### What is DETCHEM?

**DETCHEM **is a package of software tools specifically designed for the modeling and
simulation of reacting flows, in particular of heterogeneous systems. The name is
derived from **DET**ailed **CHEM**istry, which constitutes its fundamental
potential: The use of elementary step reaction mechanisms in modeling surface and / or
gas-phase chemistry.

In many applications, the huge number of chemical species and reactions makes the complete
system simulation a prohibitive task for commercial CFD codes which are mostly written for general
purpose applications. **DETCHEM **uses state of the art numerical algorithms for the
solution of huge equations systems arising from the physico-chemical models for the simulation
of special applications, and thus saving the computational time that otherwise could have
been prohibitive with multi-purpose CFD software. Nowadays **DETCHEM** is widely used
in academic as well as in industrial
research, for example in the chemical, automotive, petrochemical and energy industries.

The core of **DETCHEM **is a collection of routines for the calculation of chemical
reaction rates, species transport, and thermodynamic properties called the library modules. The
reactor models are built on top of this library in a modular way covering a wide range of
applications, such as: