Auswahl der wissenschaftlichen Literatur zum Thema „Magnetic heterogeneous catalyst“
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Zeitschriftenartikel zum Thema "Magnetic heterogeneous catalyst"
Hülsey, Max J., Chia Wei Lim und Ning Yan. „Promoting heterogeneous catalysis beyond catalyst design“. Chemical Science 11, Nr. 6 (2020): 1456–68. http://dx.doi.org/10.1039/c9sc05947d.
Der volle Inhalt der QuelleKang, Na, Yindi Fan, Dan Li, Xiaoli Jia und Sanhu Zhao. „Preparation of Magnetic Nano-Catalyst Containing Schiff Base Unit and Its Application in the Chemical Fixation of CO2 into Cyclic Carbonates“. Magnetochemistry 10, Nr. 5 (26.04.2024): 33. http://dx.doi.org/10.3390/magnetochemistry10050033.
Der volle Inhalt der QuelleWang, Baohua, Bingquan Wang, Sudheesh K. Shukla und Rui Wang. „Enabling Catalysts for Biodiesel Production via Transesterification“. Catalysts 13, Nr. 4 (13.04.2023): 740. http://dx.doi.org/10.3390/catal13040740.
Der volle Inhalt der QuelleGutiérrez-Ortega, Norma, Esthela Ramos-Ramírez, Alma Serafín-Muñoz, Adrián Zamorategui-Molina und Jesús Monjaraz-Vallejo. „Use of Co/Fe-Mixed Oxides as Heterogeneous Catalysts in Obtaining Biodiesel“. Catalysts 9, Nr. 5 (29.04.2019): 403. http://dx.doi.org/10.3390/catal9050403.
Der volle Inhalt der QuelleKovtunov, Kirill V., Oleg G. Salnikov, Ivan V. Skovpin, Nikita V. Chukanov, Dudari B. Burueva und Igor V. Koptyug. „Catalytic hydrogenation with parahydrogen: a bridge from homogeneous to heterogeneous catalysis“. Pure and Applied Chemistry 92, Nr. 7 (28.07.2020): 1029–46. http://dx.doi.org/10.1515/pac-2020-0203.
Der volle Inhalt der QuellePanda, Niranjan, Ashis Kumar Jena und Sasmita Mohapatra. „Heterogeneous magnetic catalyst for S-arylation reactions“. Applied Catalysis A: General 433-434 (August 2012): 258–64. http://dx.doi.org/10.1016/j.apcata.2012.05.026.
Der volle Inhalt der QuelleTaufik, Ardiansyah, Shofianina Djalaluidin und Rosari Saleh. „Photocatalytic and Sonophotocatalytic Activity of Magnetic Heterogeneous Fe3O4/TiO2/CuO Catalyst“. Materials Science Forum 864 (August 2016): 128–33. http://dx.doi.org/10.4028/www.scientific.net/msf.864.128.
Der volle Inhalt der QuelleNgoie, Wighens I., Pamela J. Welz, Daniel Ikhu-Omoregbe und Oluwaseun O. Oyekola. „Heterogeneous Nanomagnetic Catalyst from Cupriferous Mineral Processing Gangue for the Production of Biodiesel“. Catalysts 9, Nr. 12 (10.12.2019): 1047. http://dx.doi.org/10.3390/catal9121047.
Der volle Inhalt der Quellede Abreu, Wiury C., Marco A. S. Garcia, Sabrina Nicolodi, Carla V. R. de Moura und Edmilson M. de Moura. „Magnesium surface enrichment of CoFe2O4 magnetic nanoparticles immobilized with gold: reusable catalysts for green oxidation of benzyl alcohol“. RSC Advances 8, Nr. 7 (2018): 3903–9. http://dx.doi.org/10.1039/c7ra13590d.
Der volle Inhalt der QuelleAfshari, Mozhgan, Sónia A. C. Carabineiro und Maryam Gorjizadeh. „Sulfonated Silica Coated CoFe2O4 Magnetic Nanoparticles for the Synthesis of 3,4-Dihydropyrimidin-2(1H)-One and Octahydroquinazoline Derivatives“. Catalysts 13, Nr. 6 (09.06.2023): 989. http://dx.doi.org/10.3390/catal13060989.
Der volle Inhalt der QuelleDissertationen zum Thema "Magnetic heterogeneous catalyst"
Luo, Mingliang. „Heterogeneous catalytic oxidation of aqueous phenol using an iron-based catalyst and a magnetic titanium dioxide photocatalyst“. Thesis, University of East Anglia, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445198.
Der volle Inhalt der QuelleAlmasi, Sara. „Nouveau catalyseur et système d'agitation vibrant pour l'amélioration de la production de biodiesel et de biolubricant“. Electronic Thesis or Diss., Université de Toulouse (2023-....), 2024. http://www.theses.fr/2024TLSEP039.
Der volle Inhalt der QuelleThe environmental impact caused by the use of non-renewable fuel and lubricant resources, coupled with concerns about climate change, has increased the demand for sustainable energy sources. Biobased products, such as biodiesel and bio-lubricants, have emerged as alternatives to mineral fuels and lubricants due to their availability, renewability, lower gas emissions, non-toxicity and biodegradability. Although biodiesel and bio-lubricants are typically produced through the transesterification reaction with homogeneous catalysts in conventional stirred-tank reactors, there are two primary challenges associated with each of these processes. Firstly, the use of homogeneous catalysts requires numerous and costly purification steps. Heterogeneous basic catalysts that have high surface area and that are reusable and easy to separate are a promising solution to mitigate these challenges. Secondly, the transesterification reaction is a slow mass-transfer limited reaction that involves two immiscible liquids, specifically triglyceride and methanol. For biodiesel production in stirred-tank reactors there are many associated challenges such as inadequate mixing, limited interfacial area between liquids and long process times. This results in low biodiesel content and the formation of undesirable secondary products. Alternate mixing equipment that improves liquid-liquid contacting to intensify and enhance the transesterification may be required.The objective of this study is to explore two different ways to enhance biodiesel and biolubricant production: by developing a new heterogeneous catalyst and by using a vibromixer to enhance mixing. Firstly, a heterogeneous basic catalyst named magnetic activated carbon, derived from almond shell waste and modified by calcium oxide (MAC@CaO), was synthesized. The resulting material underwent comprehensive characterization using various techniques. Subsequently, the potential of the MAC@CaO as a recoverable basic catalyst in transesterification reactions was explored, focusing on the production of fatty acid methyl ester (FAME) and trimethylolpropane triester (TMPTE). Optimal reaction conditions yielded FAME and TMPTE yields of 93.2% and 95.3%, respectively. The recyclability of the MAC@CaO catalyst was also assessed to determine its chemical stability. FAME and TMPTE yields remained consistently above 85% over five consecutive cycles, highlighting the potential of the developed catalyst. In the second part of this thesis, the vibromixer underwent comprehensive testing to evaluate its mixing capabilities for both single-phase and multiphase (solid-liquid and liquid-liquid-solid) mixing operations. The objective of this assessment was to gain a better understanding of the vibromixer device for various mixing processes by quantify mixing time, cloud height, and Pickering emulsion production before applying it to biodiesel production. The results show that single phase mixing and solids suspension improve when increasing the vibration amplitude and mixer plate size. Pickering emulsions characterized with small droplet sizes (approximately 2 microns) have a stability exceeding two months. Subsequently, the results from the biodiesel production experiments using the vibromixer demonstrated a similar trend. With an increase in vibration amplitude, plate size and the number of conical holes in the plate, the FAME content also increased. The maximum FAME content achieved was 97.8% after only 30 minutes; this is equivalent or shorter than for stirred tank reactors. It is expected that the enhanced reaction is due to good flow circulation and excellent breakup of droplets, which consequently increases interfacial area and significantly improves the mass transfer processes involved in the transesterification reaction of triglycerides into FAMEs
Ciccotti, Larissa. „Preparação de catalisadores magnéticos para aplicação em fotocatálise heterogênea e ozonização catalítica heterogênea de poluentes emergentes“. Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-02102014-080554/.
Der volle Inhalt der QuelleThe present work describes the preparation of magnetic catalysts for application in heterogeneous photocatalysis and heterogeneous catalytic ozonation processes, aiming the degradation of emerging pollutants. Magnetic nanoparticles were prepered as substratum of magnetic TiO2 catalysts. Several experimental variables were evaluated in the preparation of the magnetic nanoparticles, such as temperature, stirring time, sonication time, precipitation reaction stirring speed, base addition rate, dispersion stirring time, base concentration and stabilizer percentage. The influence of these parameters on particle hydrodynamic diameter and size distribution were measured by a statistical design. Depending on the experimental conditions, materials with an average size ranging between 11 nm and 35 nm and distribution between 23% and 77% were obtained. In the optimum preparation conditions, Fe3O4 magnetic particles with a hydrodynamic diameter of 18 nm and 21% distribution were obtained. The magnetic nanomaterial was used to prepare the hybrid catalysts Fe3O4@TiO2 and Fe3O4@SiO2@TiO2. The prepared materials were characterized by X-ray diffraction (XRD), field-emiss ion scanning electron microscopy (FEG-SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric (TG), differential thermal analysis (DTA), inductively coupled plasma optical emission spectrometry (ICP-OES), BET specific surface area and dynamic light scattering (DLS). The magnetic catalysts were employed in the degradation of the emerging pollutants paracetamol; 4-methylaminoantipyrin (4-MAA); ibuprofen; 17 β-estradiol; 17 α-ethinyl estradiol, and phenol. In the treatment processes the effect pH on the systems was also varied. In general, the material Fe3O4@TiO2 showed catalytic activity in the processes of photochemical degradation and ozonation, with performance similar or, in some cases, superior to TiO2. For example, the 4-MAA mineralization, after 60 minutes of treatment, by the photolysis process reached a m aximum value of 25%. In the same treatment time by the photocatalytic process using Fe3O4@TiO2 it was obtained 66% of 4-MAA mineralization. For the ozonation process, in pH 3, after 180 minutes of treatment, 40% of 4-MAA mineralization was achieved by non-catalytic method. On the other hand, in the same treatment time employing Fe3O4@TiO2, 60% of 4-MAA mineralization was obtained. In addition, for the ozonation process using TiO2 similar results to non-catalytic ozonation were observed, which demonstrates the positive effect of the magnetic core for the activity of the catalyst. Thus, the hybrid material Fe3O4@TiO2 was efficient for the degradation of emerging pollutants employing the photocatalysis and heterogeneous catalytic ozonation processes, allowing an additional practicality for separating the catalyst from the treatment medium.
Chan, Chun Wong Aaron. „Ultraselective nanocatalysts in fine chemical and pharmaceutical synthesis“. Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:866296af-5296-4d2e-8e52-6499dacaef0f.
Der volle Inhalt der QuelleCook, Robert M. „The development of magnetic granulometry for application to heterogeneous catalysts“. Thesis, University of Warwick, 2014. http://wrap.warwick.ac.uk/63943/.
Der volle Inhalt der QuelleDiebold, Carine. „Developpement de nouveaux catalyseurs au palladium supporté sur polymères ou nanoparticules de cobalt : application à la formation de liaisons carbone-carbone“. Phd thesis, Université de Haute Alsace - Mulhouse, 2012. http://tel.archives-ouvertes.fr/tel-00807363.
Der volle Inhalt der QuelleRoberts, Stephanie Tegan. „NMR relaxometry and diffusometry techniques for exploring heterogeneous catalysis“. Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607731.
Der volle Inhalt der QuelleClayton, C. „Magnetic resonance as a probe of solvent effects in heterogeneous catalysis“. Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597760.
Der volle Inhalt der QuellePérez, Galera Juana María. „Impregnated Cobalt, Nickel, Copper and Palladium Oxides on Magnetite: Nanocatalysts for Organic Synthesis“. Doctoral thesis, Universidad de Alicante, 2016. http://hdl.handle.net/10045/57586.
Der volle Inhalt der QuelleSmith, Christopher Stanley. „The application of in-situ high pressure nuclear magnetic resonance spectroscopy to heterogeneous catalysis“. Thesis, University of Liverpool, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317244.
Der volle Inhalt der QuelleBücher zum Thema "Magnetic heterogeneous catalyst"
B, Lapina O., Mudrakovskiĭ I. L und Talzi E. P, Hrsg. I͡a︡dernyĭ magnitnyĭ rezonans v geterogennom katalize. Novosibirsk: "Nauka", 1992.
Den vollen Inhalt der Quelle findenSørland, Geir Humborstad Humborstad. Dynamic Pulsed-Field-Gradient NMR. Springer, 2016.
Den vollen Inhalt der Quelle findenBuchteile zum Thema "Magnetic heterogeneous catalyst"
Taarit, Y. Ben, und J. Fraissard. „Nuclear Magnetic Resonance in Heterogeneous Catalysis“. In Catalyst Characterization, 91–129. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4757-9589-9_5.
Der volle Inhalt der QuellePerera, Ayomi S. „CHAPTER 4. Sustainable Magnetic Nanocatalysts in Heterogeneous Catalysis“. In Magnetic Nanomaterials, 99–119. Cambridge: Royal Society of Chemistry, 2017. http://dx.doi.org/10.1039/9781788010375-00099.
Der volle Inhalt der QuelleGladden, Lynn F., Michal Lutecki und James McGregor. „Nuclear Magnetic Resonance Spectroscopy“. In Characterization of Solid Materials and Heterogeneous Catalysts, 289–342. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527645329.ch8.
Der volle Inhalt der QuellePfeifer, Harry. „Nuclear Magnetic Resonance Spectroscopy in Studies of Catalysts“. In Fundamental Aspects of Heterogeneous Catalysis Studied by Particle Beams, 151–66. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-5964-7_14.
Der volle Inhalt der QuelleDuncan, T. M. „The Study of Dynamics at Catalytic Surfaces with Nuclear Magnetic Resonance Spectroscopy“. In Elementary Reaction Steps in Heterogeneous Catalysis, 221–41. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1693-0_13.
Der volle Inhalt der QuelleAravena, S., C. Pizarro, M. A. Rubio, L. C. D. Cavalcante, V. K. Garg, M. C. Pereira und J. D. Fabris. „Magnetic minerals from volcanic Ultisols as heterogeneous Fenton catalysts“. In LACAME 2008, 35–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-10764-1_7.
Der volle Inhalt der QuelleRahim Pouran, Shima, Mohammad Saleh Shafeeyan, Abdul Aziz Abdul Raman, Wan Mohd Ashri Wan Daud und Abolfazl Bayrami. „Transition Metal-Substituted Magnetite as an Innovative Adsorbent and Heterogeneous Catalyst for Wastewater Treatment“. In Adsorption Processes for Water Treatment and Purification, 225–47. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58136-1_8.
Der volle Inhalt der QuelleBauer, M., U. Bentrup, J. B. Priebe und A. Brückner. „Operando Techniques“. In Contemporary Catalysis: Science, Technology, and Applications, 549–88. The Royal Society of Chemistry, 2017. http://dx.doi.org/10.1039/9781849739900-00549.
Der volle Inhalt der QuelleWeller, Mark, Jonathan Rourke, Tina Overton und Fraser Armstrong. „Materials chemistry and nanomaterials“. In Inorganic Chemistry. Oxford University Press, 2018. http://dx.doi.org/10.1093/hesc/9780198768128.003.0027.
Der volle Inhalt der QuelleVenkataswamy, Perala, Deshetti Jampaiah und Benjaram M. Reddy. „Microwave-assisted Synthesis of Nanostructured Oxide Catalysts“. In Advances in Microwave-assisted Heterogeneous Catalysis, 52–73. Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781837670277-00052.
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