دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. the breaking down of low temperatures and pressures.2. a motor gasoline refining process in which heavy hydrocarbon components are broken down into light hydrocarbon components using catalysts and relatively low temperatures and pressures. It produces a gasoline that has a higher octane rating and a lower sulphur content than that produced by thermal cracking.

n: the process of breaking down large chemical compounds into smaller compounds under the influence of heat or catalysts. In petroleum refining, the two major types of cracking are thermal cracking and

n: under certain circumstance ,the same monocase above two are translated into relatively great-quality-molecule polymers by catalysts.

n: any chemical used in the refming process that speeds or alters the process without the catalysts being affected.