Catalysis is one of the most crucial fields, such as alkylation reaction1, alkane aromatization and dehydrogenation2-4, bio-oil upgrading5-8, sugar utilization and ethanol conversion9. Hence, to achieve these potential reactions, the synthesis of catalysts is one of the most challenging researches. Regarding to mass/heat transportation limitation of conventional zeolites, we are focusing on the design of hierarchical zeolites, which compose of micropores and mesopores or/and macropores to facilitate to increase the selectivity of desired products and prevent catalyst deactivation. Therefore, we are developing various types of hierarchical zeolites such as Faujasite (FAU)1, 5-7, ZSM-5 (MFI)2-4, 8-9and Ferrierite (FER) nanosheets10. In addition, we are not only focusing on the monofunctional catalyst to utilize in the reactions, but we are also focusing on the development of hybrid catalysts. It is undeniable that there are a large number of crucial chemicals, which can be produced using at least two types of active sites, for example, Brønsted acid/Lewis acid sites and acid/basic sites. From these perspectives, we are developing metals modified zeolites and also zeolite-based hybrid catalysts, such as zeolite@Metal-organic Frameworks (MOFs) composite7, zeolite@zeolite composites and porous silica/alumina composites for achieving the reactions.

 References

  1. Yutthalekha, T., Warakulwit, C., Wattanakit, C., Wannapakdee, W., Witoon, T., Limtrakul, J. 
    “Hierarchical FAU-type Zeolite Nanosheets as Green and Sustainable Catalysts for Benzylation of Toluene”
    J. Clean. Prod., 2017, 142 (3), 1244-1251.

  2. Wannapakdee, W., Wattanakit, C., Paluka, V., Yutthalekha, T., Limtrakul, J.
    “One-pot synthesis of novel hierarchical bifunctional Ga/HZSM-5 nanosheets for propane aromatization”
    RSC Adv., 2016, 6, 2875-2881.

  3. Wannapakdee, W.,Suttipat, D., Dugkhuntod, P., Yutthalekha, T., Thivasasith, A., Kidkhunthod, P., Pengpanich, S., Limtrakul, J., Wattanakit, C.,
    “Enhancing Catalytic Activity and Selectivity of BTEX from C5Hydrocarbons Reforming using Hierarchical Zeolite Nanosheets” 
    Fuel,2019, 236, 1243 – 1252.

  4. Wannapakdee, W.,Yuthalekha, T., Dugkhuntod, P., Rodponthukwaji, K., Thivasasith, A., Nokbin, S., Witoon, T., Pengpanich, S., Wattanakit, C. 
    “Dehydrogenation of Propane to Propylene Using Promoter-free Hierarchical Pt/silicalite-1 Nanosheets”
    Catalysts, 2019, 9, 174 – 187.

  5. Yutthalekha, T., Suttipat, D., Salakhum S., Thivasasith A., Nokbin S., Limtrakul J., and Wattanakit C.
    “Aldol condensation of biomass-derived platform molecules over amine- grafted hierarchical FAU-type zeolite nanosheets (Zeolean) featuring basic sites”
    Chem. Commun., 2017,53, 12185-12188.

  6. Salakhum, S., Yutthalekha, T., Chareonpanich, M., Limtrakul, J., and Wattanakit, C.
    “Synthesis of hierarchical faujasite nanosheets from corn cob ash-derived nanosilica as efficient catalysts for hydrogenation of lignin-derived alkylphenols”
    Microporous Mesoporous Mater., 2018, 258, 141-150.

  7. Suttipat, D., Yutthalekha, T., Wannapakdee, W., Bureekaew, S., and Wattanakit C.
    “Hierarchical FAU/ZIF-8 Hybrid Materials as Highly Efficient Acid–Base Catalysts for Aldol Condensation” 
    ACS Appl. Mater. Interfaces, 2018, 10, 16358-16366.

  8. Salakhum, S., Yutthalekha, T., Shetsiri, S., Witoon, T., and Wattanakit, C.
    “Bifunctional and Bimetallic Pt-Ru/HZSM-5 Nanoparticles for the Mild Hydrodeoxygenation of Lignin-Derived 4-Propylphenol”
    ACS Appl. Nano. Mater., 2019, 2, 2, 1053-1062.

  9. Shetsiri, S., Thivasasith A., Saenluang, K., Wannapakdee, W.,Salakhum, S., Nokbin, S., Limtrakul, J., Wattanakit C.
    “Sustainable Production of Ethylene from Bioethanol over Hierarchical ZSM-5 Nanosheets” 
    Sustainable Energy & Fuel, 2019, 3, 115 – 126.

  1. Wuamprakhon, P., Wattanakit, C., Warakulwit, C., Yutthalekha, T., Wannapakdee, W., Ittisanronnachai, S., Limtrakul, J.
    “Direct synthesis of hierarchical ferrierite nanosheet assemblies via an organosilane template approach and determination of their catalytic activity”
    Microporous Mesoporous Mater.,2015, 219, 1-9.

 

Aldol condensation of biomass-derived platform molecules over amine-grafted hierarchical FAU-type zeolite nanosheets featuring basic sites.

 

Energy demand and chemical consumption have been increased in the past century due to the limitation of fossil fuels, and therefore other alternative renewable resources have gained a lot of interest from researchers around the world.  One of the most interested resources is Biomass. Biomass has the potential to supply renewable transportation fuels, organic chemicals and materials demand. In our group, we divided our research topics into three different topics, which are sugar conversion to chemicals, bioethanol/methanol to chemicals, and bio-oil upgrading to chemicals and transportation fuels.

Selected publications

  1. Shetsiri, S.; Thivasasith, A.; Saenluang, K.; Wannapakdee, W.; Salakhum, S.; Wetchasat, P.; Nokbin, S.; Limtrakul, J.; Wattanakit, C.
    Sustainable production of ethylene from bioethanol over hierarchical ZSM-5 nanosheets.
    Sustain. Energ. Fuels 2019.

  2. Yutthalekha, T.; Suttipat, D.; Salakhum, S.; Thivasasith, A.; Nokbin, S.; Limtrakul, J.; Wattanakit, C.
    Aldol condensation of biomass-derived platform molecules over amine-grafted hierarchical FAU-type zeolite nanosheets (Zeolean) featuring basic sites.
    Chem. Commun. 2017, 53 (90), 12185-12188.

  3. Salakhum, S.; Yutthalekha, T.; Chareonpanich, M.; Limtrakul, J.; Wattanakit, C.
    Synthesis of hierarchical faujasite nanosheets from corn cob ash-derived nanosilica as efficient catalysts for hydrogenation of lignin-derived alkylphenols.
    Microporous Mesoporous Mater. 2018, 258, 141-150.

  4. Salakhum, S.; Yutthalekha, T.; Shetsiri, S.; Witoon, T.; Wattanakit, C.
    Bifunctional and Bimetallic Pt-Ru/HZSM-5 Nanoparticles for the Mild Hydrodeoxygenation of Lignin-Derived 4-Propylphenol.
    ACS. Appl. Nano Mater. 2019.

 

Aldol condensation of biomass-derived platform molecules over amine-grafted hierarchical FAU-type zeolite nanosheets (Zeolean) featuring basic sites

 

Enantioselective synthesis and separation are of crucial importance for many potential applications ranging from sensing to catalysis. We have successfully elaborated chiral imprinted mesoporous platinum, obtained by the electrochemical reduction of platinum salts in the simultaneous presence of a liquid crystal phase of nonionic surfactants and various chiral template molecules, such as enantiomers of 3,4-dihydroxyphenylalanine (DOPA), mandelic acid and phenylethanol [1]. The chiral encoded mesoporous platinum perfectly retains the chiral information after removal of the template, confirmed by a very significant discrimination between two enantiomers when using these materials as electrodes in Differential Pulse Voltammetry. Interestingly, such nanostructured metals are also able to break the symmetry during the electrosynthesis of chiral molecules such as mandelic acid, and phenylethanol [2-4]. We were able to demonstrate that by optimizing the electrochemical synthesis parameters it is possible to achieve very high enantiomeric excess (>90 %) [4]. Apart from asymmetric synthesis, chiral separation can also be achieved using such imprinted mesoporous platinum as a stationary phase in a microfluidic channel. It is possible to fine-tune the electrostatic interactions between the encoded surfaces and the corresponding chiral molecules by applying an electric field, allowing the complete separation of chiral compounds [5]. Therefore, these novel materials open up new promising perspectives in various fields ranging from electrosynthesis to chiral separation technologies.

References:

  1. C. Wattanakit, Y. B. S. Côme, V. Lapeyre, P. A. Bopp, M. Heim, S. Yadnum, S. Nokbin, C. Warakulwit, J. Limtrakul, A. Kuhn
    Nat. Comm. (2014) 5:3325.

  2. T. Yutthalekha, C. Wattanakit, V. Lapeyre, S. Nokbin, C. Warakulwit, J. Limtrakul, A. Kuhn.
    Nat. Comm. (2016) 7:12678.

  3. C. Wattanakit 
    Curr. Opin. Electrochem. 7 (2017) 54–60.

  4. C. Wattanakit, T. Yutthalekha, S. Assavapanumat, V. Lapeyre, A. Kuhn
    Nat. Comm. (2017) 8: 2087.

  5. S. Assavapanumat, T. Yutthalekha, P. Garrigue, B. Goudeau, V. Lapeyre, A. Perro, N. Sojic, C. Wattanakit, A. Kuhn
    Angew. Chem. Int. Ed. (2019) in press, DOI: 10.1002/anie.201812057.


 

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