Synthesis of N-[(2-hydroxyethoxy)carbonyl]glycine from carbon dioxide, ethylene oxide, and α-amino acid by ionic gelation of sodium tripolyphosphate (TPP) and spirulina supported on magnetic KCC-1 in aqueous solution

2018 ◽  
Vol 42 (12) ◽  
pp. 10153-10160 ◽  
Author(s):  
Rahele Zhiani ◽  
Mehdi Khoobi ◽  
Seyed Mohsen Sadeghzadeh
Keyword(s):  
Carbon Dioxide ◽  
Aqueous Solution ◽  
Amino Acid ◽  
Ethylene Oxide ◽  
Sodium Tripolyphosphate ◽  
Ionic Gelation

Ionic gelation supported on Fe3O4/KCC-1 has been developed for the synthesis of N-[(2-hydroxyethoxy)carbonyl]glycine from carbon dioxide, ethylene oxide, and α-amino acid.

scholarly journals EFFICIENCY OF THE USE OF SUPERCRITICAL EXTRACTION TECHNOLOGIE IN THE RECOVERY OF ETHYLENE OXIDE

2018 ◽  
Vol 20 (5-6) ◽  
pp. 102-109
Author(s):  
D. D. Akhcmetlatyypova ◽  
F. M. Gumerov ◽  
E. Sh. Telyakov
Keyword(s):  
Carbon Dioxide ◽  
Aqueous Solution ◽  
Energy Consumption ◽  
Ethylene Oxide ◽  
Extraction Process ◽  
Extraction Technology ◽  
Desorption Process ◽  
Traditional Technology ◽  
Extraction Scheme ◽  
Degree Of Extraction

The article considers a model of supercritical СО2 ‒ extraction technology of ethylene oxide emission from its aqueous solution, which is proposed to replace energy consuming desorption process. The possibility of using normal alkanes as modifiers of the main extractant is considered. A comparative analysis of the energy consumption ofsupercritical and traditional technologies is carried out.Methods. The Hysys program was used to model the processes.Results.Was simmulated the extraction process of ethylene oxide separation from its aqueous solution using as an extractant pure and modified with propane, n-butane, n-pentane supercritical carbon dioxide supplemented with further purification and concentration of the desired product.The results indicate the inappropriateness of using n-butane and n-pentane as an additive to carbon dioxide. Comparison of three technological schemes (traditional and two extraction schemes with pure and modified carbon dioxide) shows that the energy consumption for heating the rectification columns is significantly lower in the case of SC-CO2 extraction technologies (115 MW ‒ traditional technology, 36 and 79 MW for SC ‒ CO2 extraction technology without additives and with the addition of propane, respectively), while the combined capacities of pumps and compressors were the least for traditional technology. But, since the degree of extraction of ethylene oxide in the extraction scheme with the addition of propane turned out to be practically equal to unity (0.996), the considered energy indices, referred to the kilogram of the product obtained, turned out to be the best for this scheme.

Absorption/desorption mechanism of carbon dioxide capture into amino acid ionic liquid aqueous solution

2015 ◽  
Vol 45 (7) ◽  
pp. 747-754 ◽  
Author(s):  
Guohua Jing ◽  
Bihong Lv ◽  
Yixuan Liu ◽  
Zuoming Zhou ◽  
Bingsong Guo
Keyword(s):  
Carbon Dioxide ◽  
Aqueous Solution ◽  
Ionic Liquid ◽  
Amino Acid ◽  
Carbon Dioxide Capture ◽  
Desorption Mechanism ◽  
Amino Acid Ionic Liquid

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>

SINTESIS DAN KARAKTERISASI NANOPARTIKEL KITOSAN – EKSTRAK KULIT BUAH MANGGIS (Garcinia Mangostana)

2013 ◽  
Vol 14 (3) ◽  
Author(s):  
Eriawan Rismana ◽  
Susi Kusumaningrum ◽  
Olivia Bunga P ◽  
Idah Rosidah ◽  
Marhamah Marhamah
Keyword(s):  
Particle Size ◽  
Sodium Tripolyphosphate ◽  
Chitosan Solution ◽  
The Other ◽  
Ionic Gelation ◽  
Garcinia Mangostana ◽  
Particle Size Analyzer ◽  
Cadmium Lead ◽  
Solvent Residue ◽  
Mold And Yeast

The chitosan – Garcinia Mangostana extract nanoparticles has been prepared by ionic gelation reaction by mixture 0.2 % chitosan solution in acetic acid with Garcinia Mangostana extract and it’s continued by reaction process with 0.1 % sodium tripolyphosphate. The particle size of material was determined by Particle Size Analyzer (PSA) that it showed in the range of 200 – 500 nm. The color, pH, water, α- mangostin, mercury, arsenic, cadmium, lead, totally microbe aerobic, totally mold and yeast, and solvent residue contents of nanoparticles were also examined by many methods that these resulted are yellow, 4.50 – 5.50, 89 – 90 %, 1.05 %, < 0.005 ppm, < 0.01 ppm, < 0.01 ppm, < 0.05 ppm, < 10 CFU/g, < 10 CFU/g and not detected, respectively. The other characterization was also observed that it’sincluded stability andTLC chromatogram. A mixture of nanoparticles with cosmetics bases was showed that it’s increased stability, homogeneity and easy to formed.

Aqueous solution thickening of amino acid‐based surfactant by alkylpyrrolidone

2021 ◽  
Author(s):  
Xuemin Liu ◽  
Ke Wu ◽  
Weili Song ◽  
Qiuyun Lei ◽  
Hui Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Amino Acid

Photooxidation at Platinum Colloidal TiO2 Aqueous-Solution Interfaces. I. Ethylenediaminetetraacetic Acid and Related-Compounds

1986 ◽  
Vol 39 (5) ◽  
pp. 757 ◽  
Author(s):  
DN Furlong ◽  
D Wells ◽  
WHF Sasse
Keyword(s):  
Carbon Dioxide ◽  
Aqueous Solution ◽  
Ethylenediaminetetraacetic Acid ◽  
Oxidation Potential ◽  
Illumination Time ◽  
Carbonium Ions ◽  
Production Of Hydrogen ◽  
Glycine Derivatives ◽  
Lactic Acids ◽  
Exhaustive Oxidation

The photooxidation of ethylenediaminetetraacetic acid ( edta ) and related glycine derivatives, at Pt/TiO2/aqueous solution interfaces, has been monitored via the production of hydrogen and carbon dioxide. Yields are consistent with the exhaustive oxidation of methoxycarbonyl groups and the rate varied with the number and distribution of such groups. A photooxidation pathway is proposed which involves the oxidation of intermediate carbonium ions. Plausible molecular intermediates, such as formic acid and formaldehyde in the case of edta , have been shown in separate experiments to be photooxidized according to the proposed pathway. The maximum rate of oxidation for each donor depends on its oxidation potential and its tendency to adsorb on TiO2 surfaces. Desorption due to pH increase, as well as consumption of the donor, causes the rate to decline rapidly with illumination time. Acetic and malonic acids gave some hydrogen but underwent mainly (> c. 80%) photo-Kolbe decarboxylation to yield carbon dioxide and methane. By contrast the oxidation of oxomalonic, pyruvic and lactic acids proceeded mainly via a H2 producing pathway similar to that established for edta. The oxidation of pyruvic and lactic acids ceased at a yield of one mole of CO2 per mole of acid.

Cationic poly-L-amino acid-enhanced selective hydrogen production based on formate decomposition with platinum nanoparticles dispersed by polyvinylpyrrolidone

2021 ◽  
Author(s):  
Yusuke Minami ◽  
Yutaka Amao
Keyword(s):  
Aqueous Solution ◽  
Amino Acid ◽  
Hydrogen Production ◽  
Formic Acid ◽  
Platinum Nanoparticles ◽  
Hydrogen Carrier ◽  
Low Toxicity ◽  
Formate Decomposition

Formate is attracting attention as a hydrogen carrier because of its low toxicity and easy handling in aqueous solution. In order to utilize formic acid as a hydrogen carrier, a...

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