Improved Brønsted to Lewis (B/L) Ratio of Co- and Mo-Impregnated ZSM-5 Catalysts for Palm Oil Conversion to Hydrocarbon-Rich Biofuels

Riyanto, Teguh; Istadi, Istadi; Jongsomjit, Bunjerd; Anggoro, Didi Dwi; Pratama, Aryadita Ayu; Faris, Muhammad Aviv Al

doi:10.3390/catal11111286

Cited by 11 publications

(3 citation statements)

References 44 publications

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“…As reported previously, the ionicity of reducible metal oxides could enhance the L acid sites due to the available orbitals of metal to receive the electrons. [27] It was confirmed by the XANES and XPS results that the majority of ionic reducible Re oxides was appear for the reduced NiRe 0.12 catalyst (See in Table 2 and Table 3). Therefore, it should be remarkably deduced that the addition of Re species into Ni species could boost the distribution of L acid sites.…”

Section: Nh 3 -Tpd and Pyridine-drifts Examinationsmentioning

confidence: 62%

Enhancing the Hydrodeoxygenation and Isomerization using Re Nanoparticles Decorated on Ni/SAPO‐11 Catalysts for Direct Production of Low‐Cold Flow Diesel from Triglycerides

et al. 2023

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The novel bifunctional NiÀ Re supported on bimodal SAPO-11 catalyst was designed for an economically combined process of direct triglycerides hydro-deoxygenation and isomerization into low-cold flow diesel. The catalyst with a Ni to Re molar ratio of 1 : 0.12 exhibited superior performance for diesel production containing large fraction of iso-alkanes in comparison to Ni and Re benchmarks. Comprehensive characterizations revealed that the detection of Ni and Re co-existed with NiO and ReO x on SAPO-11 after the reduction confirmed by XRD, XANES, and XPS analysis gave a large distribution of Lewis acid sites (> 80 %) noticed by Pyridine-DRIFTS measurement. Under investigations of WHSV, reaction temperature, and H 2 pressure, the NiRe 0.12 catalyst contributed a nearly theoretical 77.1 % liquid yield, accompanied by a 18.2 % jet-range and 52.1 % diesel-range yields with a classification for 46.8 % iso-alkanes and 23.5 % normal alkanes yields; whereas, the cold-flow properties of liquid product were in the ranges of winter diesel standard. It was remarkably noticed that the combination effects of Ni and nanosized Re species substantially improved the diesel production comprising iso-alkanes components with proper catalyst lifetime and low carbon deposition attributing to the fabricated active metal species on bimodal SAPO-11 features with large distribution of Lewis acidic sites.

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Section: Nh 3 -Tpd and Pyridine-drifts Examinationsmentioning

confidence: 62%

Enhancing the Hydrodeoxygenation and Isomerization using Re Nanoparticles Decorated on Ni/SAPO‐11 Catalysts for Direct Production of Low‐Cold Flow Diesel from Triglycerides

et al. 2023

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“…According to Kianfar et al (2018), the use of ZSM-5/CaCO3 as a catalytic cracking catalyst improves the production of heavy hydrocarbons by 38.65%. Istadi et al (2021) also found that Ni-Co/HY catalyst supported cracking and deoxygenation mechanisms in the production of biofuels from palm oil reaching a yield of hydrocarbons and oxygenated by 98.46% and 1.54%, respectively. Meanwhile, cracking palm oil using a bifunctional Zn/ZSM-5 catalyst to produce hydrocarbon fuel and oxygen content by 71.78% and 4.07%, respectively, was reported by .…”

Section: Introductionmentioning

confidence: 80%

Bifunctional CaCO3/HY Catalyst in the Simultaneous Cracking-Deoxygenation of Palm Oil to Diesel-Range Hydrocarbons

Febriansyar

Riyanto

Istadi

et al. 2022

Indonesian J. Sci. Technol

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Palm oil is a promising raw material for biofuel production using the simultaneous catalytic mechanism of the bifunctional cracking-deoxygenation reactions. Through the cracking-deoxygenation process, the chains of palmitic acid and oleic acid in the palm oil were converted to diesel-range hydrocarbons. The combination effects of CaCO3 and HY zeolite enhanced the bifunctional catalytic cracking-deoxygenation of palm oil into biofuel, because of the increasing acid and basic sites in the catalysts due to the synergistic roles of CaCO3 and HY. The introduction of CaCO3 on HY zeolite generated both a strong acid and strong basic sites simultaneously on the designed catalyst, which supports the bifunctional mechanisms of hybrid cracking-deoxygenation, respectively. The CaCO3 impregnated on the HY catalyst has a synergistic and bifunctional effect on the catalyst supporting cracking-deoxygenation reaction mechanisms as mentioned previously. The deoxygenation reaction required the bifunctional strong acid and strong basic sites on the CaCO3/HY catalyst through decarboxylation, decarbonylation, and hydrodeoxygenation reaction mechanisms. Meanwhile, the cracking reaction pathway was supported by the strong acid sites generated on the CaCO3/HY catalyst. In other words, the high acidity strength promotes diesel selectivity, whereas the high strength of basicity leads to the deoxygenation reaction.

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“…22 Recently, much research has focused on the ZSM-5-based catalyst in the HDO process. Riyanto et al 23 used Mo/ZSM-5 and Co/ZSM-5 catalysts with various Bro̷ nsted/Lewis acid center ratios to catalyze the HDO of palm oil. They observed that the biofuel yield was enhanced with the rising value of the Bro̷ nsted/Lewis acid center ratios.…”

Section: ■ Introductionmentioning

confidence: 99%

Role of Acid Centers over Ni/ZSM-5 Catalysts for Hydrodeoxygenation of Methyl Laurate to Biojet Fuels

Wang,

Li,

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Acidity of supports always plays a key role in the determination of dispersion and electron density of metal components and then the catalytic behavior of bifunctional catalysts for deoxygenation of biomass-based resources. Herein, Ni/ZSM-5 catalysts with various Si/Al ratios and acidity were synthesized, and the role of acid centers in the deoxygenation of methyl laurate (ML) was discussed. The decreasing Si/Al ratios promote dispersion of Ni due to the anchoring effect of framework Al to nickel species. It also increases the electron density of Ni, which not only benefits the activation of hydrogen but also curbs the cleavage of C−CHO bonds. All of these accelerate ML transformation and preferentially promote the hydrodeoxygenation (HDO) route instead of decarboxylation (DCO 2 ) or decarbonylation ones. The metal centers play a key role in the hydrogenolysis of ML and the hydrogenation of resultant fatty acids, while the acid centers can facilitate these processes. Besides, suitable acidity of the catalyst would increase selectivity to target alkanes and isomerized ones for biojet fuels by enhancing the HDO routes. However, excessive acid centers favor cracking reactions, reducing the selectivity of target products. This work contributes a profound understanding of the role of acid centers in the deoxygenation of ML into biojet fuels and can be extended to other bifunctional deoxygenation catalysts.

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Improved Brønsted to Lewis (B/L) Ratio of Co- and Mo-Impregnated ZSM-5 Catalysts for Palm Oil Conversion to Hydrocarbon-Rich Biofuels

Cited by 11 publications

References 44 publications

Enhancing the Hydrodeoxygenation and Isomerization using Re Nanoparticles Decorated on Ni/SAPO‐11 Catalysts for Direct Production of Low‐Cold Flow Diesel from Triglycerides

Enhancing the Hydrodeoxygenation and Isomerization using Re Nanoparticles Decorated on Ni/SAPO‐11 Catalysts for Direct Production of Low‐Cold Flow Diesel from Triglycerides

Bifunctional CaCO3/HY Catalyst in the Simultaneous Cracking-Deoxygenation of Palm Oil to Diesel-Range Hydrocarbons

Role of Acid Centers over Ni/ZSM-5 Catalysts for Hydrodeoxygenation of Methyl Laurate to Biojet Fuels

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