study on solid adsorbent for co2-capture from post ... · 2nd post combustion capture conference ....

2nd Post Combustion Capture Conference September 17th-20th, 2013

Takeshi Okumura Kawasaki Heavy Industries, Ltd. (KHI)

Study on Solid Adsorbent for CO2-Capture from

Post Combustion Gases Utilizing Low-Temperature Thermal Energy

2

Outline

1.About our Company

2.Basic Technology

3.The KCC System

4.CO2 Capture Performance Test

5.CO2 Capture Energy

6.Feasibility Study of the KCC Application

7.Conclusions

3

1． About our Company

Motorcycle& Motorcycle& EnginesEngines

AerospaceAerospace

RollingRolling StockStock

Gas Turbine &MachineryGas Turbine &MachineryPlant & InfrastructurePlant & Infrastructure

10

Ship & Ship & Offshore StructureOffshore Structure

9 16

2012FYNet Sales

7

19%20

10

OthersOthers

Precision MachineryPrecision Machinery

10

Motorcycle& Motorcycle& EnginesEngines

AerospaceAerospace

RollingRolling StockStock

Gas Turbine &MachineryGas Turbine &MachineryPlant & InfrastructurePlant & Infrastructure

10

Ship & Ship & Offshore StructureOffshore Structure

9 16

2012FYNet Sales

7

19%20

10

OthersOthers

Precision MachineryPrecision Machinery

10

4

2．Basic Technology

CO2 Concentration ：1000 - 5000 ppm

KCC

Original adsorbent enables selective CO2 adsorption

Technology developed for a closed/semi-closed space

Gases CO2

CO2

CO2

CO2

CO2

CO2

CO2

CO2

CO2

CO2

CO2 free Gas

Original Adsorbent (An amine-coated porous material)

Aircraft cabin Office air-conditioning

Submarine Life Support

Kawasaki CO2 Capture

5

3．The KCC System

CO2 desorption at low temperature (e.g., 60 oC)

Applicable use of low-temperature waste heat

CO2

Desorption

Alternately

Steam Adsorption

Flue Gas

(60 oC, 20 kPa) Fixed-bed adsorbent (Our Original)

CO2 CO2

CO2 Free Gas

Alternately adsorb and desorb CO2 by mode switching

6

Superior adsorption performance for CO2 concentration between 0.1% and 50% confirmed by lab testing.

Adapted to Wide Range of CO2 Concentration

Application of KCC to Post-Combustion gases

KCC System

Gas Engine

Living Space

Thermal Power Plant

Cement Plant

Chemical Plant 0.1%

5% 13%

20%

50%

CO2

Our target

Our target

7

4．CO2 Capture Performance Test Photo of the 10 t CO2/day bench-scale test plant

6.5 m (W)×7.5 m (L)×12 m (H)

Adsorption tower

8

System Chart of the Bench-Scale Test Plant

Coal-fired flue gas

Gas heater

Condenser

Stack

Adsorption tower

Water Boiler

Steam generator

CO2

Vacuum pump

Fan CO2 free gas

：Coal-fired flue gas ：Steam for CO2 recovery ：CO2 free gas ：Captured CO2

Bag filter

Steam

9

Test Conditions and Measurement Parameters

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

＜Test Conditions＞

Fin Nm3/h Flue gas flow rate

Tgin oC Flue gas flow temperature

Cin % Concentration of CO2 in the flue gas

Fout Nm3/h Flow rate of CO2-free gas

Cout % Concentration of CO2 in CO2-free gas

Tvin oC Steam temperature

TS1-TS4 oC

Adsorbent temperature (4 points[A, B, C, and D]on the same plane)

＜Main measurement Items＞ Adsorption tower

Flue gas Fin, Tgin, Cin

Fout, Cout

TS1

TS2

TS3

TS4

CO2 free gas

Adsorbent

TS1A TS1B

TS1C TS1D

90 degrees

CO2

Steam

10

0

0.2

0.4

0.6

0.8

1

0 5 10 15 20Adsorpt ion t ime [min]

Ratio

of C

O2

conc

entr

atio

nCo

ut/C

in

Case1Case2Case3

CO2 Adsorption Properties

Close to saturation

Desorption Process

100% adsorption of CO2

<Breakthrough curves, ratio of CO2 concentration>

The KCC adsorbent captures CO2 in the flue gas

20

30

40

50

60

70

0 4 8 12Adsorpt ion t ime [min]

Adso

rben

t te

mpe

ratu

re（m

ean

valu

e） [

℃]

Case2 TS1Case2 TS2Case2 TS3Case2 TS4

20

30

40

50

60

70

0 4 8 12Adsorpt ion t ime [min]

Adso

rben

t te

mpe

ratu

re（m

ean

valu

e） [

℃]

Case2 TS2ACase2 TS2BCase2 TS2CCase2 TS2D

Adsorption Temperature <TS1–TS4, mean value>

<TS2A–TS2D>

TS2A TS2B

TS2C TS2D

90 degrees

Adsorption tower

Flue gas Fin, Tgin, Cin

Fout, Cout

TS1

TS2

TS3

TS4

CO2 free gas

Adsorbent

CO2

Steam

11

12

0

2

4

6

0 5 10 15Capacity of CO2 Capture ［t/ d］

Ther

mal

Ene

rgy

requ

ired

for

CO2

Capt

ure

［GJ/

t-CO

2］

Thermal Energy Required for CO2 Capture

<Thermal Energy required for CO2 Capture with capacity of CO2 Capture>

Amine solution systems (MEA)

Nearly half

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<KCC Moving-Bed System> <Bench plant>

Target：2016 The Beginning of Commercialization

KCC Moving Bed System

CO2 Free Gas

Steam

CO2

Conveyor

Gas for Adsorption Reactor

Desorption Reactor

Adsorbent Dryer

Drying

5 t-CO2/d

Adsorption Reactor

Desorption Reactor

14

CO2

Capture Plants

Thermal Energy Electric Power

Flue Gas

CO2

CO2 Capture Energy

+

Confirmed by Bench-Plant Test

Feasibility Study CO2 Capture Energy (1) Cement Plant (2) Gas Engine

5．CO2 Capture Energy

(Steam, etc.) (Pump or Fan, etc.)

15

Clinker Cooler Kiln

Boiler

Exhaust steam

Exhaust gas

Turbine

Clinker：6500 t/d

CO2

CO2：60 t/h

KCC Moving-

Bed System

Electric Power 1.6 GJ/t-CO2

(Primary Energy)

Thermal energy ＋ Electric Power ＝ 1.6 GJ/t-CO2

Waste Heat：Exhaust steam

<The CO2 Capture Energy>

MEA Extraction steam

5．Feasibility Study of KCC Application (1) Cement Plant

60oC

16

Fuel Gas

Green Gas Engine

Electric Power

Steam

CO2

Exhaust Gas

Waste Heat

KCC Moving-

Bed System

<Trigeneration System>

・Beverage ・Welding gas ・Dry ice etc.

7800 kW

3.5 t/h

The CO2 Capture Energy：1.3 GJ/t-CO2

3.2 t/h

(2) Gas Engine

Cooling Water (under 100 oC)

CO2 as a commercial product

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7．Conclusion • Our original adsorbents capture CO2 from

post-combustion gas.

• The adsorbent regenerates using 60 oC steam.

• The thermal energy required for CO2 capture by the KCC system is nearly half compared with amine solution systems using MEA.

• From the feasibility study, we find that the CO2 capture energy is 1.6 GJ/t-CO2 for cement plant and 1.3 GJ/t-CO2 for gas engine.

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Thank you for your attention.