Epäpuhtauskaasu

Epäpuhtauskaasu, often translated as impurity gas or contaminant gas, refers to any gaseous substance present in a mixture that is not the intended or primary component. These gases can arise from various sources during industrial processes, chemical reactions, or even as natural atmospheric constituents. Their presence, even in small concentrations, can significantly impact the quality, safety, and efficiency of a process or product.

The nature of epäpuhtauskaasu can range widely, from inert gases like nitrogen or argon that might be present as byproducts of air separation, to reactive gases such as carbon monoxide, sulfur dioxide, or volatile organic compounds (VOCs). In some contexts, even water vapor can be considered an epäpuhtauskaasu if its presence is detrimental to a specific application, such as in the manufacturing of semiconductors where extreme dryness is required.

Identifying and quantifying epäpuhtauskaasu is crucial for many industries. Analytical techniques like gas chromatography, mass spectrometry, and various sensors are employed to detect and measure these contaminants. Controlling or removing epäpuhtauskaasu is often achieved through purification processes such as adsorption, absorption, condensation, or catalytic conversion, depending on the specific impurity and the desired purity level of the main gas stream. The economic and environmental implications of epäpuhtauskaasu are also significant, as their release into the atmosphere can contribute to pollution, and their removal from industrial streams can be costly.