Study of Nickel Catalysts Prepared From Rice Husk Ash for the Reaction of Methane Reforming With Carbon Dioxide

Zanoteli, Karine; Freitas, Jair C. C.; Silva, Paulo Roberto Nagipe da

doi:10.5935/0100-4042.20140272

Cited by 3 publications

(3 citation statements)

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“…The chemical state of nickel (Ni 2+ or Ni 0 ) was most likely controlled by the reversible reactions and . In the view of RHA Ni recycling, the silica-based nickel could be recycled in various catalytic applications. − …”

Section: Resultsmentioning

confidence: 99%

Catalytic CO₂ Gasification of Rice Husk Char for Syngas and Silica-Based Nickel Nanoparticles Production

Shen

Ding

et al. 2015

Ind. Eng. Chem. Res.

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The nickel-catalyzed CO2 gasification of rice husk char (RHC) was studied. In this work, carbon conversion is studied by thermogravimetric analysis (TGA) and a packed-bed reactor. The key influence parameters including nickel-loading amount and gasification temperature were investigated. In the absence of nickel, the carbon conversion efficiency of 100% was achieved in 40 min at 1000 °C, whereas this time was extended to 130 min at 700 °C. Although the use of high temperatures improved char reactivity, relatively high temperatures can shift the reaction rate toward the pore-diffusion-controlled regime. Also, the addition of nickel catalyst can improve the biochar reactivity by reducing the activation energy, in terms of the improvement of the carbon conversion and its rate. In the view of RHA Ni recycling, the silica-based nickel nanoparticles could be recycled in various catalytic applications.

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Section: Resultsmentioning

confidence: 99%

Catalytic CO₂ Gasification of Rice Husk Char for Syngas and Silica-Based Nickel Nanoparticles Production

Shen

Ding

et al. 2015

Ind. Eng. Chem. Res.

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“…The diffractogram of the pure BAC sample exhibits broad peaks at ca. 23° and 43°, assigned to the (002) and (200) re ections of the turbostratic structure of the carbon matrix (Carreño et al 2002;Li et al 2007;Silva and Rezende 2018;Zanoteli et al 2014). A small peak ascribed to silicon dioxide (SiO 2 ) is also detected at 22.4°, in accordance with Freitas et al (2000), that assigned this peak around 22° and it is a consequence of the natural occurrence of Si-containing compounds in the endocarp of babassu coconut.…”

Section: Structural Characterizationmentioning

confidence: 57%

“…Furthermore, this material exhibits strong ferromagnetic properties at room temperature, which allow the easy separation of the magnetic adsorbent from the aqueous solution after the end of the adsorption process. Finally, it is worth stressing that, although this work is concerned only with the adsorptive properties of the produced hybrids, these materials composed of submicron Ni-containing particles supported on a porous matrix are of potentially high interest for applications in elds such as heterogeneous catalysis and hydrogen storage, among others (Zieliński et al 2007;Careño et al 2002;Zanoteli et al 2014;Li et al 2010;Donald et al 2010).…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Production of an Efficient Magnetic Adsorbent From Babassu Coconut Endocarp and Ni Particles for Easy Dye Removal From Mimetic Contaminated Effluents

Silva¹,

Santos²,

Freitas³

et al. 2021

Preprint

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Ni metal particles, with sizes ranging from 70 to 110 nm, dispersed in activated carbon produced from the babassu coconut endocarp (BAC) were successfully synthesized and evaluated by scanning electron microscopy, dispersive energy X-ray spectroscopy, flame atomic absorption spectroscopy and powder X-ray diffraction. These hybrid BACNi-X materials (where X is the Ni / BAC ratio, equal to 10, 20 or 30) exhibit crystalline Ni particles with suitable magnetic properties, shown by increased saturation magnetization and a gradual reduction in coercive fields (varying 80 to 150 Oe) as the Ni content increases. Relatively large values of pore volume (in the range of 0.28-0.37 cm3/g), specific surface area (560-740 m2/g) are achieved, favoring their applications for magnetic remediation of mimetic contaminated effluents. All hybrid samples were tested positively for the adsorption of methylene blue in contaminated synthetic effluents and the greatest removal was achieved by the hybrid sample BACNi-10, which has the largest specific area and reasonable magnetic properties that allowed the manipulation of the sample by an external field.

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Use of Machine Learning Techniques in the Modeling of an Industrial Reaction System

Silva,

Leite,

Fernandes

et al. 2023

RGSA

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Purpose: The objective of the research is to address the industrial production of hydrogen and develop the modeling and simulation of hydrogen-related industrial reaction systems using Machine Learning techniques. Theoretical Framework: The research explores the innovation and promise of Machine Learning techniques in modeling industrial reaction systems, enabling the creation of flexible and adaptive models to deal with complexities in industrial processes. Method/Design/Approach: The method involves the application of machine learning methods, such as linear regressions and the kriging or Gaussian process method, to develop metamodels that analyze the steps of an industrial reaction involving hydrogen. Results and Conclusion: The results of the training and analysis have achieved satisfactory outcomes, with expected values assessed through constraint parameters for each output variable. Research Implications: The research aims to improve real-time prediction accuracy, process variable control, and early fault detection, resulting in greater sustainability and economic efficiency in the industry. Originality/Value: The values underpinning the research include the promotion of technological innovation, operational efficiency, and environmental sustainability, as well as valuing quality, safety, social responsibility, continuous improvement, global competitiveness, and regulatory compliance in the industry.

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Study of Nickel Catalysts Prepared From Rice Husk Ash for the Reaction of Methane Reforming With Carbon Dioxide

Cited by 3 publications

References 0 publications

Catalytic CO₂ Gasification of Rice Husk Char for Syngas and Silica-Based Nickel Nanoparticles Production

Catalytic CO₂ Gasification of Rice Husk Char for Syngas and Silica-Based Nickel Nanoparticles Production

Production of an Efficient Magnetic Adsorbent From Babassu Coconut Endocarp and Ni Particles for Easy Dye Removal From Mimetic Contaminated Effluents

Use of Machine Learning Techniques in the Modeling of an Industrial Reaction System

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Study of Nickel Catalysts Prepared From Rice Husk Ash for the Reaction of Methane Reforming With Carbon Dioxide

Cited by 3 publications

References 0 publications

Catalytic CO2 Gasification of Rice Husk Char for Syngas and Silica-Based Nickel Nanoparticles Production

Catalytic CO2 Gasification of Rice Husk Char for Syngas and Silica-Based Nickel Nanoparticles Production

Production of an Efficient Magnetic Adsorbent From Babassu Coconut Endocarp and Ni Particles for Easy Dye Removal From Mimetic Contaminated Effluents

Use of Machine Learning Techniques in the Modeling of an Industrial Reaction System

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Catalytic CO₂ Gasification of Rice Husk Char for Syngas and Silica-Based Nickel Nanoparticles Production

Catalytic CO₂ Gasification of Rice Husk Char for Syngas and Silica-Based Nickel Nanoparticles Production