Showing 401 - 420 results of 1,089 for search '"catalyst"', query time: 0.04s Refine Results
  1. 401

    Effect of Catalytic Gasification of Active Carbon from Plum Stones on its Mesoporous Structure by R. Leboda, W. Grzegorczyk, A. Lodyga, A. Dabrowski

    Published 1993-03-01
    “…The possibilities of the development of a mesoporous structure during gasification of carbonaceous material with water vapour in the presence of a calcium(II) catalyst are demonstrated. Investigations have been carried out on active carbon prepared from plum stones. …”
    Get full text
    Article
  2. 402

    Ni-catalysed acceptorless dehydrogenative aromatisation of cyclohexanones enabled by concerted catalysis specific to supported nanoparticles by Takehiro Matsuyama, Takafumi Yatabe, Tomohiro Yabe, Kazuya Yamaguchi

    Published 2025-02-01
    “…Here, we report a CeO2-supported Ni(0) nanoparticle catalyst for acceptorless dehydrogenative aromatisation of cyclohexanone derivatives. …”
    Get full text
    Article
  3. 403

    Properties and Biodegradability of Thermoplastic Starch Obtained from Granular Starches Grafted with Polycaprolactone by Z. B. Cuevas-Carballo, S. Duarte-Aranda, G. Canché-Escamilla

    Published 2017-01-01
    “…Granular starches grafted with polycaprolactone (St-g-PCL) were obtained using N-methylimidazole (NMI) as a catalyst. The effect of the starch/monomer ratio and catalyst content was studied to obtain different levels of grafted PCL. …”
    Get full text
    Article
  4. 404

    Photodegradation of Methylene Blue Using Carbon-Doped ZnSn(OH)6 Composite Coated on Membrane by Ernso Fenelon, Achmad Chusnun Ni’am, Truc-Mai Thi Nguyen, Ying-Fu Lin, Ya-Fen Wang, Sheng-Jie You

    Published 2023-01-01
    “…In this study, the photocatalytic technology and membrane module were combined to improve the surface distribution of the active species of the catalyst for better degradation of the methylene blue (MB) dye under visible light. …”
    Get full text
    Article
  5. 405

    Comparison of CaO-NPs and Chicken Eggshell-Derived CaO in the Production of Biodiesel from Schinziophyton rautanenii (Mongongo) Nut Oil by Keene Carlvin Mmusi, Sebusi Odisitse, Florence Nareetsile

    Published 2021-01-01
    “…However, in terms of catalyst loading, the eggshell was a better catalyst as it required a low catalyst load to obtain an optimum yield of 83% at 6 wt.% compared to CaO-NPs with an optimum yield of 85% at 12 wt.%. …”
    Get full text
    Article
  6. 406

    An Efficient One-Pot Synthesis of 1,8-Dioxodecahydroacridines Using Silica-Supported Polyphosphoric Acid (PPA-SiO2) under Solvent-Free Conditions by Farid Moeinpour, Amir Khojastehnezhad

    Published 2012-01-01
    “…The catalyst was separated by simple filtration and used in the reaction three times without any significant loss of its activity.…”
    Get full text
    Article
  7. 407

    Full N,N-Methylation of 4,4′-Methylenedianiline with Dimethyl Carbonate: A Feasible Access to 4,4′-Methylene bis(N,N-Dimethylaniline) by Zegang Qiu, Kunjie Wang, Zhiqin Li, Tao Li, Jinhao Bai, Chanjuan Yin, Xiushen Ye, Haining Liu

    Published 2018-01-01
    “…The yield of the major product 4,4′-methylene bis(N,N-dimethylaniline) (MBDMA) reached as high as 97% over NaY catalyst at 190°C for 6 h. The catalyst could be used for two more times with acceptable MBDMA yields higher than 90%. …”
    Get full text
    Article
  8. 408

    Diffusion-programmed catalysis in nanoporous material by Suvendu Panda, Tanmoy Maity, Susmita Sarkar, Arun Kumar Manna, Jagannath Mondal, Ritesh Haldar

    Published 2025-02-01
    “…Consequently, the chemical functionality of the catalysts typically governs turnover frequency and geometric selectivity. …”
    Get full text
    Article
  9. 409

    Effect of MnOx/α-Fe2O3 Prepared from Goethite on Selective Catalytic Reduction of NO with NH3 by Huimin Zhou, Lili Qian, Ting Cheng, Bo Du, Fengjie Xia, Chengzhu Zhu

    Published 2022-01-01
    “…A low-cost goethite and manganese acetate were used to prepare a MnOx/α-Fe2O3 composite catalyst by simple impregnation method for novel high-efficiency selective catalytic reduction (SCR) of NO with NH3, and its denitration performance of composite catalyst under different conditions was investigated in a thermal fixed-bed catalytic reaction system. …”
    Get full text
    Article
  10. 410

    Investigation of the Characteristic Properties of Glacial Acetic Acid-Catalyzed Carbon Xerogels and Their Electrochemical Performance for Use as Electrode Materials in Electrical D... by Nguyen Khanh Nguyen Quach, Wein-Duo Yang, Zen-Ja Chung, Hoai Lam Tran, Rui Liu

    Published 2017-01-01
    “…Glacial acetic acid was used as a catalyst in the preparation process of carbon xerogels from the condensation of resorcinol and formaldehyde for shortening significantly the gelation time. …”
    Get full text
    Article
  11. 411

    Photocatalytic Degradation of Aniline Using TiO2 Nanoparticles in a Vertical Circulating Photocatalytic Reactor by F. Shahrezaei, Y. Mansouri, A. A. L. Zinatizadeh, A. Akhbari

    Published 2012-01-01
    “…Besides, the effect of temperature on aniline photo degradation was found to be unremarkable in the range of 293–313 K. The optimum catalyst concentration was about 60 mg/L. The Langmuir Hinshelwood kinetic model could successfully elucidate the effects of the catalyst concentration, pH, and temperature on the rate of heterogeneous photooxidation of aniline. …”
    Get full text
    Article
  12. 412

    HETEROGENEOUS CATALYSIS USING BENTONITE-SUPPORTED Fe-Co-Ni TRIMETALLIC NANOPARTICLES by ADERIBIGBE FATAI ALADE, ADEWOYE TUNMISE LATIFAT, MUSTAPHA SHERIF ISHOLA, MOHAMMED ISHAQ ALHASSAN, SAKA HARVIS BAMIDELE, AJALA ELIJAH OLAWALE, OLUWASEYI SOILE SAMUEL

    Published 2022-01-01
    “…The synthesized heterogeneous catalyst was used to investigate the production of biodiesel by varying the reaction parameters using Box-Behnken design response surface methodology (RSM-BBD). …”
    Get full text
    Article
  13. 413

    Efficient Synthesis of 1-Amidoalkyl-2-Naphthols by One-Pot, Three-Component Reaction under Solvent-Free Conditions by Zahed Karimi-Jaberi, Marziyeh Jokar, S. Zoleykha Abbasi

    Published 2013-01-01
    “…High yields, short reaction times, easy workup of the catalyst are advantages of these procedures.…”
    Get full text
    Article
  14. 414

    Poly(4-Vinylpyridinium)Hydrogen Sulfate Catalyzed an Efficient and Ecofriendly Protocol for the One-Pot Multicomponent Synthesis of 1,8-Acridinediones in Aqueous Medium by Janardhan Banothu, Rajitha Bavantula, Peter A. Crooks

    Published 2013-01-01
    “…Highly efficient, ecofriendly, and improved protocol for the synthesis of 1,8-acridinediones has been developed via one-pot multicomponent condensation of 1,3-cyclohexanedione/dimedone, aromatic aldehydes, and ammonium acetate utilizing poly(4-vinylpyridinium)hydrogen sulfate as catalyst in aqueous medium. Excellent yields in shorter reaction time, simple work-up procedure, easy recovery, and reusability of the catalyst are attractive features of this green protocol.…”
    Get full text
    Article
  15. 415

    Monometallic Pd and Pt and Bimetallic Pd-Pt/Al2O3-TiO2 for the HDS of DBT: Effect of the Pd and Pt Incorporation Method by Reynaldo Martínez Guerrero, Agileo Hernández-Gordillo, Víctor Santes, Jorge Roberto Vargas García, José Escobar, Leonardo Díaz-García, Lucía Díaz Barriga Arceo, Vicente Garibay Febles

    Published 2014-01-01
    “…The effect of the preparation method of monometallic Pd and Pt and bimetallic Pd-Pt/Al2O3-TiO2 catalysts on the hydrodesulfurization (HDS) of dibenzothiophene (DBT) was investigated in this study. …”
    Get full text
    Article
  16. 416

    Recent Overview of Solar Photocatalysis and Solar Photo-Fenton Processes for Wastewater Treatment by A. G. Gutierrez-Mata, S. Velazquez-Martínez, Alberto Álvarez-Gallegos, M. Ahmadi, José Alfredo Hernández-Pérez, F. Ghanbari, S. Silva-Martínez

    Published 2017-01-01
    “…Parameters that influence the degradation and mineralization of organics like catalyst preparation, type and load of catalyst, catalyst phase, pH, applied potential, and type of organic pollutant are addressed. …”
    Get full text
    Article
  17. 417

    Solvent-free Synthesis of Nitriles from Aldehydes Catalyzed by KF/Al2O3, Montmorillonite KSF and K10 by Li-Jun Li, Ying-Xia Song, Yan-Su Gao, Yan-Feng Li, Jian-Feng Zhang

    Published 2006-01-01
    “…KF/Al2O3 was more effective catalyst both in multistep procedure and one-pot reaction.…”
    Get full text
    Article
  18. 418

    Investigation of Friedel-Crafts Alkylation in the Presence of Supported Sulfonic Acid on Silica Gel by A. R. Kiasat, M. Karimi-Cheshmeali, R. Soleymani, H. Rajabzadeh

    Published 2012-01-01
    “…The solid acid supported on silica gel and then as an effective catalyst in Friedel-Crafts alkylation of alcohols and aromatic compounds was used. …”
    Get full text
    Article
  19. 419

    Reaction Kinetics of Cinnamaldehyde Hydrogenation over Pt/SiO2: Comparison between Bulk and Intraparticle Diffusion Models by Ali Al-Shathr, Zaidoon M. Shakor, Bashir Y. Al-Zaidi, Hasan Sh. Majdi, Adnan A. AbdulRazak, Safa Aal-Kaeb, Adel A. Shohib, James McGregor

    Published 2022-01-01
    “…The liquid-phase hydrogenation of cinnamaldehyde over a Pt/SiO2 catalyst was investigated experimentally and theoretically. …”
    Get full text
    Article
  20. 420

    All-round enhancement induced by oxophilic single Ru and W atoms for alkaline hydrogen oxidation of tiny Pt nanoparticles by Wensheng Jiao, Zhanghao Ren, Zhibo Cui, Chao Ma, Ziang Shang, Guanzhen Chen, Ruihu Lu, Tao Gan, Ziyun Wang, Yu Xiong, Yunhu Han

    Published 2025-01-01
    “…However, platinum (Pt), as the benchmark catalyst for the hydrogen oxidation reaction (HOR) of AEMFCs anodes, still faces issues of insufficient performance and susceptibility to CO poisoning. …”
    Get full text
    Article