ZSM-5 fast synthesis employing soluble starch as template
Solid catalysts with a zeolitic framework were synthesized in the ZSM-5 (MFI) topology employing tetrapropyl ammonium hydroxide (TPAOH) as structure directing agent and soluble starch as template in order to be employed in biomass revalorization reactions. It should be noted that starch is a s...
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| Autores principales: | , , , |
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| Formato: | Documento de conferencia publisherVersion |
| Lenguaje: | Inglés |
| Publicado: |
2022
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| Acceso en línea: | http://hdl.handle.net/20.500.12272/6536 |
| Aporte de: |
| id |
I68-R174-20.500.12272-6536 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Tecnológica Nacional |
| institution_str |
I-68 |
| repository_str |
R-174 |
| collection |
RIA - Repositorio Institucional Abierto (UTN) |
| language |
Inglés |
| topic |
ZSM-5 Synthesis Starch |
| spellingShingle |
ZSM-5 Synthesis Starch Bonetto, Luciana Renzini, María Soledad Saux, Clara Pierella, Liliana Beatriz ZSM-5 fast synthesis employing soluble starch as template |
| topic_facet |
ZSM-5 Synthesis Starch |
| description |
Solid catalysts with a zeolitic framework were synthesized in the ZSM-5 (MFI) topology
employing tetrapropyl ammonium hydroxide (TPAOH) as structure directing agent and soluble starch
as template in order to be employed in biomass revalorization reactions. It should be noted that starch
is a soluble, biodegradable, low cost and nontoxic polymeric carbohydrate obtained from agricultural
raw materials. Starch is employed in thissynthesis processfor pores generation and crystal connection
to produce a material with MFI morphology type.
ZSM-5 is a medium pore material from the pentasil zeolites group. The traditional synthesis
procedure [1] takes around 10 days to obtain the MFI structure. In this new procedure, ZSM-5 type
material is obtained by a hydrothermal treatment but in a shorter crystallization time. The effect of
time on structure and cristallinity was studied.
Zeolite synthesis was done employing sodium aluminate (NaAlO2) as aluminum source,
tetraethyl orthosilicate (TEOS) as silicon source, TPAOH and distilled water. The solution was aged
at 80 °C for 210 minutes under vigorous stirring. Ethanol produced from TEOS hydrolysis was
evaporated and a clear gel was obtained. Then, different starch quantities dissolved in aqueous
solutions were incorporated and further stirred for 30 minutes at the same temperature. The result
suspension was hydrothermally treated at 140 °C in a Teflon lined stainless steel autoclave under
static conditions. Crystallization time was varied between 96, 48 and 24 hours and the obtained
material was washed with distilled water and dried at 110 °C for 24 hours. Finally, the solid were
desorbed under N2 flow (20 ml/min) at 500 °C and further calcined at the same temperature for 8
hours in order to remove the carbonized starch and the organic structure directing agent trapped in
the crystals. According to the crystallization time, samples were named as MFI-96, MFI-48 and MFI 24, respectively.
The obtained samples were characterized by X Ray Diffraction (XRD), BET and Scanning
Electron Microscopy to confirm structure, crystallinity and surface area. From XRD patterns high
crystallinity and MFI structure were confirmed, indicating the successful crystallization in short time
when soluble starch was added in the synthesis gel. Surface areas calculated from BET were similar
to that obtained for traditional ZSM-5 (approximately 360 m2
/g).
The so far synthesized and characterized materials were tested as catalysts for peanut shells
valorization reactions to obtain platform molecules for the fine chemical industry. |
| format |
Documento de conferencia publisherVersion |
| author |
Bonetto, Luciana Renzini, María Soledad Saux, Clara Pierella, Liliana Beatriz |
| author_facet |
Bonetto, Luciana Renzini, María Soledad Saux, Clara Pierella, Liliana Beatriz |
| author_sort |
Bonetto, Luciana |
| title |
ZSM-5 fast synthesis employing soluble starch as template |
| title_short |
ZSM-5 fast synthesis employing soluble starch as template |
| title_full |
ZSM-5 fast synthesis employing soluble starch as template |
| title_fullStr |
ZSM-5 fast synthesis employing soluble starch as template |
| title_full_unstemmed |
ZSM-5 fast synthesis employing soluble starch as template |
| title_sort |
zsm-5 fast synthesis employing soluble starch as template |
| publishDate |
2022 |
| url |
http://hdl.handle.net/20.500.12272/6536 |
| work_keys_str_mv |
AT bonettoluciana zsm5fastsynthesisemployingsolublestarchastemplate AT renzinimariasoledad zsm5fastsynthesisemployingsolublestarchastemplate AT sauxclara zsm5fastsynthesisemployingsolublestarchastemplate AT pierellalilianabeatriz zsm5fastsynthesisemployingsolublestarchastemplate |
| bdutipo_str |
Repositorios |
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