Synthesis of precipitated calcium carbonate (PCC) nano-particles using turbo-mixing reactive precipitation
Calcium carbonate (CaCO3) is a crystalline compound appear abundantly in nature substance mostly in sedimentary rocks which comprise more than 4% of the earth’s crust throughout the world. Calcium carbonate is one of the most extensively studied inorganic compounds because of its importance in th...
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| 格式: | Thesis |
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| 語言: | English |
| 主題: | |
| 在線閱讀: | http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/72437/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/72437/2/Full%20text.pdf |
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| 總結: | Calcium carbonate (CaCO3) is a crystalline compound appear abundantly in nature
substance mostly in sedimentary rocks which comprise more than 4% of the earth’s
crust throughout the world. Calcium carbonate is one of the most extensively studied
inorganic compounds because of its importance in the various fields and industrial
processes due to its large range of applications. In recent decades, conventional
productions of the precipitated calcium carbonate (PCC) only manage to produce
particle size not less than 200 nm. In this thesis, an innovative and novel technology
method of processing called Turbo-Mixing Reactive Precipitation (TMRP) design
proposed as an alternative to this current processing or conventional productions of fine
precipitated calcium carbonate (nano-PCC) in turbo-mixing conditions. In the TMRP
process, nano-PCC is fabricated using gas-liquid-solid systems (precipitation) of the
calcium hydroxide slurry (Ca(OH)2) or better known as “milk of lime” in a stirred tank
batch reactor system. Carbon dioxide and nitrogen gas is introduced into the tank
through bubbled into the “milk of lime” in the reactor tank. The key research of this
study explored new methodologies and optimization the influence parameters in the
production of nano-PCC using TMRP technique. The experimental result indicated that
the most reactive of quicklime can be obtained by calcined at 1100 °C with 60 minutes
of soaking time for sample sized range between -30+20 mm. An average particle size
approximately 26.79 nm of CaCO3 nanoparticles was successfully produced by the 15
ℓ/min flowing rate of CO2 gas and O2-free N2 gas, 0.60 M concentrations of Ca(OH)2
slurry and 900 rpm stirring rotation speed at low precipitation temperature (10 ±5 ºC). |
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