활성탄 제조 방법

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활성탄 제조 방법

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Introduction
Experimental
Results and discussion
Conclusion

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Introduction
PVC is widely used in many fields (low price, mechanical properties)
When combusted, produces many detrimental contaminants (especially dioxin)
To remove chloride completely from the waste PVC
ACF was prepared from PVC pitch by spinning, stabilization, carbonization and steam activation
Such PVC based ACF was tested for De-SOx.
다이옥신계 화합물(PCDD) 퓨란계 화합물(PCDF)
Experimental
Heat-treatment of PVC
- Material
PVC with three additives {polyvinyl alcohol (400 ppm),
organic peroxide (300 ppm) and phenol based antioxidant
(200 ppm)}
- The treatment conditions
The first and second stages were 250270 °C for 25 h and
360430 °C for 2 h by using TG/DSC (heating rate: 5 °C/min
; atmosphere: N2)
Preparation PVC pitch and its ACFs
The resultant pitch (softening point: 218 °C)
Spun (nozzle: 0.3×0.9 mm)
Stabilized up to 320 °C (0.5 °C/min) in air
Carbonized up to 900 °C (10 °C/min) in Ar
Activated with steam at 900 °C for 3090 min
(H2O:N2=60:100).
Analysis method
Thermal decomposition process - TG/DSC
- HCl was trapped in pure water, NaOH titration.
Morphologies - SEM
Residual chlorine content and molecular weight distribution of PVC based pitch
- The cylinder combustion-ion chromatography (CMICG) and Tof-Mass
Surface area and pore size distribution - BET
Removal of SOx
SO2 removal was carried out at 60 °C in a fixed bed flow reactor
ACFs (0.1 g) were packed in a reactor tube
The concentrations at inlet (C0) and outlet (C) were measured continuously by FPD

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