catalytic activity

The rate a catalytic converter purifies the exhaust system

Dictionary of automotive terms. 2015.

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  • catalytic activity — noun a) The increase in rate of a chemical reaction caused by the presence of a catalyst. b) An amount of catalyst, expressed as the increase of the rate of its reaction …   Wiktionary

  • Non-faradaic electrochemical modification of catalytic activity — Non Faradic Electrochemical Modification of Catalytic Activity, or the NEMCA effect, is used to describe the increase in catalytic activity (up to 90 fold) and selectivity of a gas exposed electrode on a solid electrolyte cell upon application of …   Wikipedia

  • activity — See catalytic activity low temperature activity specific activity …   Dictionary of automotive terms

  • Catalytic reforming — is a chemical process used to convert petroleum refinery naphthas, typically having low octane ratings, into high octane liquid products called reformates which are components of high octane gasoline (also known as petrol). Basically, the process …   Wikipedia

  • Activity — may mean: *action, in general *physical activity * Activity , an alternative name for the game charades * Activity , a task. * Activity , the ability of a piece to influence the game in chess * Activity , the rate of a catalytic reaction, such as …   Wikipedia

  • Fluid catalytic cracking — (FCC) is the most important conversion process used in petroleum refineries. It is widely used to convert the high boiling hydrocarbon fractions of petroleum crude oils to more valuable gasoline, olefinic gases and other products.cite book|author …   Wikipedia

  • Peptidyl-glutamyl peptide-hydrolyzing activity — Peptidyl glutamyl peptide hydrolyzing (PGPH) enzyme activity is a means of proteolysis that cleaves peptide bonds in proteins immediately after acidic or branched chain amino acids. One of the three catalytic β subunits of the proteasome has PGPH …   Wikipedia

  • enzyme activity — the catalytic effect exerted by an enzyme, expressed as units per milligram of enzyme (specific activity) or as molecules of substrate transformed per minute per molecule of enzyme (molecular activity). The conventional unit of enzyme activity is …   Medical dictionary

  • specific activity — 1. activity per unit weight of a radioactive material, or the activity of a radioisotope per unit weight of the element (including stable isotopes) present. 2. the catalytic effect of an enzyme expressed as units per milligram of enzyme …   Medical dictionary

  • specific activity — The conversion rate of a given catalytic converter per unit volume; it is desirable to have a high specific activity, i.e., a small but efficient converter …   Dictionary of automotive terms

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