Calcination temperature induced structural change of red mud and its enhanced catalytic performance for hydrocarbon-based biofuels production

Wang, Qi; Chen, Jinlei; Li, Xingyong; Yang, Xinyu; Wu, Yankun; Li, Shuirong; Ye, Yueyuan; Wang, Duo; Wang, Dechao; Zheng, Zhifeng

doi:10.1016/j.fuproc.2022.107316

Cited by 25 publications

(1 citation statement)

References 66 publications

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“…This decrease may be attributed to the higher calcination temperature, accelerating CaO sintering. Wang et al [48] also found that an increase in calcination temperature leads to the sintering and aggregation of metal oxide particles. Furthermore, Ma et al [49] determined that excessively high calcination temperatures significantly decrease the surface area and pore volume of the catalyst while simultaneously forming metal clusters, leading to a deterioration in catalyst performance.…”

Section: Calcination Temperaturementioning

confidence: 97%

Investigating the Catalytic Influence of Boron on Ni-Co/Ca Catalysts for Improved Syngas Generation from Rice Straw Pyrolysis

Wang,

2024

Molecules

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A series of boron-promoted Ni-Co/Ca catalysts were synthesized by the sol–gel method to enhance syngas generation from biomass pyrolysis. The efficiency of these catalysts was evaluated during the pyrolysis of rice straw in a fixed-bed reactor, varying the Ni/Co ratio, boron addition, calcination temperature, and residence time. The catalysts underwent comprehensive characterization using X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) analysis, scanning electron microscopy (SEM), and hydrogen temperature-programmed reduction (H2-TPR). The results indicated that the Ni-Co/Ca catalysts yielded superior syngas compared to singular Ni or Co catalysts, suggesting a synergistic interplay between nickel and cobalt. The incorporation of 4% boron significantly decreased the particle size of the active metals, enhancing both the catalytic activity and stability. Optimal syngas production was achieved under the following conditions: a biomass-to-catalyst mass ratio of 2:1, a Ni-Co ratio of 1:1, a calcination temperature of 400 °C, a pyrolysis temperature of 800 °C, and a 20 min residence time. These conditions led to a syngas yield of 431.8 mL/g, a 131.28% increase over the non-catalytic pyrolysis yield of 188.6 mL/g. This study not only demonstrates the potential of Ni-Co/Ca catalysts in biomass pyrolysis for syngas production but also provides a foundation for future catalyst performance optimization.

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Section: Calcination Temperaturementioning

confidence: 97%

Investigating the Catalytic Influence of Boron on Ni-Co/Ca Catalysts for Improved Syngas Generation from Rice Straw Pyrolysis

Wang,

2024

Molecules

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Hydrogenation of CO₂ into Value‐added Chemicals Using Solid‐Supported Catalysts

Aktary,

Alghamdi,

Ajeebi

et al. 2024

Chemistry An Asian Journal

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Reducing CO2 emissions is an urgent global priority. In this context, several mitigation strategies, including CO2 tax and stringent legislation, have been adopted to halt the deterioration of the natural environment. Also, carbon recycling procedures undoubtedly help reduce net emissions into the atmosphere, enhancing sustainability. Utilizing Earth’s abundant CO2 for the production of high‐value chemicals and fuels opens new avenues for the chemical industry. In this context, much effort has been devoted to converting CO2 as a feedstock into various value‐added chemicals, such as CH4, lower olefins, methanol, gasoline, and long‐chain hydrocarbons, for numerous applications involving various catalytic reactions. Although several CO2‐conversion methods have been used, including electrochemical, photochemical, and biological approaches, the hydrogenation method allows the reaction to be tuned to produce the targeted compound without significantly altering infrastructure. This review discusses the numerous hydrogenation routes and their challenges, such as catalyst design, operation, and the combined art of structure–activity relationships for the various product formations.

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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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Calcination temperature induced structural change of red mud and its enhanced catalytic performance for hydrocarbon-based biofuels production

Cited by 25 publications

References 66 publications

Investigating the Catalytic Influence of Boron on Ni-Co/Ca Catalysts for Improved Syngas Generation from Rice Straw Pyrolysis

Investigating the Catalytic Influence of Boron on Ni-Co/Ca Catalysts for Improved Syngas Generation from Rice Straw Pyrolysis

Hydrogenation of CO₂ into Value‐added Chemicals Using Solid‐Supported Catalysts

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

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Calcination temperature induced structural change of red mud and its enhanced catalytic performance for hydrocarbon-based biofuels production

Cited by 25 publications

References 66 publications

Investigating the Catalytic Influence of Boron on Ni-Co/Ca Catalysts for Improved Syngas Generation from Rice Straw Pyrolysis

Investigating the Catalytic Influence of Boron on Ni-Co/Ca Catalysts for Improved Syngas Generation from Rice Straw Pyrolysis

Hydrogenation of CO2 into Value‐added Chemicals Using Solid‐Supported Catalysts

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

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Product

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Hydrogenation of CO₂ into Value‐added Chemicals Using Solid‐Supported Catalysts