Removal of hydrogen chloride from gaseous streams using magnesium-aluminum oxide.
Magnesium-aluminum oxide (Mg-Al oxide) obtained by thermal decomposition of Mg-Al layered double hydroxide (Mg-Al LDH) effectively removed HCl from gaseous streams. HCl removal was greater in the presence of added water vapor at all temperatures examined and increased with decreasing temperature in both the presence and absence of added water vapor. Wet and dry removal of gaseous HCl were attributed to the production of MgCl2 . 6H2O and MgCl2 . 4H2O, respectively. For the wet scrubbing process, the reconstruction reaction of Mg-Al LDH from Mg-Al oxide was the primary mechanism for increased HCl removal.
Kameda
Tomohito
T
Graduate School of Environmental Studies, Tohoku University, Aoba, Aramaki, Sendai, Japan. kameda@env.che.tohoku.ac.jp
Uchiyama
Naoya
N
Park
Kye-Sung
KS
Grause
Guido
G
Yoshioka
Toshiaki
T
D017607:Aluminum Compounds / Q000737:chemistry*; D000536:Aluminum Hydroxide / Q000737:chemistry; D000537:Aluminum Oxide / Q000737:chemistry*; D006851:Hydrochloric Acid / Q000737:chemistry / Q000302:isolation & purification*; D008274:Magnesium / Q000737:chemistry*; D017616:Magnesium Compounds / Q000737:chemistry*; D013696:Temperature; D018508:Water Purification
D017607:Aluminum Compounds; D017616:Magnesium Compounds; C110424:aluminum magnesium oxide; D000536:Aluminum Hydroxide; D008274:Magnesium; D000537:Aluminum Oxide; D006851:Hydrochloric Acid