scholarly journals Identification and properties of reactive sites in protein capable of binding carbon dioxide in a gas-solid phase system.

1977 ◽  
Vol 23 (2) ◽  
pp. 145-152 ◽  
Author(s):  
Hisateru MITSUDA ◽  
Fumio KAWAI ◽  
Aijiro YAMAMOTO ◽  
Fumiaki SUZUKI ◽  
Kenji NAKAJIMA ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Solid Phase ◽  
Phase System

Carbon Dioxide Solid-Phase Embedding Reaction of Silicon-Carbon Nanoporous Composites for Lithium-Ion Batteries

2021 ◽  
pp. 130127
Author(s):  
Zhiwei Yang ◽  
Lang Qiu ◽  
Mengke Zhang ◽  
Yanjun Zhong ◽  
Benhe Zhong ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Lithium Ion Batteries ◽  
Solid Phase ◽  
Lithium Ion ◽  
Silicon Carbon

Influence of biomass on hydrodynamics of an internal loop airlift reactor

2006 ◽  
Vol 60 (6) ◽  
Author(s):  
M. Juraščík ◽  
M. Hucík ◽  
I. Sikula ◽  
J. Annus ◽  
J. Markoš
Keyword(s):  
Aspergillus Niger ◽  
Gluconic Acid ◽  
Solid Phase ◽  
Biomass Concentration ◽  
Airlift Reactor ◽  
Phase System ◽  
Two Phase ◽  
Experimental Conditions ◽  
Internal Loop ◽  
Three Phase

AbstractThe effect of the biomass presence on the overall circulation velocity, the linear velocities both in the riser and the downcomer and the overall gas hold-up was studied in a three-phase internal loop airlift reactor (ILALR). The measured data were compared with those obtained using a two-phase system (air—water). All experiments were carried out in a 40 dm3 ILALR at six different biomass concentrations (ranging from 0 g dm−3 to 7.5 g dm−3), at a temperature of 30°C, under atmospheric pressure. Air and water were used as the gas and liquid model media, respectively. Pellets of Aspergillus niger produced during the fermentation of glucose to gluconic acid in the ILALR were considered solid phase. In addition, liquid velocities were measured during the fermentation of glucose to gluconic acid using Aspergillus niger. All measurements were performed in a bubble circulation regime. At given experimental conditions the effect of the biomass on the circulation velocities in the ILALR was negligible. However, increasing of the biomass concentration led to lower values of the total gas hold-up.

Solid-phase incorporation of gaseous carbon dioxide into oxirane-containing copolymers

2004 ◽  
Vol 42 (15) ◽  
pp. 3812-3817 ◽  
Author(s):  
Bungo Ochiai ◽  
Tokinori Iwamoto ◽  
Toyoharu Miyagawa ◽  
Daisuke Nagai ◽  
Takeshi Endo
Keyword(s):  
Carbon Dioxide ◽  
Solid Phase ◽  
Gaseous Carbon Dioxide

scholarly journals Viscosity measurement of polypropylene loaded with blowing agents (propane and carbon dioxide) by a novel inline method

2019 ◽  
Vol 56 (1) ◽  
pp. 73-88
Author(s):  
Raphael Vincent ◽  
Martin Langlotz ◽  
Matthias Düngen
Keyword(s):  
Carbon Dioxide ◽  
Single Phase ◽  
Polymer Melt ◽  
Viscosity Measurement ◽  
Viscosity Reduction ◽  
Phase System ◽  
Melt Temperature ◽  
Blowing Agents ◽  
Foam Extrusion ◽  
Blowing Agent

Decreased viscosity due to the influence of blowing agent in thermoplastic polymer melts is a key issue for understanding the process of foam extrusion. In a process for direct foam extrusion, a novel approach for inline viscosity measurement of single-phase systems in single screw extruders is used to experimentally evaluate a viscosity decrease. Two blowing agents (propane and carbon dioxide) are tested for their effect on the viscosity of a polypropylene melt. While mass fractions of blowing agent below [Formula: see text] show little to no effect in regard to viscosity reduction compared to a pure polymer melt, a mass fraction of [Formula: see text] already results in significantly decreased viscosity values. While melt temperature influences the viscosity of the polymer melt, measurements show no significant additional effect in regard to a lowered viscosity of a single-phase system of polymer and fully dissolved blowing agent.

Influence of Compressed Carbon Dioxide on the Oxidation of Cyclohexane with Hydrogen Peroxide in Acetic Acid

2006 ◽  
Vol 59 (3) ◽  
pp. 225 ◽  
Author(s):  
Liang Gao ◽  
Tao Jiang ◽  
Buxing Han ◽  
Baoning Zong ◽  
Xiaoxin Zhang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Binary System ◽  
Reaction System ◽  
Phase Region ◽  
Phase Behaviour ◽  
Phase System ◽  
Two Phase ◽  
Three Phase

The oxidation of cyclohexane with H2O2 in a compressed CO2/acetic acid binary system was studied at 60.0 and 80.0°C, at pressures up to 18 MPa, and with the zeolite TS-1 as catalyst. The phase behaviour of the reaction system was also observed. There are three fluid phases in the reaction system at lower pressure but two at higher pressures. In the three-phase region the yields of the products, cyclohexanol and cyclohexanone, increase considerably with increasing pressure and reaches a maximum near the phase-separating pressure. CO2 can thus enhance the reaction effectively. However, the effect of pressure on the yield is very limited after the transition to a two-phase system.

scholarly journals Effect of low oxygen and high carbon dioxide atmospheres on the formation of volatiles during storage of two sweet cherry cultivars

2012 ◽  
Vol 39 (No. 4) ◽  
pp. 172-180 ◽  
Author(s):  
J. Goliáš ◽  
J. Létal ◽  
O. Veselý
Keyword(s):  
Carbon Dioxide ◽  
Sweet Cherry ◽  
Solid Phase ◽  
Storage Period ◽  
Total Volatile ◽  
Low Oxygen ◽  
Phenethyl Alcohol ◽  
Hexenyl Acetate ◽  
Sweet Cherry Cultivars ◽  
Volatile Production

The aroma profiles of two sweet cherry cultivars Kordia and Vanda were investigated during storage at different oxygen and carbon dioxide levels and at a low temperature using solid phase microextraction gas chromatography combined with mass spectrometry (SPME-GC-MS). The most abundant aroma volatiles observed in both sweet cherry cultivars were alcohols, esters, terpenoids and aldehydes. Fifteen alcohols (but principally ethan-1-ol, (E)-2-hexen-1-ol and phenethyl alcohol) provided approximately 39% of the total volatile production and eight esters (principally (E)-2-hexenyl acetate and pentyl butyrate) were responsible for another 39% of the volatile production. Four terpenoids (principally limonene and α-linalool) were responsible for a further 15% of volatile production, and 10 aldehydes (principally (E)-2-hexenal and (E)-2-octen-1-al) were responsible for the remaining 7% of total volatile production. However, out of all the volatile compounds detected, a total of just 6 compounds (phenethyl alcohol, (E)-2-hexenal, (E)-2-octen-1-al, pentyl butyrate, (E)-2-hexenyl acetate and limonene) made up 80% of the total volatile production. Fruit stems remained green during all 54 days of the storage period, although one tenth of the stems slowly dessicated in each of the three controlled atmospheres. This is in marked contrast to the stems of fruit held in a regular atmosphere, which turned completely brown.  

scholarly journals Application of Hollow Fibre-Liquid Phase Microextraction Technique for Isolation and Pre-Concentration of Pharmaceuticals in Water

Membranes ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 311
Author(s):  
Lawrence Mzukisi Madikizela ◽  
Vusumzi Emmanuel Pakade ◽  
Somandla Ncube ◽  
Hlanganani Tutu ◽  
Luke Chimuka
Keyword(s):  
Liquid Phase ◽  
Solid Phase ◽  
Deep Eutectic Solvents ◽  
Enrichment Factors ◽  
Hollow Fibre ◽  
Phase System ◽  
Phase Extraction ◽  
Liquid Phase Microextraction ◽  
Three Phase ◽  
Set Up

In this article, a comprehensive review of applications of the hollow fibre-liquid phase microextraction (HF-LPME) for the isolation and pre-concentration of pharmaceuticals in water samples is presented. HF-LPME is simple, affordable, selective, and sensitive with high enrichment factors of up to 27,000-fold reported for pharmaceutical analysis. Both configurations (two- and three-phase extraction systems) of HF-LPME have been applied in the extraction of pharmaceuticals from water, with the three-phase system being more prominent. When compared to most common sample preparation techniques such as solid phase extraction, HF-LPME is a greener analytical chemistry process due to reduced solvent consumption, miniaturization, and the ability to automate. However, the automation comes at an added cost related to instrumental set-up, but a reduced cost is associated with lower reagent consumption as well as shortened overall workload and time. Currently, many researchers are investigating ionic liquids and deep eutectic solvents as environmentally friendly chemicals that could lead to full classification of HF-LPME as a green analytical procedure.

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