Dolomite-based Sorbents for High Temperature Carbon dioxide capture.
The impact of doping with inert oxides on the long term performance of dolomite-based sorbents for high temperature CO_2 has been investigated in this work. Arctic dolomite was doped with with various oxides Al2O3, ZrO_2, MgO, CaAl2O4 and effect of the amount of oxide were studied. The unmodified an...
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2457798 2023-05-15T14:57:49+02:00 Dolomite-based Sorbents for High Temperature Carbon dioxide capture. Mawanga, Moses Chen, De Ranjan Rout, Kumar 2017 http://hdl.handle.net/11250/2457798 eng eng NTNU ntnudaim:16054 http://hdl.handle.net/11250/2457798 Chemical Engineering Master thesis 2017 ftntnutrondheimi 2019-09-17T06:52:53Z The impact of doping with inert oxides on the long term performance of dolomite-based sorbents for high temperature CO_2 has been investigated in this work. Arctic dolomite was doped with with various oxides Al2O3, ZrO_2, MgO, CaAl2O4 and effect of the amount of oxide were studied. The unmodified and doped dolomite were subjected to multi cyclic operation with dry conditions in a thermo gravimetric reactor. Experimental results demonstrated that the mixed dopants comprising 3.5\%Al (5.5\% Al2O3) and 2\%Zr (1.96\% ZrO2) satisfactorily improved the stability of Arctic dolomite during 120 cycles where as a single oxide dopant only marginally improved the stability of the dolomite. The morphology, thermal gravimetric data, phase composition, Nitrogen adsorption all showed that dolomite when subjected to dry conditions is stable when doped with this mixed oxide. Up to 120 cycles of carbonation/desorption were carried out in thermo-gravimetric Analyser. There seemed to exist some kind of synergistic effect caused by the mixed dopants towards improving the stability of dolomite. \ce{N2} adsorption analyses revealed that the best case sorbent had a very small surface area of only 5.4 m2/g with the pore size distribution increase significantly. By optimizing the pore size distribution upon cyclic explicates the enhanced stability. Master Thesis Arctic NTNU Open Archive (Norwegian University of Science and Technology) Arctic |
institution |
Open Polar |
collection |
NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
topic |
Chemical Engineering |
spellingShingle |
Chemical Engineering Mawanga, Moses Dolomite-based Sorbents for High Temperature Carbon dioxide capture. |
topic_facet |
Chemical Engineering |
description |
The impact of doping with inert oxides on the long term performance of dolomite-based sorbents for high temperature CO_2 has been investigated in this work. Arctic dolomite was doped with with various oxides Al2O3, ZrO_2, MgO, CaAl2O4 and effect of the amount of oxide were studied. The unmodified and doped dolomite were subjected to multi cyclic operation with dry conditions in a thermo gravimetric reactor. Experimental results demonstrated that the mixed dopants comprising 3.5\%Al (5.5\% Al2O3) and 2\%Zr (1.96\% ZrO2) satisfactorily improved the stability of Arctic dolomite during 120 cycles where as a single oxide dopant only marginally improved the stability of the dolomite. The morphology, thermal gravimetric data, phase composition, Nitrogen adsorption all showed that dolomite when subjected to dry conditions is stable when doped with this mixed oxide. Up to 120 cycles of carbonation/desorption were carried out in thermo-gravimetric Analyser. There seemed to exist some kind of synergistic effect caused by the mixed dopants towards improving the stability of dolomite. \ce{N2} adsorption analyses revealed that the best case sorbent had a very small surface area of only 5.4 m2/g with the pore size distribution increase significantly. By optimizing the pore size distribution upon cyclic explicates the enhanced stability. |
author2 |
Chen, De Ranjan Rout, Kumar |
format |
Master Thesis |
author |
Mawanga, Moses |
author_facet |
Mawanga, Moses |
author_sort |
Mawanga, Moses |
title |
Dolomite-based Sorbents for High Temperature Carbon dioxide capture. |
title_short |
Dolomite-based Sorbents for High Temperature Carbon dioxide capture. |
title_full |
Dolomite-based Sorbents for High Temperature Carbon dioxide capture. |
title_fullStr |
Dolomite-based Sorbents for High Temperature Carbon dioxide capture. |
title_full_unstemmed |
Dolomite-based Sorbents for High Temperature Carbon dioxide capture. |
title_sort |
dolomite-based sorbents for high temperature carbon dioxide capture. |
publisher |
NTNU |
publishDate |
2017 |
url |
http://hdl.handle.net/11250/2457798 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
ntnudaim:16054 http://hdl.handle.net/11250/2457798 |
_version_ |
1766329925222006784 |