Carbonaceous adsorbents for NH3 removal at room temperature

Enhanced Adsorption of Ammonia on Metal‐Organic Framework/Graphite Oxide Composites: Analysis of Surface Interactions

“…To give some prospective on the obtained capacity values, ammonia adsorption on common unmodified activated carbons and other carbonaceous materials usually falls in the range of 1-20 mg g À1 . [8,9,13,14,35] The adsorption capacity of the composites increases with increasing GO content and is always higher than that of MOF-5 alone. It increases more than ten times with an increase in GO content from 5 to 55%.…”

“…The materials already tested include zeolites, activated carbons, alumina, or graphite oxide (GO). [1,[7][8][9][10] Adsorbents for ammonia must fulfill two main conditions: a porous structure capable of adsorbing large quantities of NH 3 via physisorption, and a welldeveloped chemistry (via the presence of functional groups) in order to ensure reactive adsorption. More precisely, the adsorbents should be microporous because under ambient conditions, ammonia can be strongly retained only in pores similar to its size (3 Å [11] ).…”

On the reactive adsorption of ammonia on activated carbons modified by impregnation with inorganic compounds

“…[12][13][14][15]. Indeed bands related to ammonia and ammonium are seen on the FTIR spectra of the exhausted samples at $1200 cm À1 , 1460 cm À1 , 1600 cm À1 , and 3200-3700 cm À1 (Fig.…”

“…Those adsorbents include untreated zeolites, carbonaceous materials, and alumina [1,[8][9][10][11][12][13][14][15][16][17][18][19][20]. Ammonia adsorption was studied either from the air filtration standpoint or as a way to characterize the acid-base nature of an adsorbent.…”

MCM-41 impregnated with active metal sites: Synthesis, characterization, and ammonia adsorption

“…Historically, metal salts have been impregnated within activated carbons to provide active sites for chemisorption [18,19]. Metal salts that have been studied specifically for ammonia removal include zinc chloride [20] and basic copper carbonate [22].…”