CO2 Capture by Nickel Hydroxide Interstratified in the Nanolayered Space of a Synthetic Clay Mineral

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Hunvik, Kristoffer W. Bo ^[1] ; Loch, Patrick ^{[2, 3]} ; Cavalcanti, Leide P. ^{[4, 5]} ; Seljelid, Konstanse Kvalem ^[1] ; Roren, Paul Monceyron ^[1] ; Rudic, Svemir ^[5] ; Wallacher, Dirk ^[6] ; Kirch, Alexsandro ^[7] ; Knudsen, Kenneth Dahl ^{[1, 4]} ; Miranda, Caetano Rodrigues ^[7] ; Breu, Josef ^{[2, 3]} ; Bordallo, Heloisa N. ^{[8, 9]} ; Possum, Jon Otto ^[1]

Afiliação do(s) autor(es)

^[1] Norwegian Univ Sci & Technol, Dept Phys, N-7491 Trondheim - Norway

^[2] Univ Bayreuth, Bavarian Polymer Inst, D-95440 Bayreuth - Germany

^[3] Univ Bayreuth, Dept Chem, D-95440 Bayreuth - Germany

^[4] Inst Energy Technol IFE, N-2027 Kjeller - Norway

^[5] STFC Rutherford Appleton Lab, ISIS Neutron & Muon Source, Didcot OX11 0QX, Oxon - England

^[6] Helmholtz Zentrum Berlin Mat & Energie, Dept Sample Environm, D-14109 Berlin - Germany

^[7] Univ Sao Paulo, Inst Fis, Dept Fis Mat & Mecan, BR-05508090 Sao Paulo, SP - Brazil

^[8] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen - Denmark

^[9] European Spallat Source ESS ERIC, SE-22100 Lund - Sweden

• Tipo de documento: Artigo Científico
• Fonte: Journal of Physical Chemistry C; v. 124, n. 48, p. 26222-26231, DEC 3 2020.
• Citações Web of Science: 0

Resumo

Clay minerals can adsorb large amounts of CO2 and are present in anthropogenic storage sites for CO2. Nanoscale functionalization of smectite clay minerals is essential for developing technologies for carbon sequestration based on these materials and for safe-guarding relevant long-term carbon storage sites. We investigate the adsorption mechanisms of CO2 in dried and hydrated synthetic Ni-exchanged fluorohectorite clay-using a combination of powder X-ray diffraction, Raman spectroscopy, and inelastic neutron scattering. Both dried and hydrated Ni-exchanged fluorohectorite show crystalline swelling and spectroscopic changes in response to CO2 exposure. These changes can be attributed to interactions with {[}Ni(OH)(0.)(83)(H2O)(1.)(17)](0.)(1.17+)(37)-interlayer species, and swelling occurs solely in the interlayers where this condensed species is present. The experimental conclusions are supported by density functional theory simulations. This work demonstrates a hitherto overlooked important mechanism, where a hydrogenous species present in the nanospace of a clay mineral creates sorption sites for CO2. (AU)

• Processo FAPESP: 17/02317-2 - Interfaces em materiais: propriedades eletrônicas, magnéticas, estruturais e de transporte
• Beneficiário: Adalberto Fazzio
• Modalidade de apoio: Auxílio à Pesquisa - Temático