Trace gas Trace gas The most abundant gases in the atmosphere are nitrogen (78.1%), oxygen (20.9%), and argon (0.934%). Combined, oxygen, argon, and nitrogen make up 99.934% of the gases in the atmosphere (not including water vapor). The other gases that are not part of the 99.934% of the atmosphere are called trace gases. The abundance of a trace gas can range from a few parts per trillion (ppt) by volume to several hundred parts per million by volume (ppmv). When a trace gas is added into the atmosphere, that process is called a "source". There are two possible types of sources
Endothermic gas gas in the endothermic atmosphere is combined with an additive gas including natural gas, propane (CH) or air and is then used to improve the surface chemistry work positioned in the furnace. There are two common purposes of the atmospheres in the heat treating industry: Principal Components of Endothermic Gas Generators : Chemistry of Endothermic Gas Generators: Applications of Endothermic Gas Generators: It is relatively simple to operate and maintain endothermic gas generators, however, maintenance such as the burnout process is often overlooked. Troubleshooting the Endothermic Gas Generator (Cracking at 1040°C): Endothermic gas Endothermic gas is a gas that inhibits