CaOling Project - First experiences on the 1,7MWt calcium ...oxyfbc.eu-projects.de/Portals/29/OxyFBC/11_Biezma... · Pereda Power Plant aiming to validate the technology in the 1MW’s

CaOling Project – Scope and Overview

CaOling Project - First experiences on the1,7MWt calcium looping pilot in La Pereda

2 9 | 0 6 | 1 2endesa Subdirección de Ingeniería e I+D

Subdirección de ingeniería e I+D

A. Sánchez-Biezma*, L. Diaz**, J. López***, B. Arias****, J. Paniagua*, M.Lorenzo**, J. Álvarez***, J.C. Abanades****

*Endesa Generación, Madrid, Spain.

**HUNOSA, Oviedo, Spain

***Foster Wheeler Energía S.L.U, Madrid, Spain.

**** Spanish Research Council (CSIC-INCAR), Oviedo, Spain.


CaOling Project - Development of Calcium looping

CaOling Project started on December 2009 as a three-years project to develop and demonstrate post-combustion calcium looping in a pilot-scale unit whichis fully integrated with a power plant.


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Partners:


Concept

CARBONATORCARBONATOREXISTINGEXISTING

CaCO3

Flue gas“without” CO2

OXY-FIREDCFBC

OXY-FIREDCFBC

Concentrated CO2

O2


3

CARBONATORCARBONATOREXISTINGPOWER PLANT

EXISTINGPOWER PLANT

CaOFlue Gas(FCO2)

Coal Air

CFBCCALCINER

CFBCCALCINER

CoalCaCO3

(F0)CaOPurge

2

Air

N2

ASUASU


CaOling Project. Work plan

WP1: Lab-Scale pilot testing

WP2: Sorbent Properties

WP3: Reactor modelling andscale-up tools

Leader Other partners


4

WP4: 1,7MWt Plant design and

erection

WP5: Experimental campaignsin the 1,7Mw test facility

WP6: Scaling parameters forindustrial plant demo

WP7: Coordination anddissemination

All

CaOling Project – Scope and OverviewLa Pereda CO2 capture pilot plant - Location


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The 1,7MWt experimental facility is located at the La Pereda power plant.

La Pereda is an existing 50MWe CFB power plant.

La Pereda CO2 capture pilot plant


6

FacilityArea

CaOling Project – Scope and OverviewLa Pereda pilot plant - Concept


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CaOling Project – Scope and OverviewLa Pereda CO2 capture pilot plant - Main equipment

ESP stack

Gas inlet tie point

Gas outlet tie point

Reactors

Metallic structure

Pipes andgas cooler


ESP stack

Gas outlet tie pointBurners and valveCO2 y O2 Tanks

Solid removal system

Gas outlet tie pointBurners and valve

skids

Coal and limestone feedingsystem

CO2 y O2 Tanks

Reactors


ESP stack

Gas outlet tie point

Propane Tank

Control and electric systems room

O2 & CO2 tanksGas outlet tie point

Fans

Solid removal system

O2 & CO2 tanks


Status of the pilot plant-Building finished in September 2011-Start of cold commissioning: October 2011- Start of hot commissioning: January 2012- Operational hours with coal combustion (dual fluidized bed mode): ~ 800 h- Operational hours in CO2 capture mode : ~ 160 h-Initial test carried out with the calciner in air mode- First validation under oxy mode in the calciner

La Pereda pilot plant – STATUS


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Carbonator temperature (ºC) 600-715

Carbonator superficial gas velocity (m/s) 2.0-4.0

Inlet CO2 volume fraction 0.12-0.14

Inlet SO2 concentration (mg/m3) 100-250

Inventory of solids in the carbonator (kg m-2) 100-1000

Maximum CO2 carrying capacity of the solids 0.10-0.70

CO2 capture efficiency 0.4-0.95SO2 capture efficiency 0.95-1.00

Main parameters in the carbonator reactor during CO2 capture tests


Effect of carbonator temperature Effect of inventory of solids on thecarbonator

0.8

0.9

1

cap

ture

eff

icie

ncy 710

730

Ca

rbo

na

tor

tem

per

atu

re(º

C)

0.8

0.9

1

cap

ture

eff

icie

ncy

800

1000

Inve

nto

ryo

fso

lid

s(k

g/m

2)

Results – dynamic testing


0.4

0.5

0.6

0.7

0.8

11:00 11:10 11:20 11:30 11:40 11:50

CO

2ca

ptu

ree

ffic

ien

cy

650

670

690

Ca

rbo

na

tor

tem

per

atu

re(º

C)

ECO2 eq

ECO2

Carbonator Temperature0.3

0.4

0.5

0.6

0.7

17:00 17:10 17:20 17:30 17:40C

O2

cap

ture

eff

icie

ncy

0

200

400

600

Inve

nto

ryo

fso

lid

s(k

g/m

2)

ECO2 eq

ECO2

Carbonator inventory


1 15

- Total inventory of solids in carbonator = 300-800 kg/m2- Average carbonator temperature= 670 ºC- Xave = 0.3-0.1

Results – steady state testing


0

0.2

0.4

0.6

0.8

10:00:00 11:00:00 12:00:00 13:00:00 14:00:00 15:00:00 16:00:00

CO

2ca

ptu

ree

ffic

ien

cy

0

3

6

9

12

CO

2vo

l%ECO2 eq

ECO2

CO2 in

CO2 out

Deliberate alterationof solid circulation rates

Restart of solidcirculation


0.95

1.00

0.12

0.15

SO2 capture in the Ca-looping facility

Results – SO2 capture


0.80

0.85

0.90

3:00 5:00 7:00 9:00 11:00 13:00 15:00

E SO

2

0

0.03

0.06

0.09

XC

aSO

4

ESO2 carb

ESO2 calc

Experimental

Calculated


0.3

0.4

0.5

0.6

,XN,X

CaS

O4

Xave

XN (Grasa et al 2006)

XCaSO4 experimental

XCaSO4 calculated

CaO utilization0.4

0.6

0.8

1

EC

O2

400

600

800

1000

1200

Inve

nto

ryo

fso

lids

(kg/

m2)

ECO2 eq

Evolution of sorbent utilization with “lifetime” of particles in the system


0.0

0.1

0.2

0 5 10 15 20 25 30 35

N th

Xav

e,X

0

0.2

11:10 11:20 11:30 11:40 11:50 12:00

0

200

400

Inve

nto

ryo

fso

lids

(kg/

m

ECO2 eq

ECO2

Carbonator inventory

dtXN

EFN

t

aveCa

tcarbCO

th 0

)(2Number of times that the inventory

of CaO is carbonated up to Xave


Calcination oxy mode

Results – oxycalcination


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Calcination air mode


• A flexible experimental facility has being constructed in LaPereda Power Plant aiming to validate the technology in the1MW’s size

• Successful proof of concept of postcombustion Ca-looping incontinuous mode of operation with two interconnectedCFBCs at the MWth scale.


CFBCs at the MWth scale.

• CO2 capture efficiencies over 90% achievable in a CFBcarbonator reactor operating with “standard” solids, bedinventories, gas velocities and solid circulation rates.

• SO2 capture in the CFB carbonator over 95%.



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More information in www.caoling.eu

http://www.caoling.eu/



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CaOling Project - First experiences on the 1,7MWt calcium ...oxyfbc.eu-projects.de/Portals/29/OxyFBC/11_Biezma... · Pereda Power Plant aiming to validate the technology in the 1MW’s