22P080-P
High efficient CO2 decomposition by plasma (LAMP)
プラズマ（LAMP）による高効率CO2削減
Shunjiro Ikezawa
池澤 俊治郎Department of Electronics and Information Engineering, Chubu University
1200 Matsumoto, Kasugai 487-8501, Japan
中部大学・電子情報工学科・〒487-8501 春日井市松本町1200

We have studied the rate of decomposition of carbon dioxide using LAMP ( Large Atmospheric MicrowavePlasma ) of 600W. CO2 decomposition produces C and CO. And KH instability is produced in it. The results
show the high efficient CO2 decomposition over 50% by measuring of CO2 content with LAMP on and off. Theenergy is estimated between 600W and CO2 decomposition. Because of high density atmospheric microwave
plasma and the turbulent effect, the energy estimation will be achieved in LAMP.

1. Introduction
While the synthetic revolutionary strategy for CO2
decrease by green algae has been discussed as road map
in Nagoya city [1], however there are many researchesof CO2 decomposition by plasma using DBD (dielectricbarrier discharge) [2]. As industrial application, a cheap
apparatus and high efficiency are required. So LAMP isdeveloped, and the energy is estimated here. The
fruitful result will be obtained with the high density
plasma and the turbulent effect.
2. Experimental apparatus
ModeTE10
2.4 5GHz, 600W

by which the photo-spectra, the instability signal, andthe length of LAMP were measured. The results weresummarized in [3]. Large flow ( ~50L/m ) of cheap airgas was introduced from the gas port with CO2 gas.
The high efficient decomposition will come from thehigh density plasma by atmospheric microwave
plasma [4] and the turbulence [5]. LAMP was on-off
according to magnetron on-off.

3. Energy estimation
Estimation is valued as follows.
CO2 / mol is 44g and 22.4L. The decomposition
value ( D.V.) of CO2 will be ¥2,000/ton [6]. So, theD.V. of CO2/22.4L is,
D.V. of CO2=¥0.088/22.4L

Air&CO2,H2(1)The electric value (E.V.) in industry will be¥15/kWh. So, the E.V. of magnetron 600W is,spectroscope

microphone

LAMP
sleeveE.V. of 600W=¥0.15/min

In the experiment of LAMP with the high density
and the turbulence, when the large flow CO2 gas of
44.8 L/m (two times of (1)) will be decomposed,
the D.V. of CO2 /44.8L exceeds the E.V. of 600W.
D.V. of CO2/44.8L =¥0.176 ＞E.V.
of 600W=¥0.15/min

Fig. 1. Experimental apparatus（LAMP）.
Fig.1 is the photo figure of LAMP. As the electricalsource, a magnetron 2M213 of mean power 600 W
and frequency 2.45GHz was used on the market andcheap. The wave form was pulse modulated of 60Hz
and the duty 50%. A spectroscope ( Ocean optics
usb2000+ ), a microphone, and a sleeve were mounted,

(2)

(3)

4. High efficient CO2 decomposition
The efficiency is measured by high density CO2apparatus ( XP3140 ). The results are shown in Fig.2and Fig.3. Air flow is constant at 35L/m, CO2 flow
increases as 3, 6, 9 L/m. The efficiency decreases as
72.5, 67.8, 28.6%, respectively shown in Fig.2.
When Air flow changes, the results are shown in Fig.3.
CO2 flow is constant at 5L/m, Air flow increases as 20,

30, 40 L/m. The efficiency increases as 38.5, 39.0,75.0 %, respectively shown in Fig.3.

2520

Air 35co2 9LAMPoff

LAMP onReferences

28.6%

Air 35co2 6co2 [%]151067.8%5Air 35
co2 372.5%0020406080100120

140

時間 [s]

Fig.2 Change of CO2 content in LAMP when CO2 flowchanges（ decomposition efficiency ：28.6% , 67.8％, 72.5% ）LAMP ( ON)30

LAMP （OFF)25

Air:20L/m
CO2:5L/m

CO2 content(%)

2038.5％

15

Air:30L/m
CO2:5L/m

39.0％
10

Air:40L/m
CO2:5L/m

575.0%

0050

Acknowledgments
The author would like to thank the President
Takayoshi SHIINA of Hiatec company to discuss atInnovation Japan 2011 and to produce LAMP into
the world wide.

100Time (sec)

150

200Fig.3 Change of CO2 content in LAMP when Air flowchanges （ decomposition efficiency ： 38.5 ％ ,39.0%,75.0% ）5. Discussions and conclusion
LAMP is cheap and high efficient apparatus forCO2 decomposition. The results in Fig.2 and Fig.3
are explained as flows.
When CO2 flow increases with constant Air flow,
the load of decomposition will increase, so, theefficiency decreases in Fig.2. When Air flow
increases with constant CO2 flow, the turbulent
effect which will increases the effective collisions
between atoms with St. numbers decreasing inFig.3.
The energy estimation will be achieved when CO2
flow is constant at 40L/m, and Air flow changes inlarge flow.

[1] T. Takeuchi, S. Watanabe, Road map of Nagoya
for revolutionary strategy of CO2 (2011,May).
[2] O. Sakai et al., J.Phys.D: Appl.Phys. 42 (2009) 1; J.Y.Wanget al.,J. of Catalysis, 185 (1999) 152.
[3] S. Ikezawa et al., Proc. of ISSP 2011 , pp.28-31[4] M.Iwasaki, M.Hori et al., Appl. Phys. Lett., 92(2008)
081503-1.
[5] S. Takamura et al., Plasma and Fusion Research, 3(2008)
012; H. Yamashita et al., Proc. R. Soc. Lond. A,431(1990)301.
[6] Web CO2 Trade Price JBIC.