Showing 741 - 760 results of 1,089 for search '"catalyst"', query time: 0.06s Refine Results
  1. 741

    Mixture Design Approach on the Physical Properties of Lignin-Resorcinol-Formaldehyde Xerogels by Chris D. Castro, Germán C. Quintana

    Published 2015-01-01
    “…Bulk density varies from 0.42 to 0.9, shrinkage varies from 3.42 to 25.35, and specific surface area reaches values of 451.86 m2/g with 13% lignin and 270 m2/g with 27% lignin. High catalyst content improves lignin dissolution and increase shrinkage and bulk density of xerogels and bulk density. …”
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  2. 742

    Catalytic Ozonation of Phenolic Wastewater: Identification and Toxicity of Intermediates by Mahdi Farzadkia, Yousef Dadban Shahamat, Simin Nasseri, Amir Hossein Mahvi, Mitra Gholami, Ali Shahryari

    Published 2014-01-01
    “…Magnetic carbon nanocomposite, as a novel catalyst, was synthesized and then used in the catalytic ozonation process (COP) and the effects of operational conditions such as initial pH, reaction time, and initial concentration of phenol on the degradation efficiency and the toxicity assay have been investigated. …”
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  3. 743

    The Synergistic Effect of Nitrogen Dopant and Calcination Temperature on the Visible-Light-Induced Photoactivity of N-Doped TiO2 by Yao-Tung Lin, Chih-Huang Weng, Hui-Jan Hsu, Yu-Hao Lin, Ching-Chang Shiesh

    Published 2013-01-01
    “…The synergistic effect of nitrogen content and calcinations temperature on the N-doped TiO2 catalysts prepared by sol-gel method was investigated. …”
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  4. 744

    The Curing Kinetics of Multiscale [Ni(EDTA)]-2 Intercalated Zn-Al Layered Double Hydroxides: Glass Fiber–Epoxy Composite Prepreg by Reza Darvishi, Mahdi Darvishi, Ali Moshkriz

    Published 2021-01-01
    “…Furthermore, LDH-[Ni(EDTA)]-2 performed better due to the catalyst role of nickel (II). Moreover, the activation energy exhibited lower reliance on the degree of conversion in the cases of GELP and GELNiP rather than pure epoxy prepregs. …”
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  5. 745

    Evaluation of Separate and Simultaneous Kinetic Parameters for Levulinic Acid and Furfural Production from Pretreated Palm Oil Empty Fruit Bunches by Misri Gozan, Jabosar Ronggur Hamonangan Panjaitan, Dewi Tristantini, Rizal Alamsyah, Young Je Yoo

    Published 2018-01-01
    “…The activation energy of LA production (EakHMF) increases with higher acid catalyst concentration, and the activation energy of furfural production (EakXYN) decreases with higher acid concentration. …”
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  6. 746

    Photocatalytic Activity and Characterization of Carbon-Modified Titania for Visible-Light-Active Photodegradation of Nitrogen Oxides by Chun-Hung Huang, Yu-Ming Lin, I-Kai Wang, Chun-Mei Lu

    Published 2012-01-01
    “…Rising the carbon number of alcoholic precursor molecule, the modified titania showed increasing visible activities of NOx photodegradation. The catalyst modified with cyclohexanol exhibited the best activities of 62%, 62%, 59%, and 54% for the total NOx removal under UV, blue, green, and red light irradiation, respectively. …”
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  7. 747

    Sewage sludge as a sustainable feedstock for biodiesel: Advances in conversion technologies and catalytic applications by Christopher Selvam D, Yuvarajan Devarajan, Raja T

    Published 2025-03-01
    “…Furthermore, the incorporation of supported HPAs enhances reaction kinetics, diminishes byproduct formation, and facilitates the reusability of catalysts for 5 to 6 cycles, thereby reducing both costs and environmental repercussions. …”
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  8. 748

    Electrochemical and physical properties of magnesioferrite nanomaterial and photocatalytic degradation of methylene blue by Nolubabalo Matinise, A. Fall

    Published 2025-01-01
    “…Photocatalytic experiments measured the influence of various parameters, including catalyst loading, dye concentration, and pH. The MgFe2O4 nanomaterials exhibited impressive photocatalytic degradation efficiency, achieving an 81% degradation rate at pH 5.0 within 120 min. …”
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  9. 749

    Biodiesel and Biolubricant Production from Waste Cooking Oil: Transesterification Reactor Modeling by Pedro M. Álvarez, Javier Collado Contreras, Sergio Nogales-Delgado

    Published 2025-01-01
    “…Also, a kinetic study was carried out (at temperatures ranging from 80 to 140 °C and with catalyst concentrations from 0.3 to 0.9% <i>w</i>/<i>w</i> and working pressures from 210 to 760 mmHg) to establish the main kinetic parameters, obtaining a second-order reaction and an activation energy of 17.8 kJ·mol<sup>−1</sup>. …”
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  10. 750
  11. 751
  12. 752

    Synthesis of Al-MCM-41@Ag/TiO2 Nanocomposite and Its Photocatalytic Activity for Degradation of Dibenzothiophene by Xuan Nui Pham, Tuan Dat Pham, Ba Manh Nguyen, Hoa Thi Tran, Dinh Trong Pham

    Published 2018-01-01
    “…The photocatalytic activity was evaluated by the photodegradation of dibenzothiophene (DBT) under both UV and visible light irradiation. MCM-41@Ag/TiO2 catalyst exhibited high catalytic activity for the oxidative desulfurization (ODS) of DBT reaching almost 100% conversions at 50°C after 2 h under UV and visible light irradiations. …”
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  13. 753

    Frustrated Lewis pairs on nanoparticles for colloidal catalysis: dream or reality? by Carenco, Sophie

    Published 2024-12-01
    “…Catalysis by the colloidal suspension of nanoparticles has attracted considerable attention in recent years as it may combine interesting features: (i) the possibility of using inorganic catalysts, such as those of transition metal nanoparticles; (ii) the opportunity of adding well-designed ligands, as in homogeneous catalysis, to tune the activity and selectivity of a given reaction. …”
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  14. 754

    Navigating carbon neutrality pathway beyond energy and economic agents: the influence of media liberty across the OECD countries by Umut Uzar, Kemal Eyuboglu, Andrew Adewale Alola

    Published 2025-01-01
    “…Specifically, it demonstrates that press freedom serves as a catalyst for reducing ecological footprint, presenting OECD countries with a unique opportunity for environmental gains and potentially achieving carbon neutrality. …”
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  15. 755

    Experimental investigation into the functionality of alkaline water electrolysis with ion-solvating membrane in anode feed mode using diluted potassium hydroxide by Dieter Jarosch, John James Warren, Jörg Kapischke

    Published 2025-01-01
    “…This stability enables increased current density at a given cell voltage. Effects of catalyst use: Using cathode catalysts with high surface areas, such as Raney-Ni, enhances current density because highly concentrated liquid potassium hydroxide forms at the cathode during operation. …”
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  16. 756

    Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties by Hongyao Zhang

    Published 2022-01-01
    “…Because of its excellent properties, mullite porous ceramics are widely used in thermal insulation materials, catalyst carriers, gas-liquid filtration, separation materials, etc. …”
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  17. 757

    Preparation of NaTaO3 by Spray Pyrolysis and Evaluation of Apparent Photocatalytic Activity for Hydrogen Production from Water by Hyun Woo Kang, Eun-Jung Kim, Seung Bin Park

    Published 2008-01-01
    “…The apparent photocatalytic activity (APA) was defined by the rate of hydrogen production divided by weight of catalyst, volume of reactant mixture, duration of irradiation, and power of UV lamp. …”
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  18. 758

    “Feedback is communication between human beings”: understanding adolescents' conception of written qualitative feedback by Sining Tao, Wenjuan Qin

    Published 2025-02-01
    “…Qualitative findings indicate that learners perceive feedback along a continuum as an instructional tool, evaluative system, cognitive guide, dialogic conversation, and catalyst for personal change. By triangulating quantitative results and qualitative findings, the study demonstrates how personalized educational interaction in the form of written qualitative feedback facilitates adolescents' transition from competent language use to higher-order argumentative skills and agentic approaches to writing development. …”
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  19. 759

    Boosting the synthesis of 3-acetamido-5-acetylfuran from N-acetyl-D-glucosamine: understanding the significant role of homogeneous Cl - by Delong Yang, Jinhang Dai, Ziting Du, Qingya Cao, Gang Chen, Ting Qi, Weilu Wang, Fukun Li

    Published 2025-02-01
    “…The effects of solvent, catalyst dosage, reaction temperature, and reaction time on the synthesis of 3A5AF were investigated. …”
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  20. 760

    Green Synthesis of Silver Nanoparticles Using Catharanthus roseus Flower Extracts and the Determination of Their Antioxidant, Antimicrobial, and Photocatalytic Activity by Mathivathani Kandiah, Kavishadhi N. Chandrasekaran

    Published 2021-01-01
    “…Furthermore, the photocatalytic activity of the synthesized purple flower AgNPs at two different concentrations 5000 ppm and 333 ppm was analyzed by the removal of methyl orange dye from an aqueous solution under sunlight irradiation in the presence of NaBH4 catalyst. Results indicated that 333 ppm purple flower AgNPs exhibited an efficient photocatalytic activity in the degradation of methyl orange compared to 5000 ppm purple flower AgNPs in 20 minutes. …”
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