Ansaldo Ricerche S.p.A. Carbon Dioxide capture

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Nov 24, 2013 (3 years and 7 months ago)

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Ansaldo Ricerche S.p.A.

Carbon Dioxide capture

Berlin, March 2008

Content


Ansaldo Ricerche activity synthesis
on fuel pre
-
treatment for energy
production


CO2 capture schemes and survey on
storage possibilities

Ansaldo Energia Corporate Chart

Ansaldo Ricerche is controlled by Ansaldo Energia, created as a
Corporate R&D Center of Ansaldo Energia group.

Our mission

Within

the

Power

Generation

Area,

Ansaldo

Ricerche

is

aimed

at

product

development

to

satisfy

needs

from

industrial

customers
,

research

centres,

public

research

programs

administration



based

upon

its

know

how

and

experience

in

high
-
tech

technologies

acquired

in

combustion,

electromechanics,

power

electronics

and

system

integration



to create value through the start
-
up of new businesses based upon
its new products

Products development:

Gasification and reforming


Coal and biomass gasifiers for energy
production (700
-
2500 kWe) gas cleaning and
treatment, small
-
size reformers for different
hydrocarbon fuels.

Gasification and Reforming

CO2 capture:



Pre
-
combustion


Post combustion

Gasification and Reforming

Pre
-
combustion CO2 capture from gasification syngas

Power cycle

Gasification

Pellettized
primary fuel

Gas engine

Desulphuration

120
°
C

Heating

Gas

cleaning

Tar storage

W

CO
2

separation

Condenser

Cooling

Heating

Shift conversion

450
°
C

250
°
C

Cooling

Example of Integration

Gasification and Reforming

Fixed bed gasifier

Relevant topics:


Development of fixed gasification technologies for a
wide variety of coals, primary biomass and waste


Main gasification technology data
:


Actual internal diameter


1.3 m


Thermal power



1000
÷

4000 kW


Efficiency



> 85%


Maximum internal diameter

3 m



ARI fixed bed gasifier pilot plant.
Operative thermal power : 3 MW

Gasification and Reforming

Bubbling bed gasifier

Relevant topics:


Development of gasification technologies for fuel
with high plastic content


Gasifiyng agents


air and/or steam




oxygen
enriched,




CO
2
,
any





proportion


Main gasification technology data
:


Actual internal diameter


0.4 m


Thermal power



500 kW


Efficiency



> 70%



ARI fixed bubbling gasifier pilot plant.
Operative thermal power : about 0.5 MW

Gasification and Reforming

Pre
-
combustion CO2 separation from reformate syngas

Schematic view of the system

Relevant topics:


Hydrophilic, MEA sorbent, Hydrophobic,
membrane concept



Low temperature, high efficiency separation


Compactness enhanced


No liquid dragging into the gas phase



Noiseless when compared to scrubbing



Potential CO2 separation at high pressure

Distributor

Hydrophobic membrane

D
P

Gas inlet


Gas outlet

MEA

pressurized
tank

P

P

F

F

Gasification and Reforming

Autothermal oxygen reforming

Relevant topics:


Pure oxygen reforming using a
catalyst resistant to high gradient
temperature


Fast response to load variation


High quality of reformed gas


High thermal overall efficiency (up to
80%)

Autothermal steam reforming demo plant.
Operative electrical equivalent power :
about 30 kW

Gasification and Reforming

Gas treatment

Relevant topics:


High sulphur resistant catalysts

LT shift reactor

Examples of single operations:

High and low temperature water gas shift

Post
-
combustion
CO2

capture processes



Amine based solvents


Carbonate based adsorbents


New materials adsorbents

Amine based solvents


Continuous absorption of
CO2 from combustion
gases based on solvent
capture

Desorption of CO2 from
the solvent utilising
process steam

Carbonate adsorbents


Pilot absorption plant

This kind of plant operates
with two reactors in an
alternated manner; when the
first reactor is saturated the
gas flow is diverted to the
second one and the first is
regenerated. Energy
consumption for
regeneration is lower than
the amount needed by the
liquid sorbents.

New materials solid adsorbents



Existing capture technologies are relatively unsuitable for
wide use. In fact liquid absorbent are energy intensive and
expansive. Current solid adsorbents (carbonate based) suffer
from low adsorption capacities and lack of stability after
extended use.


New materials to be utilised as solid adsorbents are under
rapid development. For example Hyperbranched Aminosilica
seems to be able to capture up to seven time more carbon
dioxide than the conventional solid materials. Also the
thermal stability is great allowing to recycled numerous times.

Survey on CO2 storage possibilities

Storage



Geological storage


Mineral storage

Re
-
use


Enhanced oil recovery


Enhanced coal bed methane


algae

Thank you