Mild modification method for the generation of mesoporosity in synthetic and natural mordenite
Zeolites are widely used as acid catalysts for the synthesis of fine chemicals in industrial processes. However, in most cases, diffusion limitations in the microporous network of zeolites prevents a good catalytic performance. In this sense, in the course of our research we have modified synthetic...
Ausführliche Beschreibung
Autor*in: |
W. Mamo [verfasserIn] Y. Awoke [verfasserIn] Y. Chebude [verfasserIn] I. Diaz [verfasserIn] |
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Englisch |
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2015 |
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In: Bulletin of the Chemical Society of Ethiopia - Chemical Society of Ethiopia, 2017, 29(2015), 1, Seite 95-103 |
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Übergeordnetes Werk: |
volume:29 ; year:2015 ; number:1 ; pages:95-103 |
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DOAJ05843626X |
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(DE-627)DOAJ05843626X (DE-599)DOAJff89a738874548679a17837ea47e080f DE-627 ger DE-627 rakwb eng QD1-999 W. Mamo verfasserin aut Mild modification method for the generation of mesoporosity in synthetic and natural mordenite 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Zeolites are widely used as acid catalysts for the synthesis of fine chemicals in industrial processes. However, in most cases, diffusion limitations in the microporous network of zeolites prevents a good catalytic performance. In this sense, in the course of our research we have modified synthetic and natural mordenite zeolites by mild dealumination/desilication process to obtain mesoporosity. Commercial mordenite (CBV21A Si/Al = 10.5), and natural mordenite from Ethiopia (Si/Al = 6.2) have been treated under mild conditions (pH = 6) in order to maintain high crystallinity in the final zeolites. The impact of this mild treatment (based on ammonium acetate) is remarkable in the synthetic mordenite, creating good degree of mesoporosity while maintaining the bulk Si/Al ratio and crystallinity of the sample. In the case of the natural mordenite, the treatment leads to strong increase in the crystallinity of the sample, although only small mesoporosity is created. All samples were characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES), N2 adsorption-desorption isotherms and transmission electron microscopy (TEM). DOI: http://dx.doi.org/10.4314/bcse.v29i1.8 Zeolites Mordenite Natural mordenite Modification Mesoporous zeolites Chemistry Y. Awoke verfasserin aut Y. Chebude verfasserin aut I. Diaz verfasserin aut In Bulletin of the Chemical Society of Ethiopia Chemical Society of Ethiopia, 2017 29(2015), 1, Seite 95-103 (DE-627)358952549 (DE-600)2097332-9 1726801X nnns volume:29 year:2015 number:1 pages:95-103 http://dx.doi.org/10.4314/bcse.v29i1.8 kostenfrei https://doaj.org/article/ff89a738874548679a17837ea47e080f kostenfrei http://www.ajol.info/index.php/bcse/article/view/111472 kostenfrei https://doaj.org/toc/1011-3924 Journal toc kostenfrei https://doaj.org/toc/1726-801X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 29 2015 1 95-103 |
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(DE-627)DOAJ05843626X (DE-599)DOAJff89a738874548679a17837ea47e080f DE-627 ger DE-627 rakwb eng QD1-999 W. Mamo verfasserin aut Mild modification method for the generation of mesoporosity in synthetic and natural mordenite 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Zeolites are widely used as acid catalysts for the synthesis of fine chemicals in industrial processes. However, in most cases, diffusion limitations in the microporous network of zeolites prevents a good catalytic performance. In this sense, in the course of our research we have modified synthetic and natural mordenite zeolites by mild dealumination/desilication process to obtain mesoporosity. Commercial mordenite (CBV21A Si/Al = 10.5), and natural mordenite from Ethiopia (Si/Al = 6.2) have been treated under mild conditions (pH = 6) in order to maintain high crystallinity in the final zeolites. The impact of this mild treatment (based on ammonium acetate) is remarkable in the synthetic mordenite, creating good degree of mesoporosity while maintaining the bulk Si/Al ratio and crystallinity of the sample. In the case of the natural mordenite, the treatment leads to strong increase in the crystallinity of the sample, although only small mesoporosity is created. All samples were characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES), N2 adsorption-desorption isotherms and transmission electron microscopy (TEM). DOI: http://dx.doi.org/10.4314/bcse.v29i1.8 Zeolites Mordenite Natural mordenite Modification Mesoporous zeolites Chemistry Y. Awoke verfasserin aut Y. Chebude verfasserin aut I. Diaz verfasserin aut In Bulletin of the Chemical Society of Ethiopia Chemical Society of Ethiopia, 2017 29(2015), 1, Seite 95-103 (DE-627)358952549 (DE-600)2097332-9 1726801X nnns volume:29 year:2015 number:1 pages:95-103 http://dx.doi.org/10.4314/bcse.v29i1.8 kostenfrei https://doaj.org/article/ff89a738874548679a17837ea47e080f kostenfrei http://www.ajol.info/index.php/bcse/article/view/111472 kostenfrei https://doaj.org/toc/1011-3924 Journal toc kostenfrei https://doaj.org/toc/1726-801X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 29 2015 1 95-103 |
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(DE-627)DOAJ05843626X (DE-599)DOAJff89a738874548679a17837ea47e080f DE-627 ger DE-627 rakwb eng QD1-999 W. Mamo verfasserin aut Mild modification method for the generation of mesoporosity in synthetic and natural mordenite 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Zeolites are widely used as acid catalysts for the synthesis of fine chemicals in industrial processes. However, in most cases, diffusion limitations in the microporous network of zeolites prevents a good catalytic performance. In this sense, in the course of our research we have modified synthetic and natural mordenite zeolites by mild dealumination/desilication process to obtain mesoporosity. Commercial mordenite (CBV21A Si/Al = 10.5), and natural mordenite from Ethiopia (Si/Al = 6.2) have been treated under mild conditions (pH = 6) in order to maintain high crystallinity in the final zeolites. The impact of this mild treatment (based on ammonium acetate) is remarkable in the synthetic mordenite, creating good degree of mesoporosity while maintaining the bulk Si/Al ratio and crystallinity of the sample. In the case of the natural mordenite, the treatment leads to strong increase in the crystallinity of the sample, although only small mesoporosity is created. All samples were characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES), N2 adsorption-desorption isotherms and transmission electron microscopy (TEM). DOI: http://dx.doi.org/10.4314/bcse.v29i1.8 Zeolites Mordenite Natural mordenite Modification Mesoporous zeolites Chemistry Y. Awoke verfasserin aut Y. Chebude verfasserin aut I. Diaz verfasserin aut In Bulletin of the Chemical Society of Ethiopia Chemical Society of Ethiopia, 2017 29(2015), 1, Seite 95-103 (DE-627)358952549 (DE-600)2097332-9 1726801X nnns volume:29 year:2015 number:1 pages:95-103 http://dx.doi.org/10.4314/bcse.v29i1.8 kostenfrei https://doaj.org/article/ff89a738874548679a17837ea47e080f kostenfrei http://www.ajol.info/index.php/bcse/article/view/111472 kostenfrei https://doaj.org/toc/1011-3924 Journal toc kostenfrei https://doaj.org/toc/1726-801X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 29 2015 1 95-103 |
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(DE-627)DOAJ05843626X (DE-599)DOAJff89a738874548679a17837ea47e080f DE-627 ger DE-627 rakwb eng QD1-999 W. Mamo verfasserin aut Mild modification method for the generation of mesoporosity in synthetic and natural mordenite 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Zeolites are widely used as acid catalysts for the synthesis of fine chemicals in industrial processes. However, in most cases, diffusion limitations in the microporous network of zeolites prevents a good catalytic performance. In this sense, in the course of our research we have modified synthetic and natural mordenite zeolites by mild dealumination/desilication process to obtain mesoporosity. Commercial mordenite (CBV21A Si/Al = 10.5), and natural mordenite from Ethiopia (Si/Al = 6.2) have been treated under mild conditions (pH = 6) in order to maintain high crystallinity in the final zeolites. The impact of this mild treatment (based on ammonium acetate) is remarkable in the synthetic mordenite, creating good degree of mesoporosity while maintaining the bulk Si/Al ratio and crystallinity of the sample. In the case of the natural mordenite, the treatment leads to strong increase in the crystallinity of the sample, although only small mesoporosity is created. All samples were characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES), N2 adsorption-desorption isotherms and transmission electron microscopy (TEM). DOI: http://dx.doi.org/10.4314/bcse.v29i1.8 Zeolites Mordenite Natural mordenite Modification Mesoporous zeolites Chemistry Y. Awoke verfasserin aut Y. Chebude verfasserin aut I. Diaz verfasserin aut In Bulletin of the Chemical Society of Ethiopia Chemical Society of Ethiopia, 2017 29(2015), 1, Seite 95-103 (DE-627)358952549 (DE-600)2097332-9 1726801X nnns volume:29 year:2015 number:1 pages:95-103 http://dx.doi.org/10.4314/bcse.v29i1.8 kostenfrei https://doaj.org/article/ff89a738874548679a17837ea47e080f kostenfrei http://www.ajol.info/index.php/bcse/article/view/111472 kostenfrei https://doaj.org/toc/1011-3924 Journal toc kostenfrei https://doaj.org/toc/1726-801X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 29 2015 1 95-103 |
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(DE-627)DOAJ05843626X (DE-599)DOAJff89a738874548679a17837ea47e080f DE-627 ger DE-627 rakwb eng QD1-999 W. Mamo verfasserin aut Mild modification method for the generation of mesoporosity in synthetic and natural mordenite 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Zeolites are widely used as acid catalysts for the synthesis of fine chemicals in industrial processes. However, in most cases, diffusion limitations in the microporous network of zeolites prevents a good catalytic performance. In this sense, in the course of our research we have modified synthetic and natural mordenite zeolites by mild dealumination/desilication process to obtain mesoporosity. Commercial mordenite (CBV21A Si/Al = 10.5), and natural mordenite from Ethiopia (Si/Al = 6.2) have been treated under mild conditions (pH = 6) in order to maintain high crystallinity in the final zeolites. The impact of this mild treatment (based on ammonium acetate) is remarkable in the synthetic mordenite, creating good degree of mesoporosity while maintaining the bulk Si/Al ratio and crystallinity of the sample. In the case of the natural mordenite, the treatment leads to strong increase in the crystallinity of the sample, although only small mesoporosity is created. All samples were characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES), N2 adsorption-desorption isotherms and transmission electron microscopy (TEM). DOI: http://dx.doi.org/10.4314/bcse.v29i1.8 Zeolites Mordenite Natural mordenite Modification Mesoporous zeolites Chemistry Y. Awoke verfasserin aut Y. Chebude verfasserin aut I. Diaz verfasserin aut In Bulletin of the Chemical Society of Ethiopia Chemical Society of Ethiopia, 2017 29(2015), 1, Seite 95-103 (DE-627)358952549 (DE-600)2097332-9 1726801X nnns volume:29 year:2015 number:1 pages:95-103 http://dx.doi.org/10.4314/bcse.v29i1.8 kostenfrei https://doaj.org/article/ff89a738874548679a17837ea47e080f kostenfrei http://www.ajol.info/index.php/bcse/article/view/111472 kostenfrei https://doaj.org/toc/1011-3924 Journal toc kostenfrei https://doaj.org/toc/1726-801X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 29 2015 1 95-103 |
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Zeolites are widely used as acid catalysts for the synthesis of fine chemicals in industrial processes. However, in most cases, diffusion limitations in the microporous network of zeolites prevents a good catalytic performance. In this sense, in the course of our research we have modified synthetic and natural mordenite zeolites by mild dealumination/desilication process to obtain mesoporosity. Commercial mordenite (CBV21A Si/Al = 10.5), and natural mordenite from Ethiopia (Si/Al = 6.2) have been treated under mild conditions (pH = 6) in order to maintain high crystallinity in the final zeolites. The impact of this mild treatment (based on ammonium acetate) is remarkable in the synthetic mordenite, creating good degree of mesoporosity while maintaining the bulk Si/Al ratio and crystallinity of the sample. In the case of the natural mordenite, the treatment leads to strong increase in the crystallinity of the sample, although only small mesoporosity is created. All samples were characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES), N2 adsorption-desorption isotherms and transmission electron microscopy (TEM). DOI: http://dx.doi.org/10.4314/bcse.v29i1.8 |
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Zeolites are widely used as acid catalysts for the synthesis of fine chemicals in industrial processes. However, in most cases, diffusion limitations in the microporous network of zeolites prevents a good catalytic performance. In this sense, in the course of our research we have modified synthetic and natural mordenite zeolites by mild dealumination/desilication process to obtain mesoporosity. Commercial mordenite (CBV21A Si/Al = 10.5), and natural mordenite from Ethiopia (Si/Al = 6.2) have been treated under mild conditions (pH = 6) in order to maintain high crystallinity in the final zeolites. The impact of this mild treatment (based on ammonium acetate) is remarkable in the synthetic mordenite, creating good degree of mesoporosity while maintaining the bulk Si/Al ratio and crystallinity of the sample. In the case of the natural mordenite, the treatment leads to strong increase in the crystallinity of the sample, although only small mesoporosity is created. All samples were characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES), N2 adsorption-desorption isotherms and transmission electron microscopy (TEM). DOI: http://dx.doi.org/10.4314/bcse.v29i1.8 |
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Zeolites are widely used as acid catalysts for the synthesis of fine chemicals in industrial processes. However, in most cases, diffusion limitations in the microporous network of zeolites prevents a good catalytic performance. In this sense, in the course of our research we have modified synthetic and natural mordenite zeolites by mild dealumination/desilication process to obtain mesoporosity. Commercial mordenite (CBV21A Si/Al = 10.5), and natural mordenite from Ethiopia (Si/Al = 6.2) have been treated under mild conditions (pH = 6) in order to maintain high crystallinity in the final zeolites. The impact of this mild treatment (based on ammonium acetate) is remarkable in the synthetic mordenite, creating good degree of mesoporosity while maintaining the bulk Si/Al ratio and crystallinity of the sample. In the case of the natural mordenite, the treatment leads to strong increase in the crystallinity of the sample, although only small mesoporosity is created. All samples were characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES), N2 adsorption-desorption isotherms and transmission electron microscopy (TEM). DOI: http://dx.doi.org/10.4314/bcse.v29i1.8 |
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