The role of nanosized zeolite Y in the H<sub>2</sub>-free catalytic deoxygenation of triolein

Choo, Min-Yee; Juan, Joon Ching; Oi, Lee Eng; Ling, Tau Chuan; Ng, Eng-Poh; Noorsaadah, A.R.; Centi, Gabriele; Lee, Keat Teong

doi:10.1039/c8cy01877d

Cited by 39 publications

(20 citation statements)

References 66 publications

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“…XRD patterns of MZMs (as shown in Figure 2A ) show that the MZMs are largely amorphous with the typical broad signal corresponding to silica at around 25° 2θ. However, the crystalline phase of the parent Y is still preserved to a very small extent, as evidenced by the remaining Y zeolite (111) (2θ = 6.2°), (331) (2θ = 15.6°), and (533) (2θ = 23.8°) planes in MZMs (Aghakhani et al, 2014 ; Choo et al, 2019 ).…”

Section: Resultsmentioning

confidence: 99%

Mesoporous Zeolitic Materials (MZMs) Derived From Zeolite Y Using a Microwave Method for Catalysis

Abdulridha

Jiao

et al. 2020

Front. Chem.

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Mesostructured zeolitic materials (MZMs) with relatively high acidity in comparison with the mesoporous siliceous MCM-41 were prepared via an efficient, mild, and simple post-synthetic treatment of Y zeolite facilitated by microwave irradiation, i.e., microwave-assisted chelation (MWAC). The disordered mesoporous aluminosilicates materials (DMASs) of MZM were created from Y zeolite in the absence of using mesoscale templates. The prepared DMASs showed the good mesoporous features with the mesopore area and volume of ∼260 m 2 g −1 and ∼0.37 cm 3 g −1 , respectively, and with the mesopore sizes distributed in a range of 2-10 nm. MZMs possess a total acidity of about 0.6 mmol g −1 and exhibited comparatively superior catalytic activity to the parent Y zeolite and MCM-41 in the vapor phase catalytic dealkylation of 1,3,5-triisopropylbenzene (TiPBz) and liquid phase catalytic aldol condensation of benzaldehyde with 1-heptanal. Although the yield loss was inevitable for preparing MZMs using the MWAC method, the preliminary economic analysis of the preparation cost of MZMs showed the promise. Additionally, a comprehensive comparison of the state-of-the-art mesoporous materials concerning their sustainable aspects was made, showing that MZMs are promising mesoporous materials for further development and functionalization for catalysis.

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Section: Resultsmentioning

confidence: 99%

Mesoporous Zeolitic Materials (MZMs) Derived From Zeolite Y Using a Microwave Method for Catalysis

Abdulridha

Jiao

et al. 2020

Front. Chem.

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“…The parent Y65 was synthesized according to our previous work [ 39 ]. Briefly, solution A was prepared by dissolving NaOH (1.500 g, 99%, Merck, Darmstadt, Germany) and sodium aluminate (2.693 g, 53.0% Al 2 O 3 , 42.5% Na 2 O, Sigma-Aldrich, Malaysia) in distilled water (13.000 g).…”

Section: Methodsmentioning

confidence: 99%

“…Previously, we reported that the nanosized zeolite NaY could improve the deoxygenation performance of triolein in the absence of a hydrogen source [ 39 ]. In this study, we extend the utilization of nanosized zeolite NaY by loading with NiO nanoparticles prepared using different synthesis methods.…”

Section: Introductionmentioning

confidence: 99%

Deposition of NiO Nanoparticles on Nanosized Zeolite NaY for Production of Biofuel via Hydrogen-Free Deoxygenation

Choo

Daou

et al. 2020

Materials

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Nickel-based catalysts play an important role in the hydrogen-free deoxygenation for the production of biofuel. The yield and quality of the biofuel are critically affected by the physicochemical properties of NiO supported on nanosized zeolite Y (Y65, crystal size of 65 nm). Therefore, 10 wt% NiO supported on Y65 synthesized by using impregnation (IM) and deposition–precipitation (DP) methods were investigated. It was found that preparation methods have a significant effect on the deoxygenation of triolein. The initial rate of the DP method (14.8 goil·h−1) was 1.5 times higher than that of the IM method (9.6 goil·h−1). The DP-Y65 showed the best deoxygenation performance with a 80.0% conversion and a diesel selectivity of 93.7% at 380 °C within 1 h. The outstanding performance from the DP method was due to the smaller NiO particle size (3.57 ± 0.40 nm), high accessibility (H.F value of 0.084), and a higher Brönsted to Lewis acidity (B/L) ratio (0.29), which has improved the accessibility and deoxygenation ability of the catalyst. The NH4+ released from the decomposition of the urea during the DP process increased the B/L ratio of zeolite NaY. As a result, the pretreatment to convert Na-zeolite to H-zeolite in a conventional zeolite synthesis can be avoided. In this regard, the DP method offers a one-pot synthesis to produce smaller NiO-supported nanosized zeolite NaY with a high B/L ratio, and it managed to produce a higher yield with selectivity towards green diesel via deoxygenation under a hydrogen-free condition.

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“…In fact, this is not surprising because most of the accessible basic sites, namely [Si-O-Al] − K + , are located at the external surfaces of the zeolite particles. As a result, K-MER zeolite with smaller crystallite size exhibited a larger number of basic sites [38]. In addition, the low Si/Al ratio of the zeolite framework also contributed to the basicity of K-MER zeolite because when the Si/Al ratio is low, more K + cations are needed by the zeolite for surface charge counter-balance, which leads to the enhancement of zeolite basicity.…”

Section: Morphological Effects On the Catalytic Behavior Of K-mer Zeomentioning

confidence: 99%

Effects of Synthesis Parameters on Crystallization Behavior of K-MER Zeolite and Its Morphological Properties on Catalytic Cyanoethylation Reaction

et al. 2020

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MER-type zeolite is an interesting microporous material that has been widely used in catalysis and separation. By carefully controlling the synthesis parameters, a procedure to synthesize K-MER zeolite crystals with various morphologies has been developed. The silica, water and mineralizer content in the synthesis gel, as well as crystallization time and temperature, have a profound impact on the crystallization kinetics, resulting in zeolite solids with various degrees of crystallinity, crystal sizes and shapes. K-MER zeolite crystals with nanorod, bullet-like, prismatic and wheatsheaf-like morphologies have been successfully obtained. The catalytic performances of the K-MER zeolites in cyanoethylation of methanol, under novel non-microwave instant heating, have been investigated. The zeolite in nanosize form shows the best catalytic performance (94.1% conversion, 100% selectivity) while the bullet-like zeolite gives poorest catalytic performance (44.2% conversion, 100% selectivity).

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The role of nanosized zeolite Y in the H₂-free catalytic deoxygenation of triolein

Abstract: The reduction in zeolite Y crystal size has improved the triolein conversion, yield of deoxygenated product and diesel range hydrocarbon selectivity.

Cited by 39 publications

References 66 publications

Mesoporous Zeolitic Materials (MZMs) Derived From Zeolite Y Using a Microwave Method for Catalysis

Mesoporous Zeolitic Materials (MZMs) Derived From Zeolite Y Using a Microwave Method for Catalysis

Deposition of NiO Nanoparticles on Nanosized Zeolite NaY for Production of Biofuel via Hydrogen-Free Deoxygenation

Effects of Synthesis Parameters on Crystallization Behavior of K-MER Zeolite and Its Morphological Properties on Catalytic Cyanoethylation Reaction

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The role of nanosized zeolite Y in the H2-free catalytic deoxygenation of triolein

Abstract: The reduction in zeolite Y crystal size has improved the triolein conversion, yield of deoxygenated product and diesel range hydrocarbon selectivity.

Cited by 39 publications

References 66 publications

Mesoporous Zeolitic Materials (MZMs) Derived From Zeolite Y Using a Microwave Method for Catalysis

Mesoporous Zeolitic Materials (MZMs) Derived From Zeolite Y Using a Microwave Method for Catalysis

Deposition of NiO Nanoparticles on Nanosized Zeolite NaY for Production of Biofuel via Hydrogen-Free Deoxygenation

Effects of Synthesis Parameters on Crystallization Behavior of K-MER Zeolite and Its Morphological Properties on Catalytic Cyanoethylation Reaction

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The role of nanosized zeolite Y in the H₂-free catalytic deoxygenation of triolein