Jet boundary determination of underexpanded two-phase carbon dioxidenozzle flow.

Specific gas-liquid interfacial area in flow tubes 70 mm in diameter of the length 725 and 1 450 mm resp. containing various swirl bodies were measured for concurrent upward flow in the ranges of average gas (air) velocities 11 to 35 ms-1 and liquid flow rates 13 to 80 m3 m-2 h-1 using the method of CO2 absorption into NaOH solutions. Two different flow regimes were observed: slug flow swirled annular-mist flow. In the latter case the determination was carried out separately for the film and spray flow components, respectively. The obtained specific areas range between 500 to 20 000 m3 m-2. Correlation parameters are energy dissipation criteria, related to the geometrical reactor volume and to the static liquid volume in the reactor.

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Interphase distribution of 2-furylethylenes

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19851642 ◽

1985 ◽

Vol 50 (8) ◽

pp. 1642-1647 ◽

Cited By ~ 2

Author(s):

Štefan Baláž ◽

Anton Kuchár ◽

Ernest Šturdík ◽

Michal Rosenberg ◽

Ladislav Štibrányi ◽

...

Keyword(s):

Partition Coefficient ◽

Partition Coefficients ◽

Transport Rate ◽

Phase System ◽

Two Phase ◽

Interphase Distribution ◽

Distribution Kinetics ◽

System 1 ◽

Kinetics Of

The distribution kinetics of 35 2-furylethylene derivatives in two-phase system 1-octanol-water was investigated. The transport rate parameters in direction water-1-octanol (l1) and backwards (l2) are partition coefficient P = l1/l2 dependent according to equations l1 = logP - log(βP + 1) + const., l2 = -log(βP + 1) + const., const. = -5.600, β = 0.261. Importance of this finding for assesment of distribution of compounds under investigation in biosystems and also the suitability of the presented method for determination of partition coefficients are discussed.

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Determination of cross-sectional void fraction in a two-phase water flow through a PVC pipe

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/655/1/012024 ◽

2021 ◽

Vol 655 (1) ◽

pp. 012024

Author(s):

O.H. Ajesi ◽

M.B. Latif ◽

S.T. Gbenu ◽

C. A. Onumejor ◽

M. K. Fasasi ◽

...

Keyword(s):

Water Flow ◽

Void Fraction ◽

Two Phase ◽

Cross Sectional ◽

Flow Through ◽

Pvc Pipe ◽

Phase Water

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Chemical sensing failed by aggregation-caused quenching? A case study enables liquid/solid two-phase determination of N2H4

Chemical Engineering Journal ◽

10.1016/j.cej.2021.128975 ◽

2021 ◽

Vol 415 ◽

pp. 128975

Author(s):

Xiangqian Li ◽

Mengqing Li ◽

Yuze Chen ◽

Gongxi Qiao ◽

Qian Liu ◽

...

Keyword(s):

Chemical Sensing ◽

Phase Determination ◽

Two Phase

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Interaction Boundary Determination of Renewable Energy Sources to Estimate System Strength Using the Power Flow Tracing Strategy

Sustainability ◽

10.3390/su13031569 ◽

2021 ◽

Vol 13 (3) ◽

pp. 1569

Author(s):

Namki Choi ◽

Byongjun Lee ◽

Dohyuk Kim ◽

Suchul Nam

Keyword(s):

Renewable Energy ◽

Power Flow ◽

Renewable Energy Sources ◽

Energy Sources ◽

Test Results ◽

Boundary Determination ◽

Actual Interaction ◽

Power Flow Tracing ◽

Estimate System

System strength is an important concept in the integration of renewable energy sources (RESs). However, evaluating system strength is becoming more ambiguous due to the interaction of RESs. This paper proposes a novel scheme to define the actual interaction boundaries of RESs using the power flow tracing strategy. Based on the proposed method, the interaction boundaries of RESs were identified at the southwest side of Korea Electric Power Corporation (KEPCO) systems. The test results show that the proposed approach always provides the identical interaction boundaries of RESs in KEPCO systems, compared to the Electric Reliability Council of Texas (ERCOT) method. The consistent boundaries could be a guideline for power-system planners to assess more accurate system strength, considering the actual interactions of the RESs.

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Potentiometric Surfactant Sensor Based on 1,3-Dihexadecyl-1H-benzo[d]imidazol-3-ium for Anionic Surfactants in Detergents and Household Care Products

Molecules ◽

10.3390/molecules26123627 ◽

2021 ◽

Vol 26 (12) ◽

pp. 3627

Author(s):

Nikola Sakač ◽

Dubravka Madunić-Čačić ◽

Dean Marković ◽

Lucija Hok ◽

Robert Vianello ◽

...

Keyword(s):

Anionic Surfactants ◽

Negative Impact ◽

Ion Pair ◽

Two Phase ◽

Potentiometric Response ◽

Titration Curves ◽

Signal Change ◽

Nernstian Slope ◽

Good Agreement

A 1,3-dihexadecyl-1H-benzo[d]imidazol-3-ium-tetraphenylborate (DHBI-TPB) ion-pair implemented in DHBI-TPB surfactant sensor was used for the potentiometric quantification of anionic surfactants in detergents and commercial household care products. The DHBI-TPB ion-pair was characterized by FTIR spectroscopy and computational analysis which revealed a crucial contribution of the C–H∙∙∙π contacts for the optimal complex formation. The DHBI-TPB sensor potentiometric response showed excellent analytical properties and Nernstian slope for SDS (60.1 mV/decade) with LOD 3.2 × 10−7 M; and DBS (58.4 mV/decade) with LOD 6.1 × 10−7 M was obtained. The sensor possesses exceptional resistance to different organic and inorganic interferences in broad pH (2–10) range. DMIC used as a titrant demonstrated superior analytical performances for potentiometric titrations of SDS, compared to other tested cationic surfactants (DMIC > CTAB > CPC > Hyamine 1622). The combination of DHBI-TPB sensor and DMIC was successfully employed to perform titrations of the highly soluble alkane sulfonate homologues. Nonionic surfactants (increased concentration and number of EO groups) had a negative impact on anionic surfactant titration curves and a signal change. The DHBI-TPB sensor was effectively employed for the determination of technical grade anionic surfactants presenting the recoveries from 99.5 to 101.3%. The sensor was applied on twelve powered samples as well as liquid-gel and handwashing home care detergents containing anionic surfactants. The obtained results showed good agreement compared to the outcomes measured by ISE surfactant sensor and a two-phase titration method. The developed DHBI-TPB surfactant sensor could be used for quality control in industry and has great potential in environmental monitoring.

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