Definition Ring-opening polymerization (ROP) is a polymerization process in which cyclic monomers undergo ring opening in the presence of an initiator or catalyst to form linear polymer chains. Unlike conventional addition polymerization, ring-opening polymerization converts the ring structure of the…
Definition Polymerization is a chemical reaction in which one or more monomers combine to form high-molecular-weight polymers without producing low-molecular-weight by-products. Depending on the monomers involved, polymerization may produce either homopolymers (from a single monomer) or copolymers (from two or…
Definition A non-Newtonian fluid is any fluid whose viscosity varies with applied shear stress or shear rate, rather than remaining constant as described by Newton’s law of viscosity. Unlike Newtonian fluids such as water or air, non-Newtonian fluids exhibit changes…
Definition Definition A plate heat exchanger (PHE) is a type of heat transfer equipment that uses a series of thin metal plates to transfer heat between two fluids. The plates are arranged to form alternating flow channels, allowing hot and…
Eliminating Thermal Runaway and Scale-Up Challenges How Tubular Reactors Are Reshaping Continuous Chemical Manufacturing In the fine chemical and specialty chemical industries, process engineers face two persistent challenges: thermal runaway and scale-up failure. The former threatens plant safety, while the…
Definition A heat exchanger is a device used to transfer thermal energy between two fluids in order to achieve heating, cooling, condensation, or vaporization. In most heat exchangers, the fluids are separated by a solid wall or heat-transfer surface, allowing…
Definition A tubular reactor, also known as a tube reactor, is a continuous-flow reactor characterized by its tubular shape and high length-to-diameter ratio. Depending on process requirements, a tubular reactor may consist of a single tube or multiple tubes arranged…
Definition A condenser is a type of heat exchanger primarily used to convert vapor into liquid through cooling. In chemical processing, refrigeration systems, and power generation, condensers remove heat from a vapor stream and promote phase change from the gaseous…
Definition A reboiler is a heating device used to vaporize liquid at the bottom of a distillation column. Also known as a bottom heater, it provides the thermal energy required to generate vapor, which rises through the column and supports…
Definition A gas distributor is a device used in gas-liquid or gas-solid separation and reaction equipment to distribute gas evenly across a process vessel. Its primary function is to ensure that gas enters the equipment at a uniform velocity and…