catalyst bed

catalyst bed
A layer of catalyst-coated material such as pellets or ceramic in a catalytic converter through which the gases pass.

Dictionary of automotive terms. 2015.

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  • bed — Any flat surface used as a support. Also see catalyst bed low bed test bed …   Dictionary of automotive terms

  • bed — bedless, adj. bedlike, adj. /bed/, n., v., bedded, bedding. n. 1. a piece of furniture upon which or within which a person sleeps, rests, or stays when not well. 2. the mattress and bedclothes together with the bedstead of a bed. 3. the bedstead… …   Universalium

  • Catalyst for pressure swing adsorption — Pressure Swing Adsorption (PSA) processes rely on the fact that under pressure gases tend to be attracted to solid surfaces, or adsorbed. The higher the pressure, the more gas is adsorbed; when the pressure is reduced, the gas is released, or… …   Wikipedia

  • single-bed oxidizing converter — A converter with one catalyst bed for HC and CO control …   Dictionary of automotive terms

  • Packed bed — In chemical processing, a packed bed is a hollow tube, pipe, or other vessel that is filled with a packing material. The packing can be randomly filled with small objects like Raschig rings or else it can be a specifically designed structured… …   Wikipedia

  • moving-bed catalyst — Moving bed catalytic processes add fresh or regenerated catalyst to the top of a reactor bed while simultaneously removing less active, used catalyst from the bottom. An important current example is UOP’s CCR reforming process. Catalysts for… …   Petroleum refining glossary

  • Fluidized bed reactor — A fluidized bed reactor (FBR) is a type of reactor device that can be used to carry out a variety of multiphase chemical reactions. In this type of reactor, a fluid (gas or liquid) is passed through a granular solid material (usually a catalyst… …   Wikipedia

  • fluid-bed catalyst — Any catalyst used in a fluidized bed. When gas is allowed to flow upward through container filled with fine powder at a sufficient velocity, the gas solid mix exhibits the properties of a boiling liquid. Catalysis under these conditions can be… …   Petroleum refining glossary

  • fixed-bed catalyst — Any catalyst used in a reactor where the catalyst fills the reactor and remains motionless (fixed) and the gas and/or liquid feed mixtures flows past. The fluid flows through the void spaces between catalyst particles …   Petroleum refining glossary

  • cyclic fixed-bed system — A process were the feed and conditions in a catalytic reactor are changed regularly in an alternating fashion. The most common example is where the reaction deposits coke; feed is passed through the bed continuously until the activity falls to a… …   Petroleum refining glossary

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