Absorption spectra When photons of light pass through a gas, the photons with the same energy as the energy gaps in the atoms can be absorbed. This causes an absorption spectra, as shown below.

Muhammad Imran, Usman Ali, Ali Hasnain, Impact of blends of aqueous amines on absorber intercooling for post combustion CO2 capture system, Energy & Environment, Vol. 32, No. 5 (August 2021), pp.

As soon as the Airscrubber changed its color over its complete length, or if the CO2 content exceeds the standard values of DIN 12021:2014, the absorber material must be replaced - at the latest after ...

The authors suggest one of the main drivers of the tundra's shift from CO2 absorber to emitter could be thawing permafrost, which covers almost half of Canada's land mass.

Abstract: Co:GSGG has excellent spectroscopic properties as a saturable absorber for resonantly laser-pumped 1.6 µm ErYAG at 1620nm (RT). Absorption, emission cross sections, lifetimes, modeling ...