HCl removal from biogas for feeding MCFCs: Adsorption on microporous materials

Hydrogen chloride removal from hydrogen gas by adsorption on hydrated ion-exchanged zeolites

“…During this process the catalyst is typically promoted with chlorine to enhance the process performance [10][11][12], however, this also comes along with the formation hydrogen chloride (HCl) impurities in the product streams. Besides the contamination of the product stream, HCl may cause severe corrosion, fouling and equipment damage, leading to potentially serious safety and environmental issues [10][11][12][13][14]. Therefore, removal of hydrogen chloride from hydrogen gas is of great importance for chemical industry and the environment.…”

“…Kim et al carried out HCl adsorption and desorption breakthrough experiments with 13X pellets packed beds at high pressure and gas velocities under nitrogen environment [43]. Micoli et al evaluated the HCl removal performance of Cu and Zn exchanged and impregnated 13X zeolite materials from nitrogen at low pressures for biogas purification [14].…”

Controllable growth of Na2CO3fibers for mesoporous activated alumina ball modification towards the high-efficiency adsorption of HCl gas at low temperature

“…Aerwards, the escaped HCl was absorbed by 1 L deionized water in the adsorption bottle, and the concentration C t of HCl in the outlet gas at that moment was ascertained synchronously by detecting the change of the pH value in the adsorption solution. 35,36,42 Finally, the gas stream owed through the treatment bottle, ensuring no pollution to the environment before the vent.…”

“…[30][31][32][33] Lee 34 showed that the HCl capacity of NaOH/AC is about 6 times that of commercial alumina. However, Micoli et al 35,36 investigated the HCl adsorption performance of activated carbon impregnated with KOH, NaOH or Na 2 CO 3 , respectively. They suggested that the best adsorption performance for HCl adsorption was obtained by impregnating Na 2 CO 3 .…”

Biogas derived from municipal solid waste to generate electrical power through solid oxide fuel cells

“…Absorption in glycol solutions and the use of hygroscopic salts are other technologies for water removal [49,51]. • HCl and halide removal: Modified 13X zeolites, made by adding Cu or Zn by ion exchange or impregnation, and modified commercial active carbons, made by impregnation with KOH, NaOH, or Na 2 CO 3 solutions, can be used for HCl adsorption from biogas [52]. Zinc oxide has also been used for HCl removal.…”