scholarly journals Recovery of Calcium from Waste Concrete and Fixation of Carbon Dioxide Gas by Carbonation Reaction

1998 ◽  
Vol 106 (1235) ◽  
pp. 719-723 ◽  
Author(s):  
Kanichi KAMIYA ◽  
Mamoru TOHMOTO ◽  
Makoto YADA ◽  
Hiroyuki NASU
Keyword(s):  
Carbon Dioxide ◽  
Carbonation Reaction ◽  
Carbon Dioxide Gas ◽  
Waste Concrete ◽  
Fixation Of Carbon Dioxide

Pore Structural Changes and Carbonated Depth of Carbonated Steel Slag

2011 ◽  
Vol 306-307 ◽  
pp. 1122-1125 ◽  
Author(s):  
Hao Ze Wu ◽  
Jun Chang ◽  
Hua Wang
Keyword(s):  
Carbon Dioxide ◽  
Structural Changes ◽  
Raw Materials ◽  
Steel Slag ◽  
Crystal Layer ◽  
Carbonation Reaction ◽  
Carbon Dioxide Gas ◽  
Granular Crystals ◽  
Before And After ◽  
Granular Crystal

Steel slag and carbon dioxide were used as raw materials to prepare building material by carbonation. Effects of forming pressure on carbonation of steel slag and carbonated depth were studied by pore structural changes before and after carbonation and carbonated region. The results showed that these were visible pore structural changes between non-carbonated and carbonated steel slag, and after carbonation, the porosity of steel slag samples were decreased, the number of fine pore was increased and large pore was opposite. Carbon dioxide gas which was sequestrated by Ca(OH)2 and C3S were combined in CaCO3 crystal, and this process was form surface to interior. Clustered granular crystals were generated in the surface and 12 mm depth of samples, while none in the 20 mm depth of samples, no obvious granular crystal growth. The granular crystals which produced by carbonation filled the pores of the sample, in particular the arrangement of dense granular surface of crystal layer, which may impede the spread of CO2 gas to the depths, and carbonation reaction focused on the surface to 12 mm depth region.

Atom Condensed Fukui Function for Condensed Phases and Biological Systems and Its Application to Enzymatic Fixation of Carbon Dioxide

2019 ◽  
Author(s):  
Javier Oller ◽  
David A. Sáez ◽  
Esteban Vöhringer-Martinez
Keyword(s):  
Carbon Dioxide ◽  
Aqueous Solution ◽  
Molecular System ◽  
Chemical Reactivity ◽  
Nucleophilic Attack ◽  
Stable Conformation ◽  
Fukui Functions ◽  
Reactivity Descriptors ◽  
Dynamics Simulations ◽  
Fixation Of Carbon Dioxide

<div><div><div><p>Local reactivity descriptors such as atom condensed Fukui functions are promising computational tools to study chemical reactivity at specific sites within a molecule. Their applications have been mainly focused on isolated molecules in their most stable conformation without considering the effects of the surroundings. Here, we propose to combine QM/MM Born-Oppenheimer molecular dynamics simulations to obtain the microstates (configurations) of a molecular system using different representations of the molecular environment and calculate Boltzmann weighted atom condensed local reac- tivity descriptors based on conceptual DFT. Our approach takes the conformational fluctuations of the molecular system and the polarization of its electron density by the environment into account allowing us to analyze the effect of changes in the molecular environment on reactivity. In this contribution, we apply the method mentioned above to the catalytic fixation of carbon dioxide by crotonyl-CoA carboxylase/reductase and study if the enzyme alters the reactivity of its substrate compared to an aqueous solution. Our main result is that the protein en- vironment activates the substrate by the elimination of solute-solvent hydrogen bonds from aqueous solution in the two elementary steps of the reaction mechanism: the nucleophilic attack of a hydride anion from NADPH on the α, β unsaturated thioester and the electrophilic attack of carbon dioxide on the formed enolate species.</p></div></div></div>

Enhancement of desorption amount of carbon dioxide gas from monoethanolamine solution using ultrasound and calcium chloride

2020 ◽  
Vol 59 (SK) ◽  
pp. SKKD08
Author(s):  
Yuya Kitamura ◽  
Hirokazu Okawa ◽  
Takahiro Kato ◽  
Katsuyasu Sugawara
Keyword(s):  
Carbon Dioxide ◽  
Calcium Chloride ◽  
Carbon Dioxide Gas

STRATIGRAPHIC, SPATIAL, AND STRUCTURAL STYLE OF NATURAL CARBON DIOXIDE GAS ACCUMULATIONS IN THE GREATER PERMIAN BASIN

2016 ◽  
Author(s):  
Ernie R. Slucher ◽  
◽  
Peter D. Warwick ◽  
Christina A. DeVera ◽  
Celeste D. Lohr ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Permian Basin ◽  
Carbon Dioxide Gas ◽  
Structural Style ◽  
Natural Carbon

scholarly journals MECHANISM OF FIXATION OF CARBON DIOXIDE IN THE KREBS CYCLE

1941 ◽  
Vol 139 (1) ◽  
pp. 483-484
Author(s):  
H.G. Wood ◽  
C.H. Werkman ◽  
Allan Hemingway ◽  
A.O. Nier
Keyword(s):  
Carbon Dioxide ◽  
Krebs Cycle ◽  
Fixation Of Carbon Dioxide
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