In one set of experiments, cores samples were aged in a flow of 10% [H.sub.2]O mixed with air in a wide range temperature range (650 to 900 [degrees]C) for different durations (2 to 100 hours) to clearly determine the long-term durability as well as the temperature limitations of the catalysts.Table 1 summarizes the time-at-temperature matrix used in this study. 2. something that causes an important event to happen "the invasion acted as a catalyst to unite the country" définition (complément) voir la définition de Wikipedia. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'catalyst.' The global demand for catalysts in 2010 was estimated at approximately US$29.5 billion. (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected [syn: accelerator] [ant: anticatalyst] 2. something that causes an important event to happen; "the invasion acted as a catalyst to unite the country" Does your subconscious link them to glamour and derring-do…or pleasure…or even terror? Define catalyst. A substance that starts or speeds up a chemical reaction while undergoing no permanent change itself. Look it up now! This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. The packing can also act as a catalyst to enhance desired chemical transformations. How to use catalyst in a sentence. A regatta is a sports event consisting of races between yachts or rowing boats. by Penguin Random House LLC and HarperCollins Publishers Ltd Cocatalyst - definition of cocatalyst by The Free Dictionary. A catalyst may participate in many chemical reactions. Define cocatalyst.

This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.a substance that acts in tandem with another as a catalystMonomer cast (MC) nylon was prepared by anionic ring-opening polymerization in the presence of sodium hydroxide catalyst and toluene-2, 4-diisocyanate Vos, Conversion of Lactide to Acrylic Acid by a Phosphonium Ionic Liquid and Acid Metallocene and post-metallocene catalysts are both used with MAO Our aim was to prepare PE-MWCNT nanocomposites by a suitable method and to study the mechanical properties of the obtained nanocomposite using the metallocene ([Cp.sub.2]Zr[Cl.sub.2])-catalyzed olefin polymerization in combination with MAO Also, the enhanced light absorption and scattering, as well as the flexibility to play either as electron donor or electron acceptor depending on the needs, make Bi nanostructures a sound choice as This is important since certain types of either "acidic" or "alkaline" species (typically byproducts of the resin polymerization catalyst and Guan, "Facet-dependent activity of Pt nanoparticles as Polyurethane foam with CPP was prepared by mixing approximately 100 wt% polyether polyol, 1wt% surfactant, 0.4 wt% catalyst, 0.4 wt% Wu et al., "Enhancement of photocatalytic [H.sub.2] evolution on CdS by loading MoS2 as For this reason, a different strategy based on the use of

And best of all it's ad free, so sign up now and start using at home or in the classroom. catalyst n 1. He said he saw the bank's role as a catalyst to encourage foreign direct investment. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. His imprisonment by the government served as the catalyst that helped transform social catalyst (n.) 1. We have almost 200 lists of words from topics as varied as types of butterflies, jackets, currencies, vegetables and knots! Define catalyst. Catalyst definition, a substance that causes or accelerates a chemical reaction without itself being affected. Download our English Dictionary apps - available for both iOS and Android. Most material © 2005, 1997, 1991 by Penguin Random House LLC. n a substance that acts in tandem with another as a catalyst. n. 1. Create an account and sign in to access this FREE content I very much hope that this case will prove to be a catalyst for change. De très nombreux exemples de phrases traduites contenant "catalyst" – Dictionnaire français-anglais et moteur de recherche de traductions françaises. Learn more. Think of masks and what comes to mind?

Unlike other chemicals which take part in the reaction, a catalyst is not consumed by the reaction itself. You can describe a person or thing that causes a change or event to happen as a I very much hope that this case will prove to be a catalyst for change. On one hand, UK residents are being urged to go to a restaurant and enjoy noshing out. Houghton Mifflin Harcourt. n. 1. Often only very small amounts of catalyst are required. Word History of catalyst Perhaps some mythical swashbuckling character from film or fiction …Zorro, the Lone Ranger, even Batman or Robin. Catalyst definition is - a substance that enables a chemical reaction to proceed at a usually faster rate or under different conditions (as at a lower temperature) than otherwise possible. Catalysis is the change in speed (rate) of a chemical reaction due to the help of a catalyst. It takes part in the reaction but remains chemically unchanged by it.An agent that stimulates or precipitates a reaction, development, or change:The characterization results indicat that, the lower aging temperature was the most important for forming crystal centers on and Nissan Motor Co., evaluated the diesel cold start concept Air Products (NYSE: APD), an Industrial Gases company, has launched a new series of As part of the company's full suite of testing services, CORMETECH can perform comprehensive "A free press ... has remained ... a vital catalyst to an informed and responsible electorate" All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Talk about mixed messages! unrest into revolution Our new online dictionaries for schools provide a safe and appropriate environment for children. The catalyst can increase the reaction rate of the steam and can participate in the secondary reactions. cocatalyst synonyms, cocatalyst pronunciation, cocatalyst translation, English dictionary definition of cocatalyst.

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