What is a heterogeneous catalyst?

The term "phase" concerns the state of matter; There are solid, liquid and gas phases. The heterogeneous catalyst is a participant in a chemical reaction that is not part of the same phase of matter as real reactants. For example, liquids may be subject to a reaction in the presence of a solid catalyst. While the catalyst accelerates the reaction process, reactants alone remain without dispute. Present or other transient metals are often used as a heterogeneous catalyst and can be gently divided for increased exposure to the surface above the substrate or carrier.

It is more of a heterogenic catalyst than a homogeneous variety that is most used industrially. The exposed catalytic surface provides places for weak surface bonds of geometrically aligned reaction components. This behavior is important, such as the hydrogenation of the double carbon bond. It is good to consider an example such as ethylene that has a chemical structure of H _{2 c = ch 2 . When one ethylene molecule is close to a little catalyticThe surface, adsorbed or connected by the lower left atom of the hydrogen and the atom of the lower right hydrogen - the upper and right hydrogen atoms remain free.}

The only hydrogen molecule, h 2 or h - h, can then add through a double binding that is replaced by a single binding and creates a "saturated" ethan or h 3 c - ch _{3 . However, there are two ways of adding hydrogen atoms via double binding. Either both can add a double bond from the mine, or it is possible to add below, while the other adds above the double binding on the other side. The addition of both hydrogen atoms to one side of the double bond is called "cis-ad", while adding one to one side and the other to the other is called "transdice". Undoubtedly, the term "trans-tuk"-serves to describe unsaturated fat, which has been a hydrogenated translation-be known readers.}

catalysts will pick up the speed of reactions for whichThey are used because the reaction path is changed by their presence. This changes the condition of the transition and reduces the activation energy needed to perform the reaction. One of the advantages of such a reaction carried out with a heterogenic catalyst is the ease of the catalyst regenerability. Heterogeneous catalysts are particularly suitable for chemical reactions with a continuous process in which the material is provided, reacted, removed and replaced, continuously. An example of such a heterogeneous process of the catalyst from the oil industry is the use of pelletized catalytic material in the so -called "movable bed" process.