Insights into the influence of Pd loading on CeO2 catalysts for CO2 hydrogenation to methanol

Pothu, Ramyakrishna; Mitta, Harisekhar; Banerjee, Prasun; Boddula, Rajender; Srivastava, Rajesh K.; Kalambate, Pramod K.; Naik, Ramachandra; Radwan, A. Bahgat; Al‐Qahtani, Noora

doi:10.1016/j.mset.2023.04.006

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…Converting carbon dioxide into methanol determined that bimetallic systems combined with porous supports, such as zeolite and activated carbon, had a greater efficiency when compared to unsupported materials. Hydrogenation at different temperatures was carried out in a stainless-steel-packed bed reactor for the conversion to methanol, which indeed reduced the environmental emissions of carbon dioxide emissions [158].…”

Section: Copper-based Nanomaterials In Carbon Dioxide Reductionmentioning

confidence: 99%

Recent Advances in Copper-Based Materials for Sustainable Environmental Applications

Bonthula,

Pothu

et al. 2023

Sustainable Chemistry

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In recent years, copper-based nanomaterials have gained significant attention for their practical applications due to their cost-effectiveness, thermal stability, selectivity, high activity, and wide availability. This review focuses on the synthesis and extensive applications of copper nanomaterials in environmental catalysis, addressing knowledge gaps in pollution management. It highlights recent advancements in using copper-based nanomaterials for the remediation of heavy metals, organic pollutants, pharmaceuticals, and other contaminants. Also, it will be helpful to young researchers in improving the suitability of implementing copper-based nanomaterials correctly to establish and achieve sustainable goals for environmental remediation.

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Section: Copper-based Nanomaterials In Carbon Dioxide Reductionmentioning

confidence: 99%

Recent Advances in Copper-Based Materials for Sustainable Environmental Applications

Bonthula,

Pothu

et al. 2023

Sustainable Chemistry

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“…Nevertheless, heterogeneous catalysts are preferred due to their easy separation and recyclability. They are usually based on noble metals (Pt [ 17 , 18 ], Pd [ 19 , 20 ], Au [ 21 ], Ru [ 22 ], Ir [ 23 ]) supported on a variety of materials exhibiting considerably high surface area. It has been observed that the strength of the interaction between the support and the noble metal catalyst produces good conversions; however, there are still issues associated with selectivity.…”

Section: Introductionmentioning

confidence: 99%

Design and Synthesis of N-Doped Carbons as Efficient Metal-Free Catalysts in the Hydrogenation of 1-Chloro-4-Nitrobenzene

Villora-Picó,

Sepúlveda-Escribano,

Pastor-Blas

2024

IJMS

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Metal-free catalysts based on nitrogen-doped porous carbons were designed and synthesized from mixtures of melamine as nitrogen and carbon sources and calcium citrate as carbon source and porogen system. Considering the physicochemical and textural properties of the prepared carbons, a melamine/citrate ratio of 2:1 was selected to study the effect of the pyrolysis temperature. It was observed that a minimum pyrolysis temperature of 750 °C is required to obtain a carbonaceous structure. However, although there is a decrease in the nitrogen amount at higher pyrolysis temperatures, a gradual development of the porosity is produced from 750 °C to 850 °C. Above that temperature, a deterioration of the carbon porous structure is produced. All the prepared carbon materials, with no need for a further activation treatment, were active in the hydrogenation reaction of 1-chloro-4-nitrobenzene. A full degree of conversion was reached with the most active catalysts obtained from 2:1 melamine/citrate mixtures pyrolyzed at 850 °C and 900 °C, which exhibited a suitable compromise between the N-doping level and developed mesoporosity that facilitates the access of the reactants to the catalytic sites. What is more, all the materials showed 100% selectivity for the hydrogenation of the nitro group to form the corresponding chloro-aniline.

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“…The methanol-to-aromatics (MTA) process, as an important non-petroleum conversion route to produce aromatics, is of great strategic significance for optimizing the utilization of carbon-containing resources such as coal, natural gas, and biomass and alleviating petroleum shortages [1,2]. In the MTA reaction process, it is generally believed that the methanol conversion route involves the dehydration of methanol on the catalyst, followed by the formation of olefins via a direct or indirect mechanism, and then further conversion of olefins to aromatics [3].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Water Co-Feeding on the Catalytic Performance of Zn/HZSM-5 in Ethylene Aromatization Reactions

Shao,

Feng,

et al. 2024

IJMS

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During the methanol-to-aromatics (MTA) process, a large amount of water is generated, while the influence and mechanism of water on the activity and selectivity of the light olefin aromatization reaction are still unclear. Therefore, a study was conducted to systematically investigate the effects of water on the reactivity and the product distribution in ethylene aromatization using infrared spectroscopy (IR), intelligent gravitation analyzer (IGA), and X-ray absorption fine structure (XAFS) characterizations. The results demonstrated that the presence of water reduced ethylene conversion and aromatic selectivity while increasing hydrogen selectivity at the same contact time. This indicated that water had an effect on the reaction pathway by promoting the dehydrogenation reaction and suppressing the hydrogen transfer reaction. A detailed analysis using linear combination fitting (LCF) of Zn K-edge X-ray absorption near-edge spectroscopy (XANES) on Zn/HZSM-5 catalysts showed significant variations in the state of existence and the distribution of Zn species on the deactivated catalysts, depending on different reaction atmospheres and water contents. The presence of water strongly hindered the conversion of ZnOH+ species, which served as the active centers for the dehydrogenation reaction, to ZnO on the catalyst. As a result, the dehydrogenation activity remained high in the presence of water. This study using IR and IGA techniques revealed that water on the Zn/HZSM-5 catalyst inhibited the adsorption of ethylene on the zeolite, resulting in a noticeable decrease in ethylene conversion and a decrease in aromatic selectivity. These findings contribute to a deeper understanding of the aromatization reaction process and provide data support for the design of efficient aromatization catalysts.

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Insights into the influence of Pd loading on CeO2 catalysts for CO2 hydrogenation to methanol

Cited by 5 publications

References 31 publications

Recent Advances in Copper-Based Materials for Sustainable Environmental Applications

Recent Advances in Copper-Based Materials for Sustainable Environmental Applications

Design and Synthesis of N-Doped Carbons as Efficient Metal-Free Catalysts in the Hydrogenation of 1-Chloro-4-Nitrobenzene

The Effect of Water Co-Feeding on the Catalytic Performance of Zn/HZSM-5 in Ethylene Aromatization Reactions

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