gasbereich

Gasbereich is a German term used in science and engineering to denote the region or domain in which the gaseous phase is present. It is applied in contexts such as thermodynamics, phase diagrams, chemical engineering, and instrumentation to distinguish gas from adjacent phases like liquids and solids.

In thermodynamics and phase diagrams, the gas region of a system is characterized by properties typical of a gas, such as low density and high compressibility. The boundaries between gas and other phases are defined by phase equilibria, for example the dew point and bubble point curves in multi-component systems. The gas region may exist alongside liquid or solid phases, depending on temperature and pressure, and its extent is crucial for reactor design, separation processes, and energy balances.

In engineering applications, the gasbereich encompasses gas-phase reactions, gas-phase transport, and the design of equipment where the gas is the dominant phase, such as roll-through reactors, gas separations, or combustion chambers. It is relevant for processes like distillation, absorption, and catalytic cracking, where gas-phase species interact with condensed phases or with solid catalysts. Gas handling, measurement, and safety considerations also pertain to the gasbereich, including pressure control, purification, and leak prevention.

In measurement and instrumentation, the term can denote a selectable gas range or detection domain, referring to the concentration or partial-pressure interval over which a sensor or analytical device operates effectively. The concept is often discussed alongside other phase domains to describe multiphase systems.