RG/WP Poster presenters Evaluating the Process of ACQ-Treated Woods with TGA and CEM Analysis...
11
RG/WP Poster presenters RG/WP Poster presenters Evaluating the Process of ACQ- Evaluating the Process of ACQ- Treated Woods with TGA and CEM Treated Woods with TGA and CEM Analysis Analysis Department of Forest Products Department of Forest Products Science, National Chiayi Science, National Chiayi University, 300 Syuefu Rd., University, 300 Syuefu Rd., Chiayi City 60004, Taiwan, ROC Chiayi City 60004, Taiwan, ROC Han Chien Lin Tsang-Chyi Shiah and Han Chien Lin Tsang-Chyi Shiah and Jung Ting Tsai Jung Ting Tsai
-
date post
15-Jan-2016 -
Category
Documents
-
view
213 -
download
0
Transcript of RG/WP Poster presenters Evaluating the Process of ACQ-Treated Woods with TGA and CEM Analysis...
RG/WP Poster presentersRG/WP Poster presenters
Evaluating the Process of ACQ-Treated Evaluating the Process of ACQ-Treated Woods with TGA and CEM AnalysisWoods with TGA and CEM Analysis
Department of Forest Products Science, Department of Forest Products Science, National Chiayi University, 300 Syuefu Rd., National Chiayi University, 300 Syuefu Rd.,
Chiayi City 60004, Taiwan, ROCChiayi City 60004, Taiwan, ROC
Han Chien Lin Tsang-Chyi Shiah and Han Chien Lin Tsang-Chyi Shiah and Jung Ting TsaiJung Ting Tsai
To provide an understanding of To provide an understanding of the fundamental thermal behaviourthe fundamental thermal behaviour and and the disposal-end productsthe disposal-end products of ACQ-treated woods, this study is of ACQ-treated woods, this study is comprised of two categories of examination. comprised of two categories of examination.
IntroductionIntroduction
The first is related to the study of thermal decomposition. It The first is related to the study of thermal decomposition. It examines the effectiveness of the pyrolysis of ACQ-treated examines the effectiveness of the pyrolysis of ACQ-treated woods and its preservatives,woods and its preservatives,using thermogravimetricusing thermogravimetricanalysis (TGA) under different thermalanalysis (TGA) under different thermaldecomposition conditions decomposition conditions (nitrogen(nitrogenor air, and 5 or 40 or air, and 5 or 40 ooC/min),C/min),and the use of Energyand the use of EnergyDispersive X-ray Spectrometer (EDX)Dispersive X-ray Spectrometer (EDX)to examine certain residualto examine certain residualelements of the char. elements of the char.
1/21/2
Perkin-elmer Pyris 1 TGA
The second is related to the research in combustion emissions from ACQ-The second is related to the research in combustion emissions from ACQ-treated woods. The emissions from the discharge gas during the ACQ-treated woods. The emissions from the discharge gas during the ACQ-treated specimen combustion were investigated using the treated specimen combustion were investigated using the Continuous Continuous Emission MonitoringEmission Monitoring (CEM) techniques. (CEM) techniques.
1/21/2
Fig. 1. Experimental diagrams of emissions gas measuring apparatus.Fig. 1. Experimental diagrams of emissions gas measuring apparatus.
IntroductionIntroduction
Aim of workAim of work
Our goal was to acquire fundamental knowledge of Our goal was to acquire fundamental knowledge of the thermal behaviourthe thermal behaviour and and the gas emitted from air the gas emitted from air pollutionpollution of ACQ-treated woods hopefully, while at of ACQ-treated woods hopefully, while at the same time obtaining the same time obtaining a disposal-end practicea disposal-end practice ((residual elementsresidual elements) reference for the char.) reference for the char.
ResultsResults 1/51/5
0 200 400 600 8000
20
40
60
80
100
Temperature (oC)
Wei
ght
(%)
Der
ivat
ive
wei
ght
(%
/min
)
: Japanese cedar, : ACQ specimen.
DTG Curve
TGA and DTG curves for Japanese cedar and ACQ specimen with 5 oC/min of heating rate in either nitrogen (left) or air (right) atmosphere.
Legends:Note:
Fig. 2.
TGA Curve
In nitrogen atmosphere
In nitrogen atmosphereIn air atmosphere
ACQ specimen: Japanese cedar treated with ammoniacal copper quats (ACQ-1).
0 200 400 600 800
-5
-4
-3
-2
-1
0
In air atmosphere
0 200 400 600 800
Temperature (oC)
In air atmosphere
0 200 400 600 800
0 200 400 600 8000
20
40
60
80
100
Temperature (oC)
Wei
ght
(%)
Der
ivat
ive
wei
ght
(%
/min
)
DTG Curve
TGA and DTG curves for ACQ specimen in nitrogen and airarmosphere with either 5 (left) or 40 (right) oC/min of heating rate.
Legends:Notes: Abbreviations of ACQ specimen are the same as Figure 2.
Fig. 3.
TGA Curve
(nitrogen): in nitrogen atmosphere; (air): in air atmosphere.
5 oC/min of heating rate
5 oC/min of heating rate 40 oC/min of heating rate
40 oC/min of heating rate
: ACQ specimen (nitrogen), : ACQ specimen (air).
0 200 400 600 800
-40
-30
-20
-10
0
40 oC/min of heating rate
0 200 400 600 800
Temperature (oC)
40 oC/min of heating rate
0 200 400 600 800
ResultsResults 2/52/5
0 200 400 600 8000
20
40
60
80
100
Temperature (oC)
Wei
ght
(%)
Der
ivat
ive
wei
ght
(%
/min
)
DTG Curve
TGA and DTG curves for ACQ-1 with 5 and 40 oC/min ofheating rate in either nitrogen (left) or air (right) atmosphere.
Legends:Notes: Abbreviations of ACQ-1 are the same as Figure 2.
Fig. 4.
TGA Curve
In nitrogen atmosphere In air atmosphere
In nitrogen atmosphere In air atmosphere
: ACQ-1 (5 oC), : ACQ-1 (40 oC).
(5 oC): 5 oC of heating rate; (40 oC): 40 oC of heating rate.
0 200 400 600 800
-50
-40
-30
-20
-10
0
In air atmosphere
0 200 400 600 800
Temperature (oC)
In air atmosphere
0 200 400 600 800
0 200 400 600 8000
20
40
60
80
100
Temperature (oC)
Wei
ght
(%)
Der
ivat
ive
wei
ght
(%
/min
)
DTG Curve
TGA and DTG curves for BKC and CuO with 5 and 40 oC/min ofheating rate in either nitrogen (left) or air (right) atmosphere.
Legend:
Notes: BKC: N-alkyl benzyl dimethyl ammonium chloride; CuO: copper oxide.
Fig. 5.
TGA Curve
In nitrogen atmosphereIn air atmosphere
In nitrogen atmosphere In air atmosphere
: BKC (5 oC), : CuO (5 oC),: BKC (40 oC), : CuO (40 oC).
(5 oC): 5 oC/min of heating rate; (40 oC): 40 oC/min of heating rate.
0 200 400 600 800-75
-60
-45
-30
-15
0
In air atmosphere
0 200 400 600 800
Temperature (oC)
In air atmosphere
0 200 400 600 800
ResultsResults 3/53/5
ResultsResults 4/54/5
Tem
pera
ture
(o C
)
Combustion time (Sec)
0
100
200
300
O2
(VO
L %
) 20.7
¡ã¡ã0
1718192021
CO
2 (V
OL
%)
0.2
0 100 200 300 4000
1
2
3
4
CO gas
Em
issi
on c
onte
nts
(p
pm)
Combustion time (Sec)
0
100
200
300
SO2 gas
-1
0
1
2
NOx gas
Fig. 6. Relationships between combustion time and temperature, O2, CO2 as well as emission contents for wood and ACQ-specimen.
Note: Abbreviations of ACQ-1 are the same as Figure 2.Legends: : Japanese cedar, : ACQ-specimen.
0 100 200 300 4000
20
40
60
Tem
pera
ture
(o C
)Combustion time (Sec)
: Japanese cedar, : ACQ-1,
Fig. 7. Relationships between combustion time and emission gas temperature, O2, CO2 concentration for ACQ wood preservatives and the main components of ACQ-1.Legends:
Notes: Abbreviations of ACQ are the same as Figure 2.ACQ-1: the type 1 of ammoniacal copper quats;BKC: N-alkyl benzyl dimethyl ammonium chloride.
0
100
200
300
O2
(VO
L %
) 20.7
¡ã¡ã0
1718192021
CO
2 (V
OL
%)
0.2
: CuO, : BKC.
0 100 200 300 400
Combustion time (Sec)
20.7
¡ã¡ã
CO
2 (V
OL
%)
0.2
0 100 200 300 4000
1
2
3
4
ResultsResults
5/55/5
CO gas
Em
issi
on c
onte
nts
(p
pm
)
Combustion time (Sec)
0
100
200
300
SO2 gas
NOx gas
0 100 200 300 400
CO gas
Combustion time (Sec)
SO2 gas
-1
0
1
2
NOx gas
Fig. 8. Relationships between combustion time and emission contents for ACQ wood preservatives and the main components of and ACQ-1.Note: Legends and abbreviations are the same as Figure 2 and 7.
0 100 200 300 4000
20
40
60
NOx gas was about 25-30 ppmNOx gas was about 25-30 ppm
CO was about 100-160 ppmCO was about 100-160 ppm
SOSO22 emitted gas was zero emitted gas was zero
Tem
pera
ture
(o C
)
Combustion time (Sec)
: Japanese cedar, : ACQ-1,
Fig. 7. Relationships between combustion time and emission gas temperature, O2, CO2 concentration for ACQ wood preservatives and the main components of ACQ-1.Legends:
Notes: Abbreviations of ACQ are the same as Figure 2.ACQ-1: the type 1 of ammoniacal copper quats;BKC: N-alkyl benzyl dimethyl ammonium chloride.
0
100
200
300
O2
(VO
L %
) 20.7
¡ã¡ã0
1718192021
CO
2 (V
OL
%)
0.2
: CuO, : BKC.
0 100 200 300 400
Combustion time (Sec)
20.7
¡ã¡ã
CO
2 (V
OL
%)
0.2
0 100 200 300 4000
1
2
3
4
ConclusionsConclusions
1.1. The char of ACQ-treated woods at air atmosphere were less than that The char of ACQ-treated woods at air atmosphere were less than that at nitrogen. The pyrolysis temperature for the heating rate of 5 at nitrogen. The pyrolysis temperature for the heating rate of 5 ooC/min C/min was lower than that of 40 was lower than that of 40 ooC/min, but both them were with the same C/min, but both them were with the same amount of char.amount of char.
2.2. The EDX analysis of ACQ-treated woods was obtained that the main The EDX analysis of ACQ-treated woods was obtained that the main element was C, 77.89 %, and that the relative proportion of Cu was element was C, 77.89 %, and that the relative proportion of Cu was 2.67 %. The main char of the ACQ-1 was Cu, 50.14 % which was 2.67 %. The main char of the ACQ-1 was Cu, 50.14 % which was almost unable to be combusted toward the end of the combustion.almost unable to be combusted toward the end of the combustion.
3.3. In the results of CEM, the emission gas temperature of ACQ-treated In the results of CEM, the emission gas temperature of ACQ-treated woods and ACQ-1 rose rapidly up and then slowed down to become a woods and ACQ-1 rose rapidly up and then slowed down to become a Plateau curve. Both OPlateau curve. Both O22 and CO and CO22 then approached the shape of a then approached the shape of a
Plateau curve until the end of the combustion time, as well as had a Plateau curve until the end of the combustion time, as well as had a close relationship during combustion. For both them of the maximum close relationship during combustion. For both them of the maximum value of the emission content during the combustion, the emission value of the emission content during the combustion, the emission quantity of CO was about 100-160 ppm, the SOquantity of CO was about 100-160 ppm, the SO22 emitted gas was zero, emitted gas was zero,
the peak for NOx gas was about 25-30 ppm.the peak for NOx gas was about 25-30 ppm.
RG/WP Poster presentersRG/WP Poster presenters
Evaluating the Process of ACQ-Treated Woods Evaluating the Process of ACQ-Treated Woods with TGA and CEM Analysiswith TGA and CEM Analysis
Department of Forest Products Science, Department of Forest Products Science, National Chiayi University, 300 Syuefu Rd., National Chiayi University, 300 Syuefu Rd.,
Chiayi City 60004, Taiwan, ROCChiayi City 60004, Taiwan, ROC
Han Chien Lin 1 Tsang-Chyi Shiah and Han Chien Lin 1 Tsang-Chyi Shiah and Jung Ting TsaiJung Ting Tsai
Thank you!Thank you!
Have a good time in TaiwanHave a good time in Taiwan
