Effect of synthesis conditions on zeolite Beta properties and its performance in vacuum gas oil hydrocracking activity

Manrique, Cecilia; Guzmán, Alexander; Pérez‐Pariente, Joaquín; Márquez‐Álvarez, Carlos; Echavarrı́a, Adriana

doi:10.1016/j.micromeso.2016.07.017

Cited by 37 publications

(13 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This confirms that a decrease in the water molar fraction from 17.958 to 8.980 allowed a shift from the amorphous phase to BEA crystal formation. This is similar to the findings of Manrique et al (2016) and Gabrienko et al (2010), who showed that a higher H 2 O/SiO 2 ratio led to the formation of amorphous materials rather than a pure BEA phase. Similarly, with the molar H 2 O 8.980, the BEA framework structure was maintained when the hydrothermal time was reduced to 24 and 48 h (H24 and H48, respectively) (Figure 2, Supplementary Figure S1).…”

Section: Hydrothermal Synthesis Of Bea Zeolites From Nanosilica Extractsupporting

confidence: 91%

Acylation of Anisole With Benzoyl Chloride Over Rapidly Synthesized Fly Ash–Based HBEA Zeolite

et al. 2021

View full text Add to dashboard Cite

Stable HBEA zeolite with high surface area and strong acid sites was synthesized from coal fly ash–based silica extract via indirect hydrothermal synthesis. The rapid HBEA hydrothermal crystallization times of 8, 10, and 12 h were achieved through a reduced molar water fraction in the synthesis composition. The HBEA zeolites prepared from fly ash silica extract exhibited well-defined spheroidal-shaped crystal morphology with uniform particle sizes of 192, 190, or 239 nm obtained after 8, 10, or 12 h of synthesis time, respectively. The high surface area and the microporous area of 702 and 722 m2/g were achieved as a function of shorter hydrothermal synthesis durations (10 and 24 h, respectively) compared to 48 or 72 h, which resulted in HBEA zeolites with lower surface areas of 538 and 670 m2/g. Likewise, temperature-programmed desorption measurements of fly ash–based HBEA zeolites revealed the presence of weak and strong acid sites in the zeolite. The submicron crystal sizes with a well-defined porosity of HBEA zeolites enhanced the diffusion of anisole and benzoyl chloride molecules toward the active acid sites and hence showed better conversion and selectivity in acylation products. High conversion of benzoyl chloride with anisole was achieved, reaching up to 83% with a 93–96% selectivity toward 4-methoxyacetophenone.

show abstract

Section: Hydrothermal Synthesis Of Bea Zeolites From Nanosilica Extractsupporting

confidence: 91%

Acylation of Anisole With Benzoyl Chloride Over Rapidly Synthesized Fly Ash–Based HBEA Zeolite

et al. 2021

View full text Add to dashboard Cite

show abstract

“…According to this fact that the amount of ammonia desorbed in the high temperature region indicates strong zeolitic acid sites, it could be concluded that the concentration of strong acid sites is responsible for zeolite acidity in hydrocracking reaction [28]. Higher strong acid sites may cause higher cracking and more low products that undesirable for this work.…”

Section: Characterization Of Catalystsmentioning

confidence: 81%

The Effect of Aluminum Source on Performance of Beta-Zeolite as a Support for Hydrocracking Catalyst

Hadi¹,

Aghabozorg²,

Bozorgzadeh³

et al. 2018

Bull. Chem. React. Eng. Catal.

View full text Add to dashboard Cite

In this paper, three different kinds of aluminum sources (sodium aluminate, aluminum sulfate and aluminum isopropylate) were used for preparing of nano beta-zeolite. The as synthesized zeolites were mixed with the as prepared amorphous silica-alumina to produce the supports for hydrocracking catalyst. The prepared supports were used for preparation of NiMo/silica alumina-nano beta-zeolite by impregnation method. The influence of the aluminum source for preparation of beta-zeolite on the performance of the prepared catalysts has been studied. The samples were thoroughly characterized by X-Ray diffraction method (XRD), field emission-scanning electron microscopy (FE-SEM), N2 adsorption-desorption isotherms (BET), temperature programmed desorption (TPD) and temperature programmed reduction (TPR) methods. The catalysts performance was evaluated by vacuum gas oil (VGO) hydrocracking at 390 oC in a fixed bed reactor. The XRD patterns showed that the beta-zeolite samples obtained from the present methods were pure and highly crystalline and the crystal size of the prepared zeolites were in nanometer scale. Crystallite size of nano beta-zeolite synthesized by aluminum isopropylate [Al(iPrO)3] was smaller than those of prepared by the other aluminum sources. The catalyst containing this zeolite with higher surface area (231 m2/g) and more available acid sites (1.66 mmol NH3/g) possessed higher activity and selectivity to gas oil (71.9 %). Copyright © 2018 BCREC Group. All rights reservedReceived: 25th April 2018; Revised:22nd July 2018; Accepted: 29th July 2018How to Cite: Hadi, M., Aghabozorg, H.R., Bozorgzadeh, H.R., Ghasemi, M.R. (2018). The Effect of Aluminum Source on Performance of Beta-Zeolite as a Support for Hydrocracking Catalyst. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (3): 543-552 (doi:10.9767/bcrec.13.3.2570.543-552)Permalink/DOI: https://doi.org/10.9767/bcrec.13.3.2570.543-552

show abstract

“…In the IR spectra of H 6 P 2 W 18 O 62 /beta zeolite, the four characteristic peaks relating to the oxygen atoms can be observed at 793, 915, 963 and 1098 cm −1 assigned to the stretching vibrations of ν as (W‐O c ‐W), ν as (W‐O b ‐W), ν as (W‐O d ) and ν as (P‐O b ) vibrations, respectively which confirmed the encapsulation of the heteropoly acid within the nanocages of beta zeolite. In addition, it can be assumed that the presence of peaks in the region of 3600–3800 cm −1 is related to the tetrahedral aluminum in the zeolite framework and a weak shoulder band at 1230 cm −1 , the board bond around 1000–1300 cm −1 , 800 cm −1 and 450–600 cm −1 ascribed to the lattice vibrations of beta zeolite (Fig. ).…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Performance of H₆P₂W₁₈O₆₂/TiO₂ Nanocomposite Encapsulated into Beta Zeolite under UV Irradiation in the Degradation of Methyl Orange

Moosavifar

2018

Photochem & Photobiology

View full text Add to dashboard Cite

In this work, neat and supported H P W O into nanocage of β-zeolite were synthesized. However, H P W O into nanocage of β-zeolite was synthesized via template synthesis method. In addition, TiO was supported on H P W O /β zeolite by impregnation method. The obtained materials were characterized by XRD, FT-IR, UV-Vis, FESEM and EDS techniques. Also, W and Ti contents of the catalyst were determined by ICP and EDS technique. The results reveal that the photocatalyst performance depends on catalyst loading, pH effect, and methyl orange concentration. Photocatalytic degradation of methyl orange follows a pseudo-first order kinetic. The chemical oxygen demand (COD) experimental proved mineralization of methyl orange. Another reason for degradation and mineralization of methyl orange is the absence of hydrazine at the end of reaction which is one of the photodecolorization products. The plausible mechanism for photodegradation of MO was proposed.

show abstract

Effect of synthesis conditions on zeolite Beta properties and its performance in vacuum gas oil hydrocracking activity

Cited by 37 publications

References 40 publications

Acylation of Anisole With Benzoyl Chloride Over Rapidly Synthesized Fly Ash–Based HBEA Zeolite

Acylation of Anisole With Benzoyl Chloride Over Rapidly Synthesized Fly Ash–Based HBEA Zeolite

The Effect of Aluminum Source on Performance of Beta-Zeolite as a Support for Hydrocracking Catalyst

Photocatalytic Performance of H₆P₂W₁₈O₆₂/TiO₂ Nanocomposite Encapsulated into Beta Zeolite under UV Irradiation in the Degradation of Methyl Orange

Contact Info

Product

Resources

About

Effect of synthesis conditions on zeolite Beta properties and its performance in vacuum gas oil hydrocracking activity

Cited by 37 publications

References 40 publications

Acylation of Anisole With Benzoyl Chloride Over Rapidly Synthesized Fly Ash–Based HBEA Zeolite

Acylation of Anisole With Benzoyl Chloride Over Rapidly Synthesized Fly Ash–Based HBEA Zeolite

The Effect of Aluminum Source on Performance of Beta-Zeolite as a Support for Hydrocracking Catalyst

Photocatalytic Performance of H6P2W18O62/TiO2 Nanocomposite Encapsulated into Beta Zeolite under UV Irradiation in the Degradation of Methyl Orange

Contact Info

Product

Resources

About

Photocatalytic Performance of H₆P₂W₁₈O₆₂/TiO₂ Nanocomposite Encapsulated into Beta Zeolite under UV Irradiation in the Degradation of Methyl Orange