Sentences with phrase «metal catalyst»

Another production method is called chemical vapor deposition, or CVD, and that's where scientists take a gas of hydrocarbons along with a metal catalyst and are able to remove the hydrogen atoms from the hydrocarbon, then keep only the carbon atoms and then hopefully these carbon atoms kind of arrange themselves side by side into this graphene lattice form.

At the heart of the program is a performance kit that takes the 5.5 - liter twin - turbo V8 to 700 horsepower and 708 lb - ft of electronically - limited torque, achieved by using Brabus Gold Heat Reflection insulation, two custom turbos with a larger compressor unit, a remapped ECU, a free - flow metal catalyst system with 75 mm wide downpipes, and a stainless - steel sport exhaust.

Cleaner emissions are realized through adopting an ultra-low precious metal catalyst and ECM with high - capacity microprocessor — achieving SU - LEV certification levels (emitting 75 % fewer emissions than Japan's 2005 exhaust emission standards).

Trans fats are made by exposing polyunsaturated vegetable oils to a chemical process that involves high heat, hydrogen gas and a metal catalyst.

These hydrogenated oils are highly processed using harsh chemical solvents like hexane (a component of gasoline), high heat, pressure, have a metal catalyst added, and are then deodorized and bleached.

For example, when vegetable oil is heated in the presence of a heavy - metal catalyst and hydrogen, hydrogen atoms combine with the carbon chain to turn the oil solid.

I have not seen any evidence that transfats are created from heating alone without the presence of a metal catalyst.

The manufacturing process is very disgusting... involving high pressure, high heat, a metal catalyst and hydrogen gas.

Methods: The team began by synthesizing a popular metal catalyst, palladium on aluminum oxide.

They were especially interested in the protein's small metal catalyst, an oxygen - evolving complex in which oxygen atoms bridge four manganese atoms with one calcium atom.

These studies revealed that the new template's ability to mediate the attachment of a new functional group to a distant carbon atom can be «tuned» by making slight changes to its chemical composition, including the choice of the proper metal catalyst at its working end.

Wang's research group designed a five - metal catalyst based on these high - entropy - alloy nanoparticles and demonstrated superior catalytic performance for selective oxidation of ammonia to nitrogen oxide, a reaction used by the chemical industry to produce nitric acid, an important chemical in the large - scale production of fertilizers and other products.

A metal catalyst works by causing reactants to bind to its surface, a process known as adsorption.

They added a ruthenium metal catalyst and exposed the mix to bright white light, causing the resilin proteins to bond together in the correct conformation.

Chemist Yves Chauvin of the French Oil Institute in Rueil - Malmaison will receive one - third of the $ 1.3 million prize for working out the details of the «metathesis» reaction, whereby a metal catalyst causes carbon - containing molecules to break bonds and change partners.

The new process, published in Nature Catalysis, utilizes a plasma — an ionized gas — in combination with non-noble metal catalysts to generate ammonia at much milder conditions than is possible with Haber - Bosch.

The research team led by Schneider; David Go, Rooney Family Associate Professor of Engineering in aerospace and mechanical engineering; and Jason Hicks, associate professor of chemical and biomolecular engineering, discovered that because the nitrogen molecules are activated by the plasma, the requirements on the metal catalysts are less stringent, allowing less expensive materials to be used throughout the process.

Baran and his colleagues have previously studied decarboxylative cross-coupling reactions, where commonly - found carboxylic acids are transformed into many different molecules using inexpensive metal catalysts and techniques commonly used for amide - bond synthesis.

Making polymer gels usually requires metal catalysts, which could be hazardous if any of the catalyst remains in the material after the gel is formed.

«We show that our multivalent oxygen sponges can undergo such a redox process at as low as 200 degrees Celsius, which is comparable to the working temperature of noble metal catalysts,» Lee said.

Their new catalyst possesses the structure of nanofiber - based perovskite materials and exhibits excellent electrochemical performance, close to that of today's precious metal catalysts, yet it is still inexpensive.

The development of base metal catalysts for the synthesis of pharmaceutically relevant compounds remains an important goal of chemical research.

The reaction, which often requires precious metal catalysts, couples ammonia or other amines with carbonyl compounds and then with hydrogen.

There's also interest in using metal catalysts to convert carbon dioxide into fuels, make fertilizers from atmospheric nitrogen and drive reactions in fuel - cell cars.

CNTs are often synthesised via chemical vapour deposition, in which hydrocarbon vapour is deposited on metal catalysts under a flow of non-reactive gas at high temperatures.

Brown University researchers have developed a new theory to explain why stretching or compressing metal catalysts can make them perform better.

Heterogeneous catalysis involves the use of metal catalysts like platinum to speed reactions, as in the catalytic converter of a car.

Research in recent years has shown that applying a strain to metal catalysts — either compression or tension — can in some cases change the way they perform.

A catalytic converter on a car, for example, uses metal catalysts to pluck toxins out of exhaust fumes.

Amino alcohols can take part, even though the amino group would deactivate typical metal catalysts by chelation.

«The challenge for the future will be to fabricate metal catalysts embodying atomic patterns that speed chemical reactions along pathways that lead to desired products,» said Polanyi.

In a find that could transform some of the world's most energy - intensive manufacturing processes, researchers at Rice University's Laboratory for Nanophotonics have unveiled a new method for uniting light - capturing photonic nanomaterials and high - efficiency metal catalysts.

Each year, chemical producers spend billions of dollars on metal catalysts, materials that spur or speed up chemical reactions.

«Up until now, rechargeable zinc - air batteries have been made with expensive precious metal catalysts, such as platinum and iridium oxide.

PROVIDENCE, R.I. [Brown University]-- Brown University researchers have developed a new theory to explain why stretching or compressing metal catalysts can make them perform better.

Pharmaceutical companies are increasingly concerned about the use of precious metal catalysts because they are, after all, precious — expensive and in limited supply.

The new catalyst was able to conduct electricity better than the commonly used precious metal catalysts.

Now, Brown University researchers have developed a new model to explain why stretching or compressing metal catalysts can make them perform better.

«Carbon metabolism drives «living» metal catalysts that frequently move around, split, or merge, resulting in a nanoparticle size distribution that's far from the ordinary, and highly tunable,» says Ju Li, professor at the Massachusetts Institute of Technology and a corresponding author of the paper.

The bioinspired architecture allows precious metal catalysts (white) to be strategically placed on the porous scaffold (gray) so that the catalytic reaction is much more efficient and cost - effective.

In addition, high - temperature operation insures highly active kinetics, such that precious metal catalysts are not needed.

Zelenay led the use of nonprecious transition metal catalysts in a composite form, taking advantage of the latest developments in nanostructured materials engineering.

Morris Bullock edited a book on replacing precious metal catalysts with iron, nickel and other earth - abundant metals

No metal catalysts are used in the manufacturing process, and every batch of our XCT is tested for heavy metals.

Six - cylinder aluminium power unit with cylinders in horizontallyopposed arrangement, water - cooled, engine block and cylinder heads made of aluminium, forged titanium connecting rods, four overhead camshafts, four valves per cylinder, variable valve timing (VarioCam with infinite adjustment) on intake and exhaust side, hydraulic valve play compensation, four - stage variable intake mani - fold, dry sump lubrication, twin - chamber exhaust system, two metal catalysts, two oxygen sensors with dual control, 12 litres /

It is fitted with sport air filters and high - performance metal catalysts as well as newly programmed engine electronics with custom mapping for ignition and injection..

In order to cut emissions quickly and effectively a collection of rare metal catalysts were embedded in a ceramic honeycomb structure to burn off the unburnt hydrocarbons and complete the conversion of CO to CO2 along with the NOx Clutch: A mechanism to disengage and apply power from the engine to the gearbox and drive line.

For even higher power from the engine, a low - temperature water radiator for the intercooling system, a free - flow exhaust system with metal catalysts and 75 - mm thick downpipes, as well as special Brabus mapping are present.

There are two close - coupled catalytic converters - one for each bank - mounted directly to the cast iron exhaust manifolds so heat is transferred quickly to the precious metal catalysts for early light - off, which is important since most emissions occur within the first 20 seconds of operation and the catalysts must be at the proper temperature to be effective.

The twin - turbo system further includes a large intercooler, a dual - flow intake manifold with cast - in BRABUS Biturbo logo, and high - performance free - flow metal catalysts for efficient exhaust - gas purification.