Biogas generally contains significant quantities of carbon dioxide in addition to methane. A bubbling column reactor operating
at atmospheric pressure is proposed for cheap separation and a Mettler RC1 reaction calorimeter was used to build a simplified
empirical model for measuring the molar heat of solubility of CO2 in aqueous solutions of monoethanolamine (MEA). Determinations were performed in 12 mass% MEA solutions regenerated at atmospheric
pressure and reflux temperature for 3 h. Flows of CO2 from 174 to 917 mL min−1 were used at a reactor temperature of 283 to 353 K.
Kinetics of mechanically induced CO2 extensive sorption by silicate minerals (labradorite, diopside, okermanite, ghelenite and wollastonite) was considered. Mechanical
activation of the silicates was carried out in a planetary mill in CO2 at atmospheric pressure. Carbon dioxide was consumed by the silicates in the form of carbonate ions and its content in the
samples after 30 min of mechanical treatment reached 3–12 mass% CO2 depending on mineral composition. Equations that reasonably good represent kinetics of CO2 mechanosorption by silicates were proposed. These equations enable to calculate mechanosorption coefficients that characterize
the diffusivity of CO2 into disordered silicate matrix under intensive mechanical impact. Thermal analysis of the mechanically activated silicates
showed that there was positive correlation between temperature of complete carbonate decomposition and mechanosorption coefficient.
The enthalpies of absorption and solubility at T=298.15 K of carbon dioxide in aqueous solutions of bis-(3-dimethylaminopropyl)amine (CAS RN: [6711-48-4]) are reported in
this paper. It was observed that the saturation loading of the CO2 is α=2.9 mol CO2/mol TMBPA, which is close to the theoretical value, α0=3 mol CO2/mol TMBPA. The molar heat of absorption of CO2 is independent of the polyamine concentration of the solutions and the amount of CO2 absorbed and was calculated to be ΔabsHm=–44 (2) kJ mol–1 CO2.
Authors:Eszter Tóth, Györgyi Gelybó, Ilona Kása, and Csilla Farkas
Bajgai, Y. et al., 2011. A laboratory study of soil carbondioxide emissions in a vertisol and an alfisol due to incorporating corn residues and simulating tillage. Journal of Organic Systems. 6 . (3) 20
Authors:Marcela N. Barbosa, Antonio S. Araujo, Luzia P. F. C. Galvão, Edjane F. B. Silva, Anne G. D. Santos, Geraldo E. Luz Jr., and Valter J. Fernandes Jr.
energy use, alternative fuels with lower carbon content, use of biofuels or the capture and storage of CO 2 [ 1 , 2 ]. Carbondioxide can be captured by a variety of techniques, such as amine absorption, membrane separation, cryogenic separation, and
Authors:G. Di Nicola, M. Moglie, R. Stryjek, and G. Santori
The dimethyl ether (DME) + carbondioxide (CO 2 ) mixture can be an attractive option for different applications. In a recent article, the present system was proposed as a solvent [ 1 ], and its solvent properties
Authors:Jeong-In Yu, Hye-Ji Choi, Manickam Selvaraj, and Dae-Won Park
work [ 13 ], the immobilization of ionic liquids onto MCM-41 showed excellent activity for carbondioxide insertion reactions. However, the use of expensive pore-directing agents and large amounts of organic solvents to remove the templates makes these
Authors:Jianfei Ding, Rong Shao, Jun Wu, Zhangfeng Qin, and Jianguo Wang
isobutene yield and poor catalyst stability. The experimental results are still unsatisfactory for practical applications. In our previous work [ 9 ], we found that the coupling dehydrogenation of isobutane in carbondioxide over NiO/AC has better results