Enel's CCS Project

Current Status Overview

Stefano Malloggi

Roma, 18 ottobre 2011

Uso: Aziendale

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ZEPT Post-combustion capture and storage demo project

Project goal

To retrofit one 660 MWe

coal fired unit of Porto Tolle

power station with CO2

capture equipment and

start CO2 underground

storage by the end of 2015

P1 = Site of the Enel’s post-combustion capture pilot plantP2 = Site of the Eni’s injection pilot plant

Site of the CCS demo power plant

P1

P2

Porto Tolle

P1 = Site of the Enel’s post-combustion capture pilot plantP2 = Site of the Eni’s injection pilot plant

Site of the CCS demo power plant

P1

P2

Porto Tolle

Porto Tolle

Uso: Aziendale

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• Flue gas flow rate: 810.000 Nm3/h

• Capacity: 1 Mt of CO2 per year (250 MWe equivalent)

• Capture technology: post combustion ammine based

• CO2 removal efficiency: 90%

• Storage: deep saline aquifer off-shore (about 100 km from the power plant)

• Plant in operation: by the end of 2015

P.To Tolle demo projectMain features of the demo plant

P1 = Site of the Enel’s post-combustion capture pilot plantP2 = Site of the Eni’s injection pilot plant

Site of the CCS demo power plant

P1

P2

Porto Tolle

P1 = Site of the Enel’s post-combustion capture pilot plantP2 = Site of the Eni’s injection pilot plant

Site of the CCS demo power plant

P1

P2

Porto Tolle

Porto Tolle

Uso: Aziendale

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ZEPT Post-combustion capture and storage demo

project

General planning (*)

Phase 1

Phase 2

Phase 3

Phase 4

20122006 2013 201520142007 2008 2010 20112009

Capture process testsat lab scale

Geological storage site characterization and preparation

Feasibility study, design and construction of a CCS demo plant

Operation of the capture pilot plantand pilot tests on transport & injection

Technology follow-up

Design and construction of a10.000 Nm3/h pilot plant

Geological studies for site selection

(*) time schedule subject to be modified in relation to P.to Tolle Power Station authorization procedure

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• Feasibility study of P.to Tolle demo project

• Sorbent characterization• Pilot scale test of MEA sorbent

• Selection of the capture technology • Development of the FEED(*) for transport pipeline and injection infrastructure • Selection and assessment of the storage site• Development of the financing plan

CCS – The main activities in progress

1

2

(*) Front End Engineering Design

Uso: Aziendale

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Selection of the process and conceptual design development

Selection of the potential technology providers by international level survey

Definition of a scoring matrix and selection of the top 4 by a question&answer procedure

Development of 4 FEED and• selection of the BAT for capture and compression section

• Test of the sorbent used by the selected tecnology provider on the 10.000 Nm3/h pilot plant of Brindisi

Selection of the capture technology1

Front End Engineering Design

- Process Flow Diagrams e Process & Instrumentation Diagrams

- Mass & energy balance

- Detailed design of: main components and key items, civil works, electric system and automation

- Materials

- Plant general lay out and lay out of piping

- Quantities and weights

- Planning of engineering and mounting

- Investment cost (construction engineering, R&C system, components, piping, civil works, BOP, mounting, ecc) and O&M cost evaluation (chemicals, ee, water, spare parts, ecc)

P.To Tolle demo project - Feasibility Analysis

CO2 path

Power Unit Capture

CO2

I njection Deep saline aquifer

Compression and transport

Cap rock –impermeable layer

1 km

CO2 path

Power Unit Capture

CO2

I njection Deep saline aquifer

Compression and transport

Cap rock –impermeable layer

1 km

Work flow

Uso: Aziendale

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1

Pre-screening completed. Selected a reservoir with an estimated capacity of 200 Mt of CO2

(*) Activity Flow chart

3. Risk analysis

Activities in progress

Selection and assessment of the storage site

2. Geological site modeling and appraisal well design

4. Appraisal well construction and

injection test

(2013)

1. Data assessment

and base line

(*) able to storage the total CO2 mass rate of the power station for 25 years

Porto TollePower plant

P.To Tolle demo project - Feasibility Analysis

The activities are carried out in collaboration with eni and italian/international scientific institutions (INGV, OGS, CESI, IFP, Schlumberger)

Uso: Aziendale

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Start up and commissioning July 2010

Three experimental campaigns performed:

baseline tests with MEA 20%wt

parametric tests with MEA 30-40% wt

reclaiming tests

emission measures

Numbers:

2500 h of operation

5000 ton of CO2 captured

More than 200 visitors in six months (after

inauguration)

Activities

Flue gas flow: 10.000 Nm3/h Capture capacity: 50-60 t CO2/day Capture efficiency: 85-95% Absorption temperature: 45-50 ºC Desorption pressure: up to 2.5 barg CO2 purity: >99%,vol SO2 at capture section inlet: < 20 mg/Nm3

particulate at capture section inlet: < 0,25 mg/Nm3

CO2 capture pilot plant Highlights

Main features

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Uso: Aziendale

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MEA 20% MEA 30% MEA 40%

Gj/

ton

CO

2

Solvent flow rate - mc

Campaign Gj/ton CO2 %

MEA 20 % 4,1 0

MEA 30 % 3,4 - 17

MEA 40 % 3,02 - 26

~17%~26%

Gj/

ton C

O2

MEA 20% MEA 30% MEA 40%

2 Brindisi pilot plant - MEA test results

MEA 40 % reduction over 25% compared to MEA 20 % and over 15% respect

to MEA 30%

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2 Reduction of the energy impactincreasing the capture process performance

New technology development path

15105 20

Ammine based sorbents (now in Brindisi pilot and in PT demo in the future)

LIQUID SORBENT

Technologies Enel conseders of interest in the short-mid term period

2

4

6

8

10

12

14

Loss o

f effi

cie

ncy (

%)

years

• In the first phase the research activities will be focused on the ammine based sorbents (used in P.to Tolle application)

• In the second phase the objective will be to characterized and select 2nd generation sorbents potentially suitable for improving the capture process performances. The goal is to reduce the energy impact of CCS on the generation unit in the range 40%-50% (for commercial plant built after 2025)

Mid-Long term tecnologies (ex. solid sorbents, membrane, ionic liquid, hydrates)

The different sorbents will be tested on the pilot plant of Brindisi since 2011 with the aim of verifying the energy penalty (mid term objective: reduction of

40%)

New sorbents (dual phase, ammino-acid, new ammine mix, ammonia)

Uso: Aziendale

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Thank you for your kind attention