Carbon dioxide Capture

1. CO2 absorption along with determination of mass
transfer coefficient in Packed Bed Reactor
GHULAM ISHAQ KHAN INSTITUTE OF ENGINEERING SCIENCES & TECHNOLOGY
Advisor: Dr.Khurram Imran
Co-Advisor: Dr.Shozeb Mehdi
Najla Javed Reg No: 2017360
Faisal Zulfiqar Reg No: 2017112
Essa Ahmad Reg No:2017105
Department of Chemical Engineering

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Introduction: Our project is based on physical absorption of CO2 using different blends of amines (MEA and TEA) and mass transfer
coefficient. Different ways of capturing CO2 are:
- >Physical Absorption(adsorption)
->Membrane separation
->Cryogenic distillation.
-> CO2 capture in fuel cell
Literature review:
Prachi Zawar a,b, Vivek Javalkote a,
Robert Burnap b, Pramod Mahulikar c,
Pravin Puranik
CO2 capture using limestone This study shows CO2 capture (as
bicarbonates) using calcium oxide
photosynthetically fixed into biomass.
Xuezhong He A review of material development in
carbon capture and the application of
membrane-based processes in power
plants and energy-intensive industries
Different membrane materials for CO2
capture were reviewed in terms of their
sustainability. Only three types of gas
separation membranes have been
demonstrated at pilot scale.
Aruna Singh *, Yash Sharma, Yasaswy
Wupardrasta, Karan Desai
Selection of amine combination for CO2
capture in a packed bed scrubber
Blends of tertiary amine; triethanolamine (TEA)
into primary amine; Monoethanolamine (MEA)
used to capture CO2 in packed bed scrubber with
recycle stream were tested. Amine Combination,
dilution water, liquid flow rate, and gas flow rate
were varied to study the behavior of the system.

3. Importance of work/Motivation:
-What motivated us to chose this project:
 CO2 emissions cause Greenhouse Effect:
Increases Global warming
a).Rises water level b).Climate Change
 Acid Rain
Human Health Impacts
-Motivation to specifically choose amines/blends of MEA+TEA for
carbon dioxide absorption:
 MEA gives better absorption rate, has high chemical reactivity with
CO2, safe to handle and cheap.
 Different blends of MEA and TEA :
 a).Reduces issues relating to degradation and operation of the solvent
caused by corrosion.
 b).Reduces the absorber height and ensures a feasible operation
 c).improved thermodynamic efficiency
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4. Present Condition:
• The current state includes the usage of Monoethanolamine(MEA) for capturing carbon dioxide.
• Due to the COVID-19, experimentation was not possible and if the situation does not improve, simulations and modelling
may be considered as a feasible alternative.
Desired Condition:
• Determining the affect of variation in process parameters on the absorption rate and attaining a max. absorption of 78%.
Gap Analysis and Solutions:
• The pandemic has hindered practical work so no real values have been obtained.
• Using simulations and modelling to get on track
• Using the theoretical precautions to increase the absorption capacity and lower corrosiveness.
Objectives:
• Capturing CO2 via physical absorption using amines(on lab-scale) in packed bed reactor.
• Determination of absorption capacity by varying:
• i)_ Concentration ii)_ Flow Rate iii)_ Diameter iv)_ Velocity of liquid
• Simulations and modelling on an industrial scale(using the flowrates 1.5,2.5,3.5 litres/minutes).
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Gap analysis & Clearly defined
objective:

5. Global warming is reaching it peaks. It needs to be stopped.Various techniques are
present for capturing of carbon dioxide.Solvent scrubbing technology is considered to
be the most advanced post-combustion carbon dioxide capturing technology.
• Commercial availability.
• Low cost
• Fast absorption-rate. Absorbing according to the desired needs, the ”Biggest” social
advantage.Therefore, maximum absorption is 78% using this experiment.
• Energy requirement for solvent regeneration can be reduced.
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Commercialisation possibilities & social impact:

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Execution Plan in terms of Gantt Chart:
Expected Outcomes:
- Up to 85% reduction Carbon Dioxide emissions by utilizing amine based absorption.
- Mathematical relation between mass transfer coefficient and varying fluid flow rate (1.5, 2.5 and 3.5
Litres/minute) and channel diameter ( 6 mm and 9 mm).
- The experimentation should allow us to figuratively characterize the absorption capacity of the amines
used.

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References:
1. Y. S. Y. W. K. D. Aruna Singh *, "Selection of amine combination for CO2 capture in a
packed bed scrubber," ScienceDirect, Vellore, 2016.
2. M. C. S. C. L. M. G. F. E. P. a. B. N. Fernando Vega, "Solvents for Carbon Dioxide Capture,"
in Carbon Dioxide Chemistry, Capture and Oil Recovery, intechopen.com, 2017.
3. 1. M. D. G. N. G. a. J. G. José I. Huertas, " CO2 Absorbing Capacity of MEA," Hindawi
Journal of Chemistry, p. 7, 2015.
4. A. l. o. o. Z. V. J. R. B. P. M. P. Puranik, " CO2 capture using limestone for cultivation of the
freshwater microalga Chlorella PAZ and the cyanobacterium Arthrospira sp. VSJ,"
ScienceDirect, 2016.
5. X. He, "A review of material development in the field of carbon capture and the
application of membrane-based processes in power plants and energy-intensive
industries," BMC, no. Energy, Sustainability and Society, 2018.
6. A. S. Y. S. Y. W. K. Desai, "Selection of amine combination for CO2 capture in a packed bed
scrubber," ScienceDirect, vol. 2, pp. Pages S165-S170, 2016.