A study on high temperature CO2 capture by improved hydrotalcite sorbents

Aamir Hanif; Soumen Dasgupta; Swapnil Divekar; Aarti Arya; Madhukar O. Garg; Anshu Nanoti

doi:10.1016/j.cej.2013.09.076

A study on high temperature CO₂ capture by improved hydrotalcite sorbents

Aamir Hanif, Soumen Dasgupta, Swapnil Divekar, Aarti Arya, Madhukar O. Garg, Anshu Nanoti^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

90 Scopus citations

Abstract

The effect of synthetic routes in improving the CO₂ capacity of hydrotalcite based sorbents in the temperature range 300-400°C has been studied. Ultrasonication and microwave irradiation of the synthesis gel during hydrotalcite precipitation leads to disruption in the layer stacking which in turn increases surface area. A correlation was observed between the increased surface area and improved equilibrium and dynamic CO₂ capacity. A temperature dependent promotional effect of K₂CO₃ on CO₂ capacity improvement was also observed. The CO₂ loaded hydrotalcites were found to be regenerable by inert purge with or without evacuation at a slightly elevated temperature of ~450°C. The dynamic CO₂ capacity was found to remain stable under cyclic adsorption regeneration conditions.

Original language	English
Pages (from-to)	91-99
Number of pages	9
Journal	Chemical Engineering Journal
Volume	236
DOIs	https://doi.org/10.1016/j.cej.2013.09.076
State	Published - 15 Jan 2014
Externally published	Yes

Bibliographical note

Funding Information:
The authors thankfully acknowledge CSIR-India for the financial support through the project entitled “Development of Clean Coal Technology (NWP21)” and UGC-India for the grant of a research fellowship to Aamir Hanif. The authors are also thankful to Mr. Sandeep Saran and Mr. L.N. Sivkumar Konthala for XRD, SEM data. The help of Mr. Sanjay Kumar during experimental setup is also acknowledged.

Keywords

Dynamic capacity
Equilibrium uptake
High temperature CO capture
Hydrotalcite
Regenerability
Synthesis

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.cej.2013.09.076

Cite this

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title = "A study on high temperature CO2 capture by improved hydrotalcite sorbents",

abstract = "The effect of synthetic routes in improving the CO2 capacity of hydrotalcite based sorbents in the temperature range 300-400°C has been studied. Ultrasonication and microwave irradiation of the synthesis gel during hydrotalcite precipitation leads to disruption in the layer stacking which in turn increases surface area. A correlation was observed between the increased surface area and improved equilibrium and dynamic CO2 capacity. A temperature dependent promotional effect of K2CO3 on CO2 capacity improvement was also observed. The CO2 loaded hydrotalcites were found to be regenerable by inert purge with or without evacuation at a slightly elevated temperature of \textasciitilde{}450°C. The dynamic CO2 capacity was found to remain stable under cyclic adsorption regeneration conditions.",

keywords = "Dynamic capacity, Equilibrium uptake, High temperature CO capture, Hydrotalcite, Regenerability, Synthesis",

author = "Aamir Hanif and Soumen Dasgupta and Swapnil Divekar and Aarti Arya and Garg, \{Madhukar O.\} and Anshu Nanoti",

note = "Funding Information: The authors thankfully acknowledge CSIR-India for the financial support through the project entitled “Development of Clean Coal Technology (NWP21)” and UGC-India for the grant of a research fellowship to Aamir Hanif. The authors are also thankful to Mr. Sandeep Saran and Mr. L.N. Sivkumar Konthala for XRD, SEM data. The help of Mr. Sanjay Kumar during experimental setup is also acknowledged.",

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doi = "10.1016/j.cej.2013.09.076",

language = "English",

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AU - Hanif, Aamir

AU - Dasgupta, Soumen

AU - Divekar, Swapnil

AU - Arya, Aarti

AU - Garg, Madhukar O.

AU - Nanoti, Anshu

N1 - Funding Information: The authors thankfully acknowledge CSIR-India for the financial support through the project entitled “Development of Clean Coal Technology (NWP21)” and UGC-India for the grant of a research fellowship to Aamir Hanif. The authors are also thankful to Mr. Sandeep Saran and Mr. L.N. Sivkumar Konthala for XRD, SEM data. The help of Mr. Sanjay Kumar during experimental setup is also acknowledged.

PY - 2014/1/15

Y1 - 2014/1/15

N2 - The effect of synthetic routes in improving the CO2 capacity of hydrotalcite based sorbents in the temperature range 300-400°C has been studied. Ultrasonication and microwave irradiation of the synthesis gel during hydrotalcite precipitation leads to disruption in the layer stacking which in turn increases surface area. A correlation was observed between the increased surface area and improved equilibrium and dynamic CO2 capacity. A temperature dependent promotional effect of K2CO3 on CO2 capacity improvement was also observed. The CO2 loaded hydrotalcites were found to be regenerable by inert purge with or without evacuation at a slightly elevated temperature of ~450°C. The dynamic CO2 capacity was found to remain stable under cyclic adsorption regeneration conditions.

AB - The effect of synthetic routes in improving the CO2 capacity of hydrotalcite based sorbents in the temperature range 300-400°C has been studied. Ultrasonication and microwave irradiation of the synthesis gel during hydrotalcite precipitation leads to disruption in the layer stacking which in turn increases surface area. A correlation was observed between the increased surface area and improved equilibrium and dynamic CO2 capacity. A temperature dependent promotional effect of K2CO3 on CO2 capacity improvement was also observed. The CO2 loaded hydrotalcites were found to be regenerable by inert purge with or without evacuation at a slightly elevated temperature of ~450°C. The dynamic CO2 capacity was found to remain stable under cyclic adsorption regeneration conditions.

KW - Dynamic capacity

KW - Equilibrium uptake

KW - High temperature CO capture

KW - Hydrotalcite

KW - Regenerability

KW - Synthesis

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