Activity features of catalysts for thermocatalytic hydrogenation processing of polymer waste DOI Creative Commons

Zheneta Kh. Tashmukhambetova,

Tanakoz O. Kalamgali, Yermek Aubakirov

et al.

Chimica Techno Acta, Journal Year: 2022, Volume and Issue: 9(3)

Published: July 5, 2022

The aim of this study was to obtain new catalysts for the processing carbon-containing polymer waste based on polyethylene and polypropylene, represented mostly by lids from beverages bottled in plastic containers, which accumulate huge quantities landfills, method thermocatalytic hydrogenation into liquid fuels other products. process carried out presence fuel oil as a binder, source hydrogen additional hydrocarbons. Thus, two tasks can be solved simultaneously: recycling obtaining alternative raw materials order save resources improve environmental situation general. New activated zeolite modified with Mo(VI) W(VI) salts various concentrations plastics motor were synthesized. composition, structure, morphology adsorption properties determined different physicochemical methods. suitability obtained use determined. tested during mixture polyethylene-polypropylene: paste-forming agent (fuel oil) at T=450 °C pressure 0.6 MPa. individual group composition gasoline, diesel gas fractions chromatography coupled mass spectrometry. maximum yield gasoline fraction (16.9 wt.%) (39.31 2%W(VI)/diatomite catalyst.

Language: Английский

A critical review on the role of carbon supports of metal catalysts for selective catalytic hydrogenation of chloronitrobenzenes DOI Open Access
Ajit Das, Sourav Mondal, Kamala Mandy Hansda

et al.

Applied Catalysis A General, Journal Year: 2022, Volume and Issue: 649, P. 118955 - 118955

Published: Nov. 10, 2022

Language: Английский

Citations

42
Role of Acetylene in the Chemical Evolution of Carbon Complexity DOI
Evgeniy O. Pentsak, M. S. Murga, Valentine P. Ananikov

et al.

ACS Earth and Space Chemistry, Journal Year: 2024, Volume and Issue: 8(5), P. 798 - 856

Published: April 12, 2024

Acetylene, among the multitude of organic molecules discovered in space, plays a distinct role genesis matter. Characterized by its unique balance stability and reactivity, acetylene is simplest unsaturated molecule known to have triple bond. In addition inherent chemical properties, one most prevalent found across Universe, spanning from icy surfaces planets satellites cold interstellar medium with low temperatures hot circumstellar envelopes where surge several thousand kelvins. These factors collectively position as crucial building block molecular diversification solids present space. This review comprehensively discusses formation expansion carbon skeletons involving acetylene, ranging simple origination first aromatic ring ultimately nanosized particles. Mechanisms pertinent both environments, such envelopes, including clouds planetary atmospheres, are explored. addition, this contemplates synthesis prebiotic molecules. A focus accorded recent advancements future prospects research into catalytic processes molecules, which significant instrument driving evolution complexity Universe. The insights garnered underscore significance astrochemistry potentially contribute our understanding

Language: Английский

Citations

10
Palladium catalysts on porous cobalt-carbon composite materials derived from PVC for n-pentanal hydrogenation DOI

Yu. A. Chumachenko,

Elina R. Saybulina,

И. В. Муромцев

et al.

Research on Chemical Intermediates, Journal Year: 2025, Volume and Issue: unknown

Published: April 5, 2025

Language: Английский

Citations

0
The phenomenon of “dead” metal in heterogeneous catalysis: opportunities for increasing the efficiency of carbon-supported metal catalysts DOI Creative Commons
R. M. Mironenko, Dmitry B. Eremin, Valentine P. Ananikov

et al.

Chemical Science, Journal Year: 2023, Volume and Issue: 14(48), P. 14062 - 14073

Published: Jan. 1, 2023

This review addresses the largely overlooked yet critical issue of "dead" metal in heterogeneous catalysts. "Dead" refers to fraction a catalyst that remains inaccessible reactants, significantly reducing overall performance. As representative example considered detail here, this challenge is particularly relevant for carbon-supported catalysts, extensively employed research and industrial settings. We explore key factors contributing formation metal, including morphology support, atom intercalation within support layers, encapsulation nanoparticles, interference by organic molecules during preparation, dynamic behavior under microwave irradiation. Notably, outlines series strategic approaches mitigate occurrence thus boosting efficiency. The knowledge gathered important enhancing preparation especially those containing precious metals. Beyond practical implications design, study introduces novel perspective understanding optimizing insights are expected broadly impact different scientific disciplines, empowered with catalysis driving innovation energy, environmental science, materials chemistry, among others. Exploring phenomenon potential mitigation strategies brings field closer ultimate goal high-efficiency, low-cost catalysis.

Language: Английский

Citations

7
Aqueous-Phase Hydrogenation of Furfural in the Presence of Supported Metal Catalysts of Different Types. A Review DOI
R. M. Mironenko, O. B. Belskaya, В. А. Лихолобов

et al.

Doklady Physical Chemistry, Journal Year: 2023, Volume and Issue: 509(1), P. 33 - 50

Published: March 1, 2023

Language: Английский

Citations

5
Hard carbon as anode material for metal-ion batteries DOI

E. N. Abramova,

Zoya V. Bobyleva, Oleg A. Drozhzhin

et al.

Russian Chemical Reviews, Journal Year: 2023, Volume and Issue: 93(2), P. RCR5100 - RCR5100

Published: Dec. 4, 2023

The development of large-scale energy storage systems based on the mature technology lithium-ion batteries is hampered by high cost lithium. Therefore, analogous technologies other alkali metals (sodium and potassium) are being developed. Among various types negative electrode (anode) materials for such batteries, carbon most promising; in particular, hard interest. present review addresses current state research structure, composition properties this type material gives analysis methods its preparation investigation. Description microstructure a highly ambiguous challenging problem; therefore, pays special attention to microstructural models. In addition, synthesis systematized results studies physicochemical analyzed. correlations between method, characteristics electrochemical metal-ion identified. A large array considered, views mechanisms interactions Na<sup>+</sup> K<sup>+</sup> cations with systematized, currently existing contradictions models interaction shown.<br> Bibliography — 247 references.

Language: Английский

Citations

4
Impact of Oxygen-Containing Groups on Pd/C in the Catalytic Hydrogenation of Acetophenone and Phenylacetylene DOI Open Access
Pengyao You, Li‐Ming Wu, Zhou Lu

et al.

Catalysts, Journal Year: 2024, Volume and Issue: 14(8), P. 545 - 545

Published: Aug. 21, 2024

Pd/C catalysts play a pivotal role in contemporary chemical industries due to their exceptional performance diverse hydrogenation processes and organic reactions. Over the past century, researchers have extensively explored factors influencing catalyst performance, particularly emphasizing impact of oxygen-containing groups through oxidation or reduction modifications. However, most studies use respective analyze catalytic reactions one class bonds (polar non-polar). This study investigates alterations during temperature-programmed (TPR) evaluates activity unsaturated polar (C=O, acetophenone) non-polar (C≡C, phenylacetylene) catalysts. The experimental results indicate that decreases content groups, reducing for acetophenone but increasing it phenylacetylene. research highlights preference regular Pd surfaces bond Pd/oxide sites facilitating hydrogenation. These discoveries offer essential insights into how influence allow us propose potential avenues enhancing design production catalysis.

Language: Английский

Citations

1
Catalysts Based on Ni(Mg)Al-Layered Hydroxides Prepared by Mechanical Activation for Furfural Hydrogenation DOI Open Access
Л. Н. Степанова,

Elena O. Kobzar,

М. В. Тренихин

et al.

Catalysts, Journal Year: 2023, Volume and Issue: 13(3), P. 497 - 497

Published: Feb. 28, 2023

Ni(Mg)Al-layered hydroxides with molar ratios of (Ni + Mg)/Al = 2, 3, 4 and Ni/(Ni Mg) 0.1, 0.3, 0.5, 0.7 were synthesized by mechanochemical activation. It has been proven that the phase composition samples was presented a single hydrotalcite up to 0.5. For first time, catalysts based on prepared route have studied in reaction furfural hydrogenation. The correlation between conversion, selectivity products, established. effect composition, surface morphology, microstructure activity shown XRD, SEM, TEM. found 0.5 highest conversion. Herewith, product can be regulated ratio.

Language: Английский

Citations

3
Selective hydrogenation of α,β-unsaturated aldehydes over Pt supported on cerium–zirconium mixed oxide of different composition DOI
К. В. Виканова, Е. А. Редина, Г. И. Капустин

et al.

Mendeleev Communications, Journal Year: 2022, Volume and Issue: 32(4), P. 488 - 491

Published: July 1, 2022

Language: Английский

Citations

4
Synthesis and Catalytic Activity in the Hydrogenation Reaction of Palladium-Doped Metal-Organic Frameworks Based on Oxo-Centered Zirconium Complexes DOI Open Access
Rose K. Baimuratova,

Anastasia V. Andreeva,

Igor Е. Uflyand

et al.

Journal of Composites Science, Journal Year: 2022, Volume and Issue: 6(10), P. 299 - 299

Published: Oct. 9, 2022

Metal-nanocluster-doped porous composite materials are attracting considerable research attention, due to their specific catalytic performance. Here we report a simple, cheap, and efficient strategy for the preparation of palladium hydrogenation catalysts based on metal-organic frameworks (MOFs). It has been shown that synthesis Pd/MOF results in formation nanoparticles uniformly fixed surface. The composition structure resulting composites were studied using elemental analysis, DSC, TGA, XRD, TEM, IR spectroscopy. Pd with an average diameter 8–12 nm successfully confined UiO-type MOFs, obtained nanocomposites exhibited abundant porosity, high stability, large surface area. systems activity, selectivity, stability reduce phenylacetylene allyl alcohol styrene propanol, respectively, liquid-phase reactions.

Language: Английский

Citations

3