Catalytic Oxidation of Acetone over MnOx-SiO2 Catalysts: An Effective Approach to Valorize Rice Husk Waste DOI Open Access
Mauricio Cardoso, Patrice Portugau, Carolina De Los Santos

и другие.

Materials, Год журнала: 2024, Номер 17(24), С. 6069 - 6069

Опубликована: Дек. 12, 2024

Rice husk, a byproduct of rice production, poses significant environmental challenges due to disposal issues, while the emission volatile organic compounds into atmosphere further exacerbates these concerns. This study addresses both problems by exploring potential texturally enhanced SiO2, derived from Uruguayan as catalytic support for manganese oxides in combustion compounds. SiO2 was synthesized husk ash using sustainable, acid-free pretreatment method, yielding notably high silica purity 96.5%—a level comparable or exceeding previously reported values, highlighting quality inherent husk. The activity evaluated acetone model compound, achieving up 90% conversion with 30 wt.% oxide at 300 °C, CO2 primary product. Furthermore, 24 h stability test demonstrated consistent performance, maintaining rate around 95.6 ± 2.5%. These findings suggest that high-purity its sustainability benefits, offers an effective solution removal when supporting active phase such oxides, addressing and compound emissions.

Язык: Английский

Catalytic Ozonation of Ethyl Acetate with Assistance of MMn2O4 (M = Cu, Co, Ni and Mg) Catalysts through In Situ DRIFTS Experiments and Density Functional Theory Calculations DOI Open Access
Yulin Sun, Peixi Liu, Yiwei Zhang

и другие.

Catalysts, Год журнала: 2023, Номер 13(12), С. 1491 - 1491

Опубликована: Дек. 2, 2023

Catalytic ozonation, with enhanced efficiency and reduced byproduct formation at lower temperatures, proved to be efficient in ethyl acetate (EA) degradation. In this work, MMn2O4 (M = Cu, Co, Ni, Mg) catalysts were prepared via a redox-precipitation method explore the catalytic ozonation mechanism of EA. Among all catalysts, CuMn exhibited superior activity 120 °C, achieving nearly 100% EA conversion above 90% CO2 selectivity an O3/EA molar ratio 10. Many characterizations conducted, such as SEM, BET XPS, for revealing properties catalysts. Plentiful active sites, abundant oxygen vacancies, more acid sites higher reduction ability contributed excellent performance CuMn. Moreover, addition NO induced degree inhibition due its competition ozone. H2O had little effect on CuMn, could reach stable platform ~89% even 5.0 vol.% H2O. The presence SO2 usually caused catalyst deactivation. However, gradually recover once was discontinued reactivation A detailed reaction proposed situ DRIFTS measurements DFT calculations.

Язык: Английский

Процитировано

1
Catalytic Activity and Mechanical Stability of ZIFs‐Derived CoCeOx/Cordierite Monolithic Catalysts DOI
F. Zhang, Heng Zhang, Dongfang Wu

и другие.

ChemistrySelect, Год журнала: 2024, Номер 9(22)

Опубликована: Июнь 6, 2024

Abstract Bimetallic oxide catalysts derived from zeolitic imidazolate frameworks (ZIFs) have good catalytic oxidation activity, but their application is limited because the powder not conducive to industrial production. In this study, CoCeO x /cordierite monolithic ZIFs were prepared by a simple impregnation method. Firstly, phase transition of Co‐ZIF was induced in ethanol solution adding excessive Ce(NO 3 ) . Subsequently, tannic acid (TA) used chelate excess metal on surface expose more active sites. Meanwhile, TA staying precursor could also prevent accumulation Ce at high temperatures. After activity test, showed excellent for o ‐xylene with T 90 295 °C. The mechanical stability catalyst tested ultrasonic vibration addition, we investigated influence factors such as cycles and treatment time physical chemical properties. This paper provides new idea preparing ZIFs.

Язык: Английский

Процитировано

0
Simultaneous nitric oxide and toluene reduction over Pt-based catalyst DOI Creative Commons

Cheonwoo Jeong,

D. Lee,

Sungjoong Kim

и другие.

Heliyon, Год журнала: 2024, Номер 10(23), С. e40625 - e40625

Опубликована: Ноя. 21, 2024

Язык: Английский

Процитировано

0
Catalytic Oxidation of Acetone over MnOx-SiO2 Catalysts: An Effective Approach to Valorize Rice Husk Waste DOI Open Access
Mauricio Cardoso, Patrice Portugau, Carolina De Los Santos

и другие.

Materials, Год журнала: 2024, Номер 17(24), С. 6069 - 6069

Опубликована: Дек. 12, 2024

Rice husk, a byproduct of rice production, poses significant environmental challenges due to disposal issues, while the emission volatile organic compounds into atmosphere further exacerbates these concerns. This study addresses both problems by exploring potential texturally enhanced SiO2, derived from Uruguayan as catalytic support for manganese oxides in combustion compounds. SiO2 was synthesized husk ash using sustainable, acid-free pretreatment method, yielding notably high silica purity 96.5%—a level comparable or exceeding previously reported values, highlighting quality inherent husk. The activity evaluated acetone model compound, achieving up 90% conversion with 30 wt.% oxide at 300 °C, CO2 primary product. Furthermore, 24 h stability test demonstrated consistent performance, maintaining rate around 95.6 ± 2.5%. These findings suggest that high-purity its sustainability benefits, offers an effective solution removal when supporting active phase such oxides, addressing and compound emissions.

Язык: Английский

Процитировано

0