Limestone powder CO₂ scrubber – artificial limestone weathering for reduction of flue gas CO₂ emissions

1 Solution weathering of limestone

2 Lime/carbonic acid equilibrium

3 Schematic view of the laboratory test apparatus

4 Influence of temperature and scrubbing
suspension

5 Influence of ion concentration on reaction
rate at 10 °C

6 Influence of sample concentration for various samples and temperatures

7 Increase in removal efficiency at 20 °C when
CO₂ concentration in the flue gas is increased

8 Influence of gas content on reaction rate

9 Diagram of the pilotscale plant

10 Comparison of the conductivities of the
scrubbing solutions used in the laboratory
experiments and the pilot-plant tests

11 CO₂ absorption of scrubbing solutions in
tests performed with closed gas and open
scrubbing-fluid circuits (evaluation of the third
sample downstream of the final absorber in each case)

12 CO₂absorption of the scrubbing fluid
downstream the first, second or final absorption
stage in Test 9 using lime-based scrubbing fluid and a CO₂ concentration of 15 %vol. in the flue gas

13 Removal rates achieved in practical tests using salt-doped mains water

Table 1 Analytical data for the scrubbing water in the
practical tests

Table 2 Comparative assessment of MEA
scrubbing against the limestone-CO₂ scrubbing
process

Slowing down climate change is one of the most important challenges of our age. Exceptional importance attaches in this context to reducing greenhouse-gas emissions, and those of carbon dioxide (CO₂), in particular. Artificial limestone weathering opens up new perspectives in the reduction of CO₂ emissions.

1 Introduction

Various technologies for the removal of CO₂ from the flue gas produced in combustion processes have been researched and tested in trial and pilot facilities in the past already. All of these “post-combustion” processes have in common the fact that they generally utilise...

TEXT Dr. Sonja Haas, Norbert Weber, German Lime and Mortar Research Foundation, Cologne, Andrew Berry, Egon Erich, IUTA – Institute of Energy and Environmental Technology, Duisburg

Issue 11/2019 RESEARCH INSTITUTE LIME AND MORTAR | IUTA E.V.| ICBM

Carbonate CO2 scrubbing process II (ECO2) – Practical experience and technical optimisation

The flue gas scrubbing was researched as part of the AiF IGF research project (IGF No. 18560 N, [1]). The project includes the optimisation of CO2 removal from the flue gas with simultaneous formation...

Issue 12/2014 OTTO-VON-GUERICKE-UNIVERSITÄT MAGDEBURG/GERMANY

Energy consumption and CO2 content in the flue gas of normal shaft kilns: Part 2: Influence of the limestone quality and the process parameters

1 Influence of the CO concentration in the flue gas The lime shaft kiln is used in the lime industry in order to produce so-called medium to hard-burnt lime. This type of kiln is also used in the...

Issue 11/2014 OTTO-VON-GUERICKE UNIVERSITY MAGDEBURG/GERMANY

Energy consumption and CO2 content in the flue gas of normal shaft kilns | Part 1: Influence of the air excess number

1 Introduction The so-called multi-fuel-fired normal shaft kiln (NSK) is one of the oldest types of lime shaft kiln, in which burnt lime is produced from limestone by expelling the carbon dioxide...

Issue 06-07/2009

Ecological comparison between hydrated lime and sodium bicarbonate when used for dry flue gas purification

Lime plays an important role in environmental protection. Not only due to its properties but also due to its natural occurrence, it is suitable and accepted for universal application in the...

Limestone powder CO₂ scrubber – artificial limestone weathering for reduction of flue gas CO₂ emissions

Related articles:

Carbonate CO2 scrubbing process II (ECO2) – Practical experience and technical optimisation

Energy consumption and CO2 content in the flue gas of normal shaft kilns: Part 2: Influence of the limestone quality and the process parameters

Energy consumption and CO2 content in the flue gas of normal shaft kilns | Part 1: Influence of the air excess number

Ecological comparison between hydrated lime and sodium bicarbonate when used for dry flue gas purification

Method for capturing storaging and using carbon dioxide in waste gas of cement production comprising the using of waste heat of cement calcination process

ZKG /

ZKG /

Related articles:

Carbonate CO2 scrubbing process II (ECO2) – Practical experience and technical optimisation

Energy consumption and CO2 content in the flue gas of normal shaft kilns: Part 2: Influence of the limestone quality and the process parameters

Energy consumption and CO2 content in the flue gas of normal shaft kilns | Part 1: Influence of the air excess number

Ecological comparison between hydrated lime and sodium bicarbonate when used for dry flue gas purification

Method for capturing storaging and using carbon dioxide in waste gas of cement production comprising the using of waste heat of cement calcination process