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Absorption Characteristics of Ammonia-Water System in the Cylindrical Tube Absorber
Ki-BongLee,전병희,Jae-CheolLee,Chan-JinPark,김성현 한국화학공학회 2002 Korean Journal of Chemical Engineering Vol.19 No.1
Experimental analysis was performed in a cylindrical tube absorber which is considered to be suitable for the bubble mode. Characteristics such as concentration, temperature, and pressure were measured and they reflected the condition of absorber well. The variation of characteristics was conspicuous near the inlet region of the ammonia gas. The ammonia gas and the solution flowed cocurrently and countercurrently and the results were compared.
Ji Hong Kim,Yun Jeong Choi,Ji Sun Im,Ayoung Jo,Ki-BongLee,Byong Chol Bai 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.88 No.-
In this study, petroleum pitch-based activated carbon was prepared, and the correlation between themolecular weight of the pitch and the specific surface area of the prepared activated carbon wasconsidered. The petroleum pitch was prepared by thermal synthesis of PFO (pyrolysis fuel oil) at380 430 C to control the molecular weight of the pitch, and the product was analyzed by MALDI-TOF(matrix-assisted laser desorption/ionization-time offlight). The activation proceeded by using KOH at850 C for 1 hour, and the pore structure of the prepared activated carbon was characterized by theBrunauer–Emmett–Teller (BET) method. The pitch synthesized at low temperature had a high specificsurface area to 1855 m2/g due to the presence of volatile compounds with values of 128 256 m/z, whichformed cavities upon volatilization.