TY - GEN
T1 - A novel recycling process of waste cement
AU - Yamasaki, Akihiro
AU - Iizuka, Atsushi
AU - Katsuyama, Yasuro
AU - Fujii, Minoru
AU - Yanagisawa, Yukio
PY - 2004/8/30
Y1 - 2004/8/30
N2 - A recycling process of waste cement by carbonation reaction with pressurized CO2 is discussed. It is found that the proposed process consists of two main reactions. The first is the extraction of calcium ions from waste cement particles in water slurry by pressurized carbon dioxide. The second is the precipitation of calcium carbonate (CaCO3) by reducing the pressure of CO2. The product, CaCO3 can be recycled as a raw material for cement production. The results show that the extraction process can be proceeded with relatively high rates in the initial 10 minutes of the reaction time, where the concentration of calcium ions exceeded thermodynamic solubility.
AB - A recycling process of waste cement by carbonation reaction with pressurized CO2 is discussed. It is found that the proposed process consists of two main reactions. The first is the extraction of calcium ions from waste cement particles in water slurry by pressurized carbon dioxide. The second is the precipitation of calcium carbonate (CaCO3) by reducing the pressure of CO2. The product, CaCO3 can be recycled as a raw material for cement production. The results show that the extraction process can be proceeded with relatively high rates in the initial 10 minutes of the reaction time, where the concentration of calcium ions exceeded thermodynamic solubility.
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M3 - Conference contribution
AN - SCOPUS:4143083699
SN - 0816909423
T3 - 2004 AIChE Spring National Meeting, Conference Proceedings
SP - 2440
EP - 2448
BT - 2004 AIChE Spring National Meeting, Conference Proceedings
T2 - 2004 AIChE Spring National Meeting, Conference Proceedings
Y2 - 25 April 2004 through 29 April 2004
ER -