Raws li pom los ntawm qhov adhesion ntawm cov khoom nto thiab cov kua dej, cov molecules ntawm cov khoom nto muaj lub zog nto. Thaum nws los rau hauv kev sib cuag nrog cov roj, nws tuaj yeem nyiam qee cov roj molecules rau cov khoom nto kom txo tau nws lub zog saum npoo. Qhov tshwm sim no hu ua adsorption.
Lub adsorption tshwm sim tuaj yeem muab faib ua lub cev adsorption thiab tshuaj lom neeg adsorption. Lub cev adsorption yog tshwm sim los ntawm lub gravitational quab yuam ntawm cov khoom nto molecules thiab cov roj adsorbed molecules. Tshuaj adsorption yog tshwm sim los ntawm chemical bond zog ntawm cov khoom deg molecules. Rau qee yam khoom, nws feem ntau tsuas yog muaj cov tshuaj adsorption ntawm qee cov roj molecules (nyob ntawm seb cov qauv molecular), yog li qhia qhov kev xaiv ntawm adsorption.
Lub cev adsorption thiab tshuaj adsorption feem ntau ua tib lub sijhawm. Qhov ceev ntawm lub cev adsorption yog ceev heev, yog li nws yooj yim mus cuag equilibrium, thaum lub ceev ntawm tshuaj adsorption yog qeeb. Thaum qhov kub thiab txias, lub thermal txav ntawm cov roj molecules intensifies, uas yuav txo tau lub cev adsorption muaj peev xwm thiab ceev ceev cov tshuaj adsorption. Yog li ntawd, nyob rau hauv chav tsev kub, nws yog tsuas yog lub cev adsorption, thaum nyob rau hauv high kub, cov tshuaj adsorption nyhuv yog tseem ceeb.
Lub adsorption tshwm sim yog dav siv nyob rau hauv kev lag luam thiab lub neej txhua hnub, xws li cov khoom catalysts rau tshuaj lom neeg cov tshuaj tiv thaiv, uas feem ntau cia siab rau adsorption activation rau catalyze, thiab adsorbents nyob rau hauv lub qhov ncauj qhov ntswg roj xaiv adsorb teeb meem gases.
