Applied; Chemistry

Accordion-like effect of flexible organic structure-directing agents in the synthesis of ferrierite zeolite

Authors: Almeida, RKS; Perez-Pariente, J; Gomez-Hortiguela, L

Microporous Mesoporous Mat.. vol: 300. page: 1387-1811.
Date: jun-15. 2020.
Doi: 10.1016/j.micromeso.2020.110149.

Ferrierite zeolite was synthesized by a co-structure-directing route using a highly flexible diquaternary ammonium cation (N,N’-bis-triethylpentanediyldiammonium) as a structure directing agent in combination with tetramethylammonium as a small co-structure-directing agent. Strong alterations of the C-13 NMR bands of the bulky organic [leer más]

Mineralizer effects on the physicochemical and catalytic properties of AlMCM-41 mesoporous materials

Authors: Ng, EP; Abdullahi, H; Khoerunnisa, F; Maireles-Torres, P; Lee, HL; Adam, F; Ling, TC; Wong, KL

Microporous Mesoporous Mat.. vol: 297. page: 1387-1811.
Date: may-01. 2020.
Doi: 10.1016/j.micromeso.2020.110016.

The effects of various alkali metal hydroxide mineralizers (LiOH, NaOH, KOH and CsOH) on the formation of AlMCM-41 mesoporous materials were investigated. The ordering of mesostructure was reduced when stronger base [leer más]

Synthesis and Characterization of Aluminophosphates Type-5 and 36 Doubly Modified with Si and Zn and Its Catalytic Application in the Reaction of Methanol to Hydrocarbons (MTH)

Authors: Ruiz, MG; Casados, DAS; Pliego, JA; Alvarez, CM; de Andres, ES; Tartalo, DS; Sanchez-Sanchez, M; Casas, MG

Article; Early Access.
Top. Catal.. vol: . page: 1022-5528.
Date: . .
Doi: 10.1007/s11244-020-01266-3.

This paper presents a study of the synthesis of AlPO4-5 and AlPO4-36 materials doubly substituted by Si and Zn, as acid function and aromatizing function, respectively. The physicochemical properties [leer más]

Advantageous enzyme selective extraction process of essential spirulina oil

Authors: Verdasco-Martin, CM; Diaz-Lozano, A; Otero, C

Article; Proceedings Paper.
Catal. Today. vol: 346. page: 0920-5861.
Date: APR 15. 2020.
Doi: 10.1016/j.cattod.2019.02.066.

Spirulina is an important source of metabolites and nutrients. It grows rapidly with low land requirements, and it is an ideal feedstock for implementation of a biofactory of bioactive products. A Part of intracelular bio-components are not extracted with [leer más]

Guaiacol hydrodeoxygenation over Ni2P supported on 2D-zeolites

Authors: Gutierrez-Rubio, S; Berenguer, A; Prech, J; Opanasenko, M; Ochoa-Hernandez, C; Pizarro, P; Cejka, J; Serrano, DP; Coronado, JM; Moreno, I

Article; Proceedings Paper.
Catal. Today. vol: 345. page: 0920-5861.
Date: APR 1. 2020.
Doi: 10.1016/j.cattod.2019.11.015.

Different 2D zeolites, namely lamellar ZSM-5 (L-ZSM-5), the corresponding silica pillared ZSM-5 (PI-ZSM-5) and an MCM-22 sample, were investigated as nickel phosphide supports and evaluated [leer más]

Performance of three different cations based on imidazolium ring as structure directing agents in the synthesis of aluminophosphates and silicoaluminophosphates microporous materials

Authors: Almeida, G; Variani, YM; Gomez-Hortiguela, L; Mercury, JMR; Rojas, A

Microporous Mesoporous Mat.. vol: 294. page: 1387-1811.
Date: mar-01. 2020.
Doi: 10.1016/j.micromeso.2019.109861.

In this work three different cations based on imidazolium rings, 2-ethyl-1,3,4-trimethylimidazolium (2E134TMI), 1,2,3-triethyl-4-methylimidazolium (123TE4MI) and 1,2,3-triethylimidazolium (123TEI), were employed as structure directing agents (SDA) for the synthesis of aluminophosphate and silicoaluminophosphate microporous materials. The cations allowed the [leer más]

Synthesis of 10 and 12 Ring Zeolites (MCM-22, TNU-9 and MCM-68) Modified with Zn and Its Potential Application in the Reaction of Methanol to Light Aromatics and Olefins

Authors: Garcia-Ruiz, M; Solis-Casados, DA; Aguilar-Pliego, J; Marquez-Alvarez, C; Sastre-de Andres, E; Sanjurjo-Tartalo, D; Sainz-Vaque, R; Grande-Casas, M

Article; Early Access.
Top. Catal.. vol: . page: 1022-5528.
Date: . .
Doi: 10.1007/s11244-020-01242-x.

The effect on the incorporation of zinc of three zeolites TNU-9, MCM-22, and MCM-68 was investigated. The physico-chemical properties of zeolites were studied by X-ray diffraction, N-2-adsorption, temperature-programmed [leer más]

Direct sulfation of a Zr-based metal-organic framework to attain strong acid catalysts

Authors: Fernandez-Morales, JM; Lozano, LA; Castillejos-Lopez, E; Rodriguez-Ramo, I; Guerrero-Ruiz, A; Zamaro, JM

Microporous Mesoporous Mat.. vol: 290. page: 1387-1811.
Date: DEC. 2019.
Doi: 10.1016/j.micromeso.2019.109686.

The application of Metal-Organic Frameworks (MOFs) in gas phase heterogeneous catalysis is still not widely spread because of their limited stability under reaction conditions. Obtaining stable acidic MOFs to be used in reactions that demand [leer más]

Ultrasmall Cs-AlMCM-41 basic catalysts: Effects of aluminum addition on their physico-chemical and catalytic properties

Authors: Ng, EP; Abdullahi, H; Wong, KL; Gines-Molina, MJ; Maireles-Torres, P; Rigolet, S; Daou, TJ; Chia, S; Lee, HL

Microporous Mesoporous Mat.. vol: 288. page: 1387-1811.
Date: nov-01. 2019.
Doi: 10.1016/j.micromeso.2019.109599.

In this study, ultra-small MCM-41 mesoporous solids (< 30 nm) were synthesized using colloidal silica and cesium hydroxide as cheap silica source and mineralize; respectively. Four samples with a [leer más]

Conformational sieving effect of organic structure-directing agents during the synthesis of zeolitic materials

Authors: Nieto, D; Perez-Pariente, J; Toran, E; Lopez-Arbeloa, F; Gomez-Hortiguela, L

Microporous Mesoporous Mat.. vol: 287. page: 1387-1811.
Date: OCT. 2019.
Doi: 10.1016/j.micromeso.2019.05.052.

In this work we find a novel conformational sieving effect during the structure-direction of two chiral organic diastereoisomers, (1R,2S)-benzyl-ephedrine and (1S,2S)-benzyl-pseudoephedrine, during the synthesis of zeolitic aluminophosphates. Protonation of each diastereoisomer can take place through two different [leer más]


noviembre 2020
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