Japan-Norway Energy Science Week 2015 May 27th-28th, 2015 KCC …injapan.no/energy2015-day2/files/2015/06/ESW-Okumura-CCS.pdf · 2019. 11. 21. · 7. Feasibility Study Fuel Gas Gas

Japan-Norway Energy Science Week 2015

May 27th-28th, 2015

KCC (Kawasaki CO2 Capture)

System Utilizing Low Temperature

Waste Heat

Takeshi Okumura Kawasaki Heavy Industries, Ltd.

© 2015 Kawasaki Heavy Industries, Ltd. All Rights Reserved 2

OUTLINE

1.About Our Company

2. Introduction

3.Basic Technology

4.The KCC System

5.Fixed-bed Bench Test

6.Moving-bed Bench Test

7.Feasibility Study

8.Future Development

9.Conclusions


Ship & Offshore

Stracture 6.0%

Rolling Stock 8.1%

Aerospace 21.8%

Gas Turbines & Machinery

14.7%

Plant & Infrastructure Engineering

8.1%

Motorcycle & Engine 22.1%

Precision Machinery

9.1%

Others 9.7%

1. About Our Company

\1,486 Billion

(2014FY)


2. Introduction

Various methods have been developed.

Chemical absorption, Solid adsorption, Membrane separation, etc.

<CO2 Capture Technology>

Thermal Energy (Steam, etc)

Electric Power (Fan or Pomp, etc.)

+ CO2 Capture Energy =

Utilizing waste heat

as the Thermal Energy Energy saving system

<CO2 Capture Energy>

Required large energy consumption


3. Basic Technology

Aircraft cabin

Office air-conditioning

Submarine Life Support, etc.

CO2 Concentration : 1000-5000 ppm

Original adsorbent : An amine-impregnated porous material

Application to a high concentration CO2 gas (e.g., 13%)

KCC (Kawasaki CO2 Capture)

Kawasaki have developed the adsorbent technology

for more than 30 years.

<Closed/Semi-closed space>


4. The KCC System

CO2

Low-temperature Steam

Exhaust Gas

Adsorbent

(Our Original)

CO2 Free Gas

Adsorption Desorption

CO2

Adsorption

CO2

Desorption

CO2 desorption

at low temperature

(e.g., 60 oC)

Applicable use

of low-temperature

waste heat

<Features of KCC>

①Fixed-bed system : Suited to a small-scale plant

②Moving-bed system : Suited to a large-scale plant

<Selectable 2 systems>


5. Fixed-bed Bench Test

(1) Fixed-bed Bench Test Plant

Photo of the 10 t CO2/day bench-scale test plant

6.5 m (W)×7.5 m (L)×12 m (H)

Adsorption reactor


(2) System Chart and Test Conditions

Stack

Exhaust gas

Gas heater Condenser

Adsorption

Reactor

Water

Boiler

CO2

Vacuum

pump

Fan

CO2 free gas

Bag filter

Steam

<System Chart of the Test Plant>

<Test Conditions>

Case1 Case2 Case3

Flue gas flow rate Nm3/h 960 1700 2000

Concentration of CO2 in the flue gas % 12 13 16

Flue gas temperature oC 40 40 40

Steam temperature oC 60 60 60


(3) CO2 Adsorption Properties

0

0.2

0.4

0.6

0.8

1

0 5 10 15 20

Adsorption time [min]

Rati

o o

f C

O2

concentr

ati

on

Cout/

Cin

Case1

Case2

Case3

Close to saturation

Desorption Process

100% adsorption of CO2

<Breakthrough curves, ratio of CO2 concentration>

The KCC adsorbent captures CO2 in the flue gas


(4) Thermal Energy

0

2

4

6

0 5 10 15

Capacity of CO2 Capture ［t/d］

Therm

al Energ

y r

equir

ed

for

CO

2 C

aptu

re［G

J/t-

CO

2］

<Thermal Energy required for CO2 Capture

with capacity of CO2 Capture>

Conventional technology

(Amine solution systems (MEA))

Nearly half

Case1

Case2 Case3


6. Moving-bed Bench Test

(1) The KCC Moving-bed System

The adsorbent circulates around the equipment.

Exhaust gas

Steam

CO2

Dry gas

Adsorption Reactor

Desorption Reactor

Adsorbent Dryer

Conveyer

CO2-free gas

：After desorption

：After adsorption

：Before adsorption


(2) Moving-bed Bench Test Plant

<Photo of the bench-scale test plant>

Adsorption

Reactor

Desorption

Reactor

Objectives of this test

with the moving-bed system

(20 m height)

• CO2 adsorption from coal

combustion exhaust gas

• CO2 desorption from

adsorbents with low-

temperature steam (60 oC)


(3) System Chart and Test Conditions

Adsorption gas flow rate 530 Nm3/h

CO2 concentration of adsorption gas 13 %

Adsorption gas temperature 35 oC

Steam temperature 60 oC

<Test Conditions>

<System Chart of the Test Plant>

Condenser Heater

Exhaust gas

Water

Boiler Capture

pump

Fan Condenser Heater

Outside air

Fan

CO2 Desorption

Reactor

Adsorbent

Dryer

Adsorption

Reactor

Adsorbent

Steam


(4) Test Results (Adsorption)

• CO2 was adsorbed from coal combustion exhaust gas.

• The CO2 concentration in the gas of outlet was about 3%.

• The amount of adsorbed CO2 was about 3 t/day.

0

20

40

60

80

100

0

1

2

3

4

5

0 1 2 3

CO

2 c

on

ce

ntr

ati

on

(%

)

Am

ou

nt

of

ad

so

rbe

d C

O2

(t/

d)

Test time (hr)

Amount of adsorbed CO2

CO2 concentration at the inlet

CO2 concentration at the outlet


(5) Test Results (Desorption)

• The amount of captured CO2 was about 3 t/day.

• All the adsorbed CO2 in the adsorption reactor was

successfully captured in the desorption reactor.

• The concentration of the captured CO2 was 95% or more.

0

10

20

30

40

50

60

70

80

90

100

0

1

2

3

4

5

0 1 2 3

CO

2 c

on

ce

ntr

ati

on

(%

)

Am

ou

nt

og

ca

ptu

red

CO

2 (

t/d

)

Test time (hr)

CO2 concentration

Amount of captured CO2


7. Feasibility Study

Fuel Gas

Gas Engine

Electric

Power

CO2

Exhaust Gas

Waste Heat

KCC

Moving-

Bed

System

7800 kW

3.2 t/hCooling Water

(under 100 oC)

CO2 Capture Energy

：1.3 GJ/t-CO2

<CO2 capture from a gas engine utilizing waste heat>

The CO2 Capture Energy is the same as for other

plants by utilizing low temperature waste heat.

Calculation of the CO2

Capture Energy utilizing

low temperature waste

heat


8. Future Development

Laboratory

Teat Bench scale

Test

Practical test

50 ton/day

2014 2015 2019 2020-

500 ton/day

Large scale CCS

Thermal power plant,

Cement plant

Improvement

:Effiency, Economic Performance

Research

(Lab Bench)

Practical realization

(50 t/d test On the market)

Demonstration,

Commercialization

of large scale


9. Conclusions

• CO2 in the coal combustion exhaust gas was

captured with the KCC fixed-bed system and

moving-bed system using steam at a

temperature of 60oC.

• According to the feasibility study, the CO2

capture energy was 1.3 GJ/t-CO2 using steam

generated by the waste heat.

(Conventional technology : 4 GJ/t-CO2)

• We are going to conclude the practical test with

50 t/d scale facility by 2019.


Documents

Japan-Norway Energy Science Week 2015 May 27th-28th, 2015 KCC …injapan.no/energy2015-day2/files/2015/06/ESW-Okumura-CCS.pdf · 2019. 11. 21. · 7. Feasibility Study Fuel Gas Gas