Optimization of the synthesis of SAPO-11 for the methylation of naphthalene with methanol by varying templates and template content

Detalhes bibliográficos
Autor(a) principal: Wang,Xiaoxiao
Data de Publicação: 2013
Outros Autores: Zhang,Wei, Guo,Shaoqing, Zhao,Liangfu, Xiang,Hongwei
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013000700012
Resumo: SAPO-11 zeolites were successfully synthesized by using three different templates (diethylamine (DEA), di-n-propylamine (DPA) and di-isopropylamine (DIPA)) and varying DPA contents (nDPA/Al2O3 = 0.8, 1.2, 1.6 and 2.0) under hydrothermal conditions. The samples were characterized by powder X-ray diffractometry (XRD), scanning electron microscopy (SEM), N2 adsorption-desorption, temperature programmed desorption of ammonia (NH3-TPD) and29 Si magic angle spinning (MAS) nuclear magnetic resonance (NMR). The samples were also evaluated towards the methylation of naphthalene with methanol to produce 2,6-dimethylnaphthalene (2,6-DMN). XRD results indicated that the directing effect of the different templates for AEL (Aluminophosphate-ELeven) structure decreased in the order DPA > DEA > DIPA and the most suitable DPA content was nDPA/Al2O3 = 1.2. N2 adsorption-desorption results showed that SAPO-11(DPA,1.2) exhibited the broadest pore size distribution, the highest BET specific surface area and the largest pore volume among all the SAPO-11 samples. SAPO-11(DPA,1.2) exhibited high catalytic performances in the methylation of naphthalene due to its high crystallinity, high external surface and broad pore size distribution. The pore structure of SAPO-11 zeolite, rather than its acidity, played an important role in achieving high catalytic performances in the methylation of naphthalene with methanol.
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spelling Optimization of the synthesis of SAPO-11 for the methylation of naphthalene with methanol by varying templates and template contentSAPO-11templatestemplate contentmethylation of naphthaleneSAPO-11 zeolites were successfully synthesized by using three different templates (diethylamine (DEA), di-n-propylamine (DPA) and di-isopropylamine (DIPA)) and varying DPA contents (nDPA/Al2O3 = 0.8, 1.2, 1.6 and 2.0) under hydrothermal conditions. The samples were characterized by powder X-ray diffractometry (XRD), scanning electron microscopy (SEM), N2 adsorption-desorption, temperature programmed desorption of ammonia (NH3-TPD) and29 Si magic angle spinning (MAS) nuclear magnetic resonance (NMR). The samples were also evaluated towards the methylation of naphthalene with methanol to produce 2,6-dimethylnaphthalene (2,6-DMN). XRD results indicated that the directing effect of the different templates for AEL (Aluminophosphate-ELeven) structure decreased in the order DPA > DEA > DIPA and the most suitable DPA content was nDPA/Al2O3 = 1.2. N2 adsorption-desorption results showed that SAPO-11(DPA,1.2) exhibited the broadest pore size distribution, the highest BET specific surface area and the largest pore volume among all the SAPO-11 samples. SAPO-11(DPA,1.2) exhibited high catalytic performances in the methylation of naphthalene due to its high crystallinity, high external surface and broad pore size distribution. The pore structure of SAPO-11 zeolite, rather than its acidity, played an important role in achieving high catalytic performances in the methylation of naphthalene with methanol.Sociedade Brasileira de Química2013-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013000700012Journal of the Brazilian Chemical Society v.24 n.7 2013reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0103-5053.20130152info:eu-repo/semantics/openAccessWang,XiaoxiaoZhang,WeiGuo,ShaoqingZhao,LiangfuXiang,Hongweieng2013-07-31T00:00:00Zoai:scielo:S0103-50532013000700012Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2013-07-31T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Optimization of the synthesis of SAPO-11 for the methylation of naphthalene with methanol by varying templates and template content
title Optimization of the synthesis of SAPO-11 for the methylation of naphthalene with methanol by varying templates and template content
spellingShingle Optimization of the synthesis of SAPO-11 for the methylation of naphthalene with methanol by varying templates and template content
Wang,Xiaoxiao
SAPO-11
templates
template content
methylation of naphthalene
title_short Optimization of the synthesis of SAPO-11 for the methylation of naphthalene with methanol by varying templates and template content
title_full Optimization of the synthesis of SAPO-11 for the methylation of naphthalene with methanol by varying templates and template content
title_fullStr Optimization of the synthesis of SAPO-11 for the methylation of naphthalene with methanol by varying templates and template content
title_full_unstemmed Optimization of the synthesis of SAPO-11 for the methylation of naphthalene with methanol by varying templates and template content
title_sort Optimization of the synthesis of SAPO-11 for the methylation of naphthalene with methanol by varying templates and template content
author Wang,Xiaoxiao
author_facet Wang,Xiaoxiao
Zhang,Wei
Guo,Shaoqing
Zhao,Liangfu
Xiang,Hongwei
author_role author
author2 Zhang,Wei
Guo,Shaoqing
Zhao,Liangfu
Xiang,Hongwei
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Wang,Xiaoxiao
Zhang,Wei
Guo,Shaoqing
Zhao,Liangfu
Xiang,Hongwei
dc.subject.por.fl_str_mv SAPO-11
templates
template content
methylation of naphthalene
topic SAPO-11
templates
template content
methylation of naphthalene
description SAPO-11 zeolites were successfully synthesized by using three different templates (diethylamine (DEA), di-n-propylamine (DPA) and di-isopropylamine (DIPA)) and varying DPA contents (nDPA/Al2O3 = 0.8, 1.2, 1.6 and 2.0) under hydrothermal conditions. The samples were characterized by powder X-ray diffractometry (XRD), scanning electron microscopy (SEM), N2 adsorption-desorption, temperature programmed desorption of ammonia (NH3-TPD) and29 Si magic angle spinning (MAS) nuclear magnetic resonance (NMR). The samples were also evaluated towards the methylation of naphthalene with methanol to produce 2,6-dimethylnaphthalene (2,6-DMN). XRD results indicated that the directing effect of the different templates for AEL (Aluminophosphate-ELeven) structure decreased in the order DPA > DEA > DIPA and the most suitable DPA content was nDPA/Al2O3 = 1.2. N2 adsorption-desorption results showed that SAPO-11(DPA,1.2) exhibited the broadest pore size distribution, the highest BET specific surface area and the largest pore volume among all the SAPO-11 samples. SAPO-11(DPA,1.2) exhibited high catalytic performances in the methylation of naphthalene due to its high crystallinity, high external surface and broad pore size distribution. The pore structure of SAPO-11 zeolite, rather than its acidity, played an important role in achieving high catalytic performances in the methylation of naphthalene with methanol.
publishDate 2013
dc.date.none.fl_str_mv 2013-07-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013000700012
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013000700012
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.5935/0103-5053.20130152
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.24 n.7 2013
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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