Experiments on the Kinetics of CO2 Loaded MDEA-DEA Aqueous Solution

2014 ◽  
Vol 955-959 ◽  
pp. 2306-2309
Author(s):  
Shu Bin Zhao ◽  
Pan Zhang ◽  
Xiao Tong Cai ◽  
Dong Fu
Keyword(s):  
Aqueous Solution ◽  
Mass Fraction ◽  
Absorption Rate ◽  
Normal Pressure ◽  
Influence Of Temperature ◽  
Kinetics Of

The absorption rates of CO2 in diethanolamine (DEA) promoted N-methyldiethanolamine (MDEA) aqueous solution were measured at normal pressure with temperatures ranging from 303.15-323.15K. The influence of temperature and the mass fraction of DEA on the absorption rate of CO2 was illustrated.

Water decolorization using UV radiation and hydrogen peroxide: A kinetic study

2001 ◽  
Vol 44 (5) ◽  
pp. 53-60 ◽  
Author(s):  
C.A. Martín ◽  
O.M. Alfano ◽  
A.E. Cassano
Keyword(s):  
Hydrogen Peroxide ◽  
Uv Radiation ◽  
Absorption Rate ◽  
Fulvic Acids ◽  
Photon Absorption ◽  
Contaminant Concentration ◽  
Organic Substances ◽  
Mechanistic Approach ◽  
Natural Contamination ◽  
Kinetics Of

Sometimes, provision of water for domiciliary consumption faces the problem of natural contamination originated by the presence of organic substances such as humic or fulvic acids. Very often, after conventional sanitary treatments this water exhibits a persistent yellowish coloration that affects its use. Moreover, these substances may act as precursors of tri-halomethanes formation during pre-desinfection with chlorine. This paper presents, with a simplified mechanistic approach, the intrinsic reaction kinetics of natural water decolorization employing UV radiation and hydrogen peroxide. The main variables for the model are: contaminant concentration expressed as TOC, hydrogen peroxide concentration and the photon absorption rate.

scholarly journals Quantification of in vivo metabolic kinetics of hyperpolarized pyruvate in rat kidneys using dynamic 13 C MRSI

2011 ◽  
Vol 24 (8) ◽  
pp. 997-1005 ◽  
Author(s):  
Tao Xu ◽  
Dirk Mayer ◽  
Meng Gu ◽  
Yi-Fen Yen ◽  
Sonal Josan ◽  
...  
Keyword(s):  
Metabolic Kinetics ◽  
Kinetics Of ◽  
Rat Kidneys

scholarly journals Modelling Water Absorption in Micronized Lentil Seeds with the Use of Peleg’s Equation

2019 ◽  
Vol 12 (1) ◽  
pp. 261
Author(s):  
Izabela Kuna-Broniowska ◽  
Agata Blicharz-Kania ◽  
Dariusz Andrejko ◽  
Agnieszka Kubik-Komar ◽  
Zbigniew Kobus ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Water Absorption ◽  
Absorption Rate ◽  
Initial Period ◽  
Infrared Emission ◽  
Heating Time ◽  
Infrared Irradiation ◽  
Pre Treatment ◽  
Peleg’S Equation ◽  
Kinetics Of

The aim of the paper was to investigate the effect of infrared pre-treatment on the process of water absorption by lentil seeds. The paper presents the effects of micronization on the process of water absorption by lentil seeds. As a source of infrared emission, 400-W ceramic infrared radiators ECS-1 were used. The seeds were soaked at three temperature values (in the range from 25 to 75 °C) for 8 h, that is, until the equilibrium moisture content was achieved. Peleg’s equation was used to describe the kinetics of water absorption by lentil seeds. The results were compared with those obtained in the process of soaking crude seeds. On the basis of the conducted research, it was found that the infrared pre-treatment contributed to a substantial increase in the water absorption rate in the initial period of soaking lentil seeds (especially at 25 °C). Infrared irradiation can be an effective method for intensification of lentil seed hydration at an ambient temperature. It should be assumed that, in accordance with the principles of sustainable development, shortening the heating time will significantly reduce the energy consumption and cost of processing lentil seeds.

Effect of Potassium Carbonate Additive on CO2 Absorption in Lithium Zirconate Powder

1998 ◽  
Vol 547 ◽  
Author(s):  
T. Ohashi ◽  
K. Nakagawa
Keyword(s):  
Potassium Carbonate ◽  
Room Temperature ◽  
Absorption Rate ◽  
Co2 Absorption ◽  
The Past ◽  
Lithium Zirconate ◽  
Kinetics Of

AbstractLithium zirconate, which reacts with CO2 reversibly at temperatures over 500°C, is expected to find wider application than conventional CO2 absorbents, as the latter can be used only at room temperature. We examined the effect of potassium carbonate, which had usually been added to facilitate the formation of lithium zirconate in the past, on the kinetics of CO2 absorption reaction. The result shows that the CO2 absorption rate of lithium zirconate powder is extremely accelerated by the potassium carbonate additive. We conclude that this acceleration results from the formation of a eutectic carbonate composed of Li2CO3 and K2CO3.

scholarly journals Influence of Apolipoprotein E on the Lipid Profile and Postprandial Triglyceride Levels in Brazilian Postmenopausal Women With Artery Disease

2017 ◽  
Vol 11 ◽  
pp. 117954681773111 ◽  
Author(s):  
Lúcia Helena Bonalume Tácito ◽  
Lilian Nakachima Yamada ◽  
Marcela Augusta de Souza Pinhel ◽  
Juan Carlos Yugar-Toledo ◽  
Dorotéia Rossi Silva Souza
Keyword(s):  
Risk Factors ◽  
Coronary Artery Disease ◽  
Lipid Profile ◽  
Postmenopausal Women ◽  
Density Lipoprotein ◽  
Control Group ◽  
Metabolic Kinetics ◽  
Postprandial Triglyceride ◽  
Artery Disease ◽  
Kinetics Of

This study confirms the association of risk factors for coronary artery disease (CAD) and the apoE polymorphisms, specifically related to the APOE*4 allele, with coronary disease in postmenopausal women. Significantly altered values of the lipid profile were found in patients when compared with controls, independent of the presence of the APOE*4 allele. However, the controls showed higher high-density lipoprotein cholesterol (HDL-C) levels and reduced triglyceride (TG) levels, differing significantly from patients. In this case, the study of subgroups, considering the APOE*3/3 and APOE*3/4 genotypes, suggests that the APOE*4 allele is not implicated in the variations of the lipid profile of patients and determined an increase in the production levels of HDL-C and a reduction in TG highly benefiting the control group compared with APOE*3/3 genotype. The metabolic kinetics of TG, although with the same pattern between groups, and the presence of the APOE*4 allele are suggested to be associated with accelerated clearance compared with APOE*3 allele in non-CAD group.

Metabolic Kinetics of Proteoglycans by Embryonic Chick Sternal Cartilage in Culture

1999 ◽  
Vol 367 (2) ◽  
pp. 225-232 ◽  
Author(s):  
Hongxiang Liu ◽  
James A. Bee ◽  
Peter Lees
Keyword(s):  
Embryonic Chick ◽  
Metabolic Kinetics ◽  
Kinetics Of
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