effective technologies for conversion of hfc-23
TRANSCRIPT
PowerPoint Quan Hengdao
National Institute of Advanced Industrial Science and Technology (AIST), Japan
Beijing Institute of Technology, China
Contents
COF2
CF3I
Isocyanates
Background
1980 2006 2015
1
A5 CountryChina etal
2024 20482030 20402035
Target: reduce global temperature by 0.5 degrees by HFCs emission reduction in 2100.
A. Ozone Layer Depletion
B. Global Warming Potential
Characterizations of HFC-23
Critical temperature (Tc) 25.7
Viscosity/25°C(η) 14.4 μPa.s
Ozone depletion potentialODP 0
Global warming potentialGWP100 12400
Residence time 222 years
Table 1 Characters of HFC-23 (CHF3)
How to treat the existed HFC-23 ??
F-polymers
HF
Current research
South Africa 275 275 41,000 80,000
Other counties 290 290 110,000 180,000
World total
US Dept. of Interior, U.S. Geological Survey (USGS),
Mineral Commodity Summaries, Jan. 2006
Resource of F: 40 year ??,
How to protect F-resource ?
Traditional Current
Catalyst: e.g.CrF3
Low corrosive
Long lifetime
Low activity
R-FR-Cl cat.
confidential
Research area
PMFs ROCClFRf
+
reagent.
Release of toxic gases; Very expensive
Iodization with I2 3 CHF3 +2 I2 +O2 → 2 CF3I + 3 HF + CO2
CF3I
CHF3 can be recycled
As an important by-product of fluorine chemical industry, all the world
tend to seek HFC-23 transformation technology to deal with HFC-23
High temperature oxidation
COF2 is an important intermediate.
Pyrolysis or Co-pyrolysis
CF2=CF2 and CF3CF=CF2 are important
monomers.
COF2
Method
Hengdao Quan, Ni Zhang, etc. J. of Fluorine Chem. 176 (2015) 26–30. Ni Zhang, Xiaomeng Zhou, Hengdao Quan, Akira Sekiya. J. of Fluorine Chem. 178 (2015) 208–213.
Intermediates and products
Pyrolysis of HFC-23
F
F
F
F
F
F
CF3
F
F3C
F
F
CF3
CHF3
NH4F
F
F
F
F
CHF3
H2O
confidential
23
23
HFC-23
CF3IGWP<5
ODP≈0
A possible etching gas
The important components of
• Replacement in insulation gas
J. Lu. Investigation on the feasibility of trifluoroiodomthane (CF3I) for application in gas- insulated lines. PhD thesis, Cardiff University, 2015.
Applications of CF3I
Insulation gas play an important key role in Gas-insulated lines (GIL).
J. Lu. Investigation on the feasibility of trifluoroiodomthane (CF3I) for application in gas-insulated lines. PhD thesis, Cardiff University, 2015.
• Replacement in insulation gas
Applications of CF3I
Although the insulation performance is only about 0.75 to 0.80 times that of SF6, CF3I has better gas stability than SF6
H. Katagiri et al. IEEE Trans. Dielectr. Electr. Insul. 2008, 5: 1424 - 1429
• Replacement in insulation gas
J. Lu. Investigation on the feasibility of trifluoroiodomthane (CF3I) for application in gas- insulated lines. PhD thesis, Cardiff University, 2015.
Applications of CF3I
Iodization with I2
PMF
The catalyst is easy to accumulate carbon and inactivate.
The catalyst is unstable due to oxidization of carrier with O2.
Difficult to continuous production, serious pollution
Stable carrier porous metal fluoride (PMF), high activity of the catalyst, easy to continuous production
confidential
Iodization with I2
The Iodization of HFC-23 with I2 can generate CF3I and C2F5I, and the
total selectivity of CF3I and C2F5I is nearly to 100%.
CHF3 + I2 + O2 CF3I + C2F5I + CO2 +HF PMF
Chinese Patent ZL 200810056508; J. Fluorine Chem.2009,130:231-235
confidential
N2
O2
HFC-23
H2O
NaOH
I2
Process for preparing CF3I confidential
Applications of CF3I
Table 3 Candidates and blend components for low GWP refrigerants
CF3I offers potential as a blend component in combination with fluorinated olefins to suppress their flammability while minimizing GWP
• Replacement in refrigerants
James M. Calm. Inter. J of Refrigeration 2008, 31: 1123-1133
Applications of CF3I
%
Table 2 Flame extinguish concentration of FICs and Halon 1301
Moore T A et al. An update on NMERI cup-burner test results. Albuquerque, NM. 1996 Tapscott R. E. Best Values of Cup-Burner Extinguishing Concentrations. Albuquerque NM. 1999
• Replacement in halon extinguish
Applications of CF3I
N. Takechi et al. / Tetrahedron Letters 43 (2002) 4317–4319
• Trifluoromethylation reagent
• The pyrolysis of HFC-23 into COF2 is a good way to
transfer HFC-23 to useful F-compound and
intermediate, we have already build up a pilot plant of
COF2 (100 t/y).
continuous large production process of CF3I and C2F5I.
Our pilot plant can produce CF3I with purity from 99.0%
to 99.99% and the capcity with 50t/y.
Conclusions
Thank you!
National Institute of Advanced Industrial Science and Technology (AIST), Japan
Beijing Institute of Technology, China
Contents
COF2
CF3I
Isocyanates
Background
1980 2006 2015
1
A5 CountryChina etal
2024 20482030 20402035
Target: reduce global temperature by 0.5 degrees by HFCs emission reduction in 2100.
A. Ozone Layer Depletion
B. Global Warming Potential
Characterizations of HFC-23
Critical temperature (Tc) 25.7
Viscosity/25°C(η) 14.4 μPa.s
Ozone depletion potentialODP 0
Global warming potentialGWP100 12400
Residence time 222 years
Table 1 Characters of HFC-23 (CHF3)
How to treat the existed HFC-23 ??
F-polymers
HF
Current research
South Africa 275 275 41,000 80,000
Other counties 290 290 110,000 180,000
World total
US Dept. of Interior, U.S. Geological Survey (USGS),
Mineral Commodity Summaries, Jan. 2006
Resource of F: 40 year ??,
How to protect F-resource ?
Traditional Current
Catalyst: e.g.CrF3
Low corrosive
Long lifetime
Low activity
R-FR-Cl cat.
confidential
Research area
PMFs ROCClFRf
+
reagent.
Release of toxic gases; Very expensive
Iodization with I2 3 CHF3 +2 I2 +O2 → 2 CF3I + 3 HF + CO2
CF3I
CHF3 can be recycled
As an important by-product of fluorine chemical industry, all the world
tend to seek HFC-23 transformation technology to deal with HFC-23
High temperature oxidation
COF2 is an important intermediate.
Pyrolysis or Co-pyrolysis
CF2=CF2 and CF3CF=CF2 are important
monomers.
COF2
Method
Hengdao Quan, Ni Zhang, etc. J. of Fluorine Chem. 176 (2015) 26–30. Ni Zhang, Xiaomeng Zhou, Hengdao Quan, Akira Sekiya. J. of Fluorine Chem. 178 (2015) 208–213.
Intermediates and products
Pyrolysis of HFC-23
F
F
F
F
F
F
CF3
F
F3C
F
F
CF3
CHF3
NH4F
F
F
F
F
CHF3
H2O
confidential
23
23
HFC-23
CF3IGWP<5
ODP≈0
A possible etching gas
The important components of
• Replacement in insulation gas
J. Lu. Investigation on the feasibility of trifluoroiodomthane (CF3I) for application in gas- insulated lines. PhD thesis, Cardiff University, 2015.
Applications of CF3I
Insulation gas play an important key role in Gas-insulated lines (GIL).
J. Lu. Investigation on the feasibility of trifluoroiodomthane (CF3I) for application in gas-insulated lines. PhD thesis, Cardiff University, 2015.
• Replacement in insulation gas
Applications of CF3I
Although the insulation performance is only about 0.75 to 0.80 times that of SF6, CF3I has better gas stability than SF6
H. Katagiri et al. IEEE Trans. Dielectr. Electr. Insul. 2008, 5: 1424 - 1429
• Replacement in insulation gas
J. Lu. Investigation on the feasibility of trifluoroiodomthane (CF3I) for application in gas- insulated lines. PhD thesis, Cardiff University, 2015.
Applications of CF3I
Iodization with I2
PMF
The catalyst is easy to accumulate carbon and inactivate.
The catalyst is unstable due to oxidization of carrier with O2.
Difficult to continuous production, serious pollution
Stable carrier porous metal fluoride (PMF), high activity of the catalyst, easy to continuous production
confidential
Iodization with I2
The Iodization of HFC-23 with I2 can generate CF3I and C2F5I, and the
total selectivity of CF3I and C2F5I is nearly to 100%.
CHF3 + I2 + O2 CF3I + C2F5I + CO2 +HF PMF
Chinese Patent ZL 200810056508; J. Fluorine Chem.2009,130:231-235
confidential
N2
O2
HFC-23
H2O
NaOH
I2
Process for preparing CF3I confidential
Applications of CF3I
Table 3 Candidates and blend components for low GWP refrigerants
CF3I offers potential as a blend component in combination with fluorinated olefins to suppress their flammability while minimizing GWP
• Replacement in refrigerants
James M. Calm. Inter. J of Refrigeration 2008, 31: 1123-1133
Applications of CF3I
%
Table 2 Flame extinguish concentration of FICs and Halon 1301
Moore T A et al. An update on NMERI cup-burner test results. Albuquerque, NM. 1996 Tapscott R. E. Best Values of Cup-Burner Extinguishing Concentrations. Albuquerque NM. 1999
• Replacement in halon extinguish
Applications of CF3I
N. Takechi et al. / Tetrahedron Letters 43 (2002) 4317–4319
• Trifluoromethylation reagent
• The pyrolysis of HFC-23 into COF2 is a good way to
transfer HFC-23 to useful F-compound and
intermediate, we have already build up a pilot plant of
COF2 (100 t/y).
continuous large production process of CF3I and C2F5I.
Our pilot plant can produce CF3I with purity from 99.0%
to 99.99% and the capcity with 50t/y.
Conclusions
Thank you!