What is the speed of space?

In chemical engineering and reactor engineering, the speed of space on the quotient entering the volume flow of reactants is divided by the reactor volume. It is commonly considered to be the reactor's time. In the industry, the speed of the universe may further define the phase of the reaction components under the given conditions. Special values ​​for this measurement exist for liquids and gases and for systems that use solid catalysts. In this expression, the volume flow of reactor reactor reactor and is the volume of the reactor itself. This expression is a reciprocal definition for the reactor time, τ. However, space time is measured on the reactor entry conditions and the speed of space is often measured under standard conditions, so the ED space is different from the reciprocal area of ​​the measured space. This temperature usually ranges from 60 ° Fahrenheit to 75 ° Fahrenheit (15.6 ° Celsius to 23.9 ° Celsius). The volume flow is considered to be liquids under these conditionsu, i když skutečným materiálem může být plyn za normálních provozních podmínek.

Plyn hodinová rychlost prostoru (GHSV) je podobnou metodou pro vztahy průtoku reaktoru na objem reaktoru. GHSV se obvykle měří při standardní teplotě a tlaku. Different industries may have their own definitions for standard temperature and pressure, and these conditions may be closer to the surrounding conditions than to the International Association of Pure and Applied Chemical Values ​​of 32 ° F (0 ° C) and 1 bar (100 kPa). Pro inženýra je vždy důležité zkontrolovat základ výpočtu.

Hmotnost hodinová rychlost prostoru (WHSV) se liší od LHSV a GHSV, protože objem se nevyužívá. Hmotnost, spíše než objem, poskytuje základ pro WHSV. Toto měření je kvocient hmotnostního průtoku reaktantů děleno hmotou katalyzátoru v reaktoru.

Výpočty jsou jednoduché, když je známý objem reaktoru a je znám příchozí průtok reaktantů. For example, afterKUD 70 feet ^{3 /hour of reactants input to reactor with an internal volume of 250 feet 3 , calculated spatial speed is approximately 0.28 hours -1 . This can be considered as the number of reactor changes that the system passes in one hour.}