T. Chiarakorn, S. Grisdanurak, N. |
| author_facet | Areerob, T. Chiarakorn, S. Grisdanurak, N. |
| author_sort | Areerob, T. |
| collection | UKM |
| 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. |
| first_indexed | 2024-03-06T04:08:13Z |
| format | Article |
| id | ukm.eprints-8486 |
| institution | Universiti Kebangsaan Malaysia |
| language | English |
| last_indexed | 2024-03-06T04:08:13Z |
| publishDate | 2015 |
| publisher | Universiti Kebangsaan Malaysia |
| record_format | dspace |
| spelling | ukm.eprints-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/ |
| spellingShingle | Areerob, T. Chiarakorn, S. Grisdanurak, N. Enhancement of gaseous BTEX adsorption on RH-MCM-41 by chlorosilanes |
| title | 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_short | Enhancement of gaseous BTEX adsorption on RH-MCM-41 by chlorosilanes |
| title_sort | enhancement of gaseous btex adsorption on rh mcm 41 by chlorosilanes |
| url | http://journalarticle.ukm.my/8486/1/15_T._Areerob.pdf |
| work_keys_str_mv | AT areerobt enhancementofgaseousbtexadsorptiononrhmcm41bychlorosilanes AT chiarakorns enhancementofgaseousbtexadsorptiononrhmcm41bychlorosilanes AT grisdanurakn enhancementofgaseousbtexadsorptiononrhmcm41bychlorosilanes |