The Role of Non-Framework Lewis Acidic Al Species of Alkali-Treated HZSM-5 in Methanol Aromatization
Mesoporous HZSM-5 prepared by alkaline treatment (also termed desilication) has drawn significant attention due to its potential in large-scale production and in versatile applications, such as separation and catalysis. Alkali-treated HZSM-5 contains considerable amounts of non-framework (amorphous)...
Gespeichert in:
| Veröffentlicht in: | Catalysts 2017-09, Vol.7 (9), p.259 |
|---|---|
| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | |
|---|---|
| container_issue | 9 |
| container_start_page | 259 |
| container_title | Catalysts |
| container_volume | 7 |
| creator | Lai, Po-Chen Hsieh, Chi-Ying Chen, Chao-Huang Lin, Yu-Chuan |
| description | Mesoporous HZSM-5 prepared by alkaline treatment (also termed desilication) has drawn significant attention due to its potential in large-scale production and in versatile applications, such as separation and catalysis. Alkali-treated HZSM-5 contains considerable amounts of non-framework (amorphous) Lewis acidic Al species on the external surface, and is deemed to be essential in affecting its catalytic performances. This study intends to clarify the catalytic nature of amorphous Al species of alkali-treated HZSM-5 in methanol aromatization. Physicochemical characterizations, including N2 adsorption, scanning electron microscopy (SEM), X-ray diffraction (XRD), magic-angle-spinning nuclear magnetic resonance (MAS NMR), inductively coupled plasma (ICP) analysis, NH3 temperature-programmed desorption (TPD), and methanol-TPD, were performed. The outcomes showed that non-framework Al promotes the hydride transfer in mesoporous HZSM-5, thereby facilitating the aromatization reaction. Among aromatic products, durene can be promoted by non-framework Al through methylation/transalkylation of other aromatics, particularly xylenes, instead of being promoted by reduced space confinement in mesoporous HZSM-5. |
| doi_str_mv | 10.3390/catal7090259 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_1952148901</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>1952148901</sourcerecordid><originalsourceid>FETCH-LOGICAL-c301t-7d0bb14cdf023e1dbc9a054ff8d5361ce362ee61325cd43c9b07d22798703213</originalsourceid><addsrcrecordid>eNpNkE1LAzEQhoMoWGpv_oCAV6P57G6OS7FWaBXsnrws2WSWpt1uarKl6K-3pR468DLv4WEGHoTuGX0SQtNna3rTZlRTrvQVGnCaCSKFlNcX_RaNUlrT42gmcqYGyJUrwJ-hBRwa_B46Mo1mC4cQN3gOB59wYb3zFhctXu7AekgnsGg3pvWkjGB6cHj2tVwQhX2HF9CvTBdaXMSwNb3_PSZ0d-imMW2C0f8eonL6Uk5mZP7x-jYp5sQKynqSOVrXTFrXUC6AudpqQ5VsmtwpMWYWxJgDjJngyjoprK5p5jjPdJ5RwZkYoofz2V0M33tIfbUO-9gdP1ZMK85krumJejxTNoaUIjTVLvqtiT8Vo9XJZHVpUvwBVmFlDQ</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1952148901</pqid></control><display><type>article</type><title>The Role of Non-Framework Lewis Acidic Al Species of Alkali-Treated HZSM-5 in Methanol Aromatization</title><source>MDPI - Multidisciplinary Digital Publishing Institute</source><source>Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals</source><creator>Lai, Po-Chen ; Hsieh, Chi-Ying ; Chen, Chao-Huang ; Lin, Yu-Chuan</creator><creatorcontrib>Lai, Po-Chen ; Hsieh, Chi-Ying ; Chen, Chao-Huang ; Lin, Yu-Chuan</creatorcontrib><description>Mesoporous HZSM-5 prepared by alkaline treatment (also termed desilication) has drawn significant attention due to its potential in large-scale production and in versatile applications, such as separation and catalysis. Alkali-treated HZSM-5 contains considerable amounts of non-framework (amorphous) Lewis acidic Al species on the external surface, and is deemed to be essential in affecting its catalytic performances. This study intends to clarify the catalytic nature of amorphous Al species of alkali-treated HZSM-5 in methanol aromatization. Physicochemical characterizations, including N2 adsorption, scanning electron microscopy (SEM), X-ray diffraction (XRD), magic-angle-spinning nuclear magnetic resonance (MAS NMR), inductively coupled plasma (ICP) analysis, NH3 temperature-programmed desorption (TPD), and methanol-TPD, were performed. The outcomes showed that non-framework Al promotes the hydride transfer in mesoporous HZSM-5, thereby facilitating the aromatization reaction. Among aromatic products, durene can be promoted by non-framework Al through methylation/transalkylation of other aromatics, particularly xylenes, instead of being promoted by reduced space confinement in mesoporous HZSM-5.</description><identifier>ISSN: 2073-4344</identifier><identifier>EISSN: 2073-4344</identifier><identifier>DOI: 10.3390/catal7090259</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Catalysis ; Catalysts ; Chemical reactions ; Durene ; Inductively coupled plasma ; Methanol ; Methylation ; NMR ; NMR spectroscopy ; Nuclear magnetic resonance ; Tempering ; Transalkylation ; X-ray diffraction</subject><ispartof>Catalysts, 2017-09, Vol.7 (9), p.259</ispartof><rights>Copyright MDPI AG 2017</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c301t-7d0bb14cdf023e1dbc9a054ff8d5361ce362ee61325cd43c9b07d22798703213</citedby><cites>FETCH-LOGICAL-c301t-7d0bb14cdf023e1dbc9a054ff8d5361ce362ee61325cd43c9b07d22798703213</cites><orcidid>0000-0002-2229-6354</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Lai, Po-Chen</creatorcontrib><creatorcontrib>Hsieh, Chi-Ying</creatorcontrib><creatorcontrib>Chen, Chao-Huang</creatorcontrib><creatorcontrib>Lin, Yu-Chuan</creatorcontrib><title>The Role of Non-Framework Lewis Acidic Al Species of Alkali-Treated HZSM-5 in Methanol Aromatization</title><title>Catalysts</title><description>Mesoporous HZSM-5 prepared by alkaline treatment (also termed desilication) has drawn significant attention due to its potential in large-scale production and in versatile applications, such as separation and catalysis. Alkali-treated HZSM-5 contains considerable amounts of non-framework (amorphous) Lewis acidic Al species on the external surface, and is deemed to be essential in affecting its catalytic performances. This study intends to clarify the catalytic nature of amorphous Al species of alkali-treated HZSM-5 in methanol aromatization. Physicochemical characterizations, including N2 adsorption, scanning electron microscopy (SEM), X-ray diffraction (XRD), magic-angle-spinning nuclear magnetic resonance (MAS NMR), inductively coupled plasma (ICP) analysis, NH3 temperature-programmed desorption (TPD), and methanol-TPD, were performed. The outcomes showed that non-framework Al promotes the hydride transfer in mesoporous HZSM-5, thereby facilitating the aromatization reaction. Among aromatic products, durene can be promoted by non-framework Al through methylation/transalkylation of other aromatics, particularly xylenes, instead of being promoted by reduced space confinement in mesoporous HZSM-5.</description><subject>Catalysis</subject><subject>Catalysts</subject><subject>Chemical reactions</subject><subject>Durene</subject><subject>Inductively coupled plasma</subject><subject>Methanol</subject><subject>Methylation</subject><subject>NMR</subject><subject>NMR spectroscopy</subject><subject>Nuclear magnetic resonance</subject><subject>Tempering</subject><subject>Transalkylation</subject><subject>X-ray diffraction</subject><issn>2073-4344</issn><issn>2073-4344</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNpNkE1LAzEQhoMoWGpv_oCAV6P57G6OS7FWaBXsnrws2WSWpt1uarKl6K-3pR468DLv4WEGHoTuGX0SQtNna3rTZlRTrvQVGnCaCSKFlNcX_RaNUlrT42gmcqYGyJUrwJ-hBRwa_B46Mo1mC4cQN3gOB59wYb3zFhctXu7AekgnsGg3pvWkjGB6cHj2tVwQhX2HF9CvTBdaXMSwNb3_PSZ0d-imMW2C0f8eonL6Uk5mZP7x-jYp5sQKynqSOVrXTFrXUC6AudpqQ5VsmtwpMWYWxJgDjJngyjoprK5p5jjPdJ5RwZkYoofz2V0M33tIfbUO-9gdP1ZMK85krumJejxTNoaUIjTVLvqtiT8Vo9XJZHVpUvwBVmFlDQ</recordid><startdate>20170901</startdate><enddate>20170901</enddate><creator>Lai, Po-Chen</creator><creator>Hsieh, Chi-Ying</creator><creator>Chen, Chao-Huang</creator><creator>Lin, Yu-Chuan</creator><general>MDPI AG</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><orcidid>https://orcid.org/0000-0002-2229-6354</orcidid></search><sort><creationdate>20170901</creationdate><title>The Role of Non-Framework Lewis Acidic Al Species of Alkali-Treated HZSM-5 in Methanol Aromatization</title><author>Lai, Po-Chen ; Hsieh, Chi-Ying ; Chen, Chao-Huang ; Lin, Yu-Chuan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c301t-7d0bb14cdf023e1dbc9a054ff8d5361ce362ee61325cd43c9b07d22798703213</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Catalysis</topic><topic>Catalysts</topic><topic>Chemical reactions</topic><topic>Durene</topic><topic>Inductively coupled plasma</topic><topic>Methanol</topic><topic>Methylation</topic><topic>NMR</topic><topic>NMR spectroscopy</topic><topic>Nuclear magnetic resonance</topic><topic>Tempering</topic><topic>Transalkylation</topic><topic>X-ray diffraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lai, Po-Chen</creatorcontrib><creatorcontrib>Hsieh, Chi-Ying</creatorcontrib><creatorcontrib>Chen, Chao-Huang</creatorcontrib><creatorcontrib>Lin, Yu-Chuan</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><jtitle>Catalysts</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lai, Po-Chen</au><au>Hsieh, Chi-Ying</au><au>Chen, Chao-Huang</au><au>Lin, Yu-Chuan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Role of Non-Framework Lewis Acidic Al Species of Alkali-Treated HZSM-5 in Methanol Aromatization</atitle><jtitle>Catalysts</jtitle><date>2017-09-01</date><risdate>2017</risdate><volume>7</volume><issue>9</issue><spage>259</spage><pages>259-</pages><issn>2073-4344</issn><eissn>2073-4344</eissn><abstract>Mesoporous HZSM-5 prepared by alkaline treatment (also termed desilication) has drawn significant attention due to its potential in large-scale production and in versatile applications, such as separation and catalysis. Alkali-treated HZSM-5 contains considerable amounts of non-framework (amorphous) Lewis acidic Al species on the external surface, and is deemed to be essential in affecting its catalytic performances. This study intends to clarify the catalytic nature of amorphous Al species of alkali-treated HZSM-5 in methanol aromatization. Physicochemical characterizations, including N2 adsorption, scanning electron microscopy (SEM), X-ray diffraction (XRD), magic-angle-spinning nuclear magnetic resonance (MAS NMR), inductively coupled plasma (ICP) analysis, NH3 temperature-programmed desorption (TPD), and methanol-TPD, were performed. The outcomes showed that non-framework Al promotes the hydride transfer in mesoporous HZSM-5, thereby facilitating the aromatization reaction. Among aromatic products, durene can be promoted by non-framework Al through methylation/transalkylation of other aromatics, particularly xylenes, instead of being promoted by reduced space confinement in mesoporous HZSM-5.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/catal7090259</doi><orcidid>https://orcid.org/0000-0002-2229-6354</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 2073-4344 |
| ispartof | Catalysts, 2017-09, Vol.7 (9), p.259 |
| issn | 2073-4344 2073-4344 |
| language | eng |
| recordid | cdi_proquest_journals_1952148901 |
| source | MDPI - Multidisciplinary Digital Publishing Institute; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Catalysis Catalysts Chemical reactions Durene Inductively coupled plasma Methanol Methylation NMR NMR spectroscopy Nuclear magnetic resonance Tempering Transalkylation X-ray diffraction |
| title | The Role of Non-Framework Lewis Acidic Al Species of Alkali-Treated HZSM-5 in Methanol Aromatization |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-03T04%3A35%3A24IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=The%20Role%20of%20Non-Framework%20Lewis%20Acidic%20Al%20Species%20of%20Alkali-Treated%20HZSM-5%20in%20Methanol%20Aromatization&rft.jtitle=Catalysts&rft.au=Lai,%20Po-Chen&rft.date=2017-09-01&rft.volume=7&rft.issue=9&rft.spage=259&rft.pages=259-&rft.issn=2073-4344&rft.eissn=2073-4344&rft_id=info:doi/10.3390/catal7090259&rft_dat=%3Cproquest_cross%3E1952148901%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1952148901&rft_id=info:pmid/&rfr_iscdi=true |