OALib Journal
  OALib Journal is an all-in-one open access journal (ISSN Print: 2333-9705, ISSN Online: 2333-9721). It accepts a manuscript for the peer-review processing, typesetting, publication and then allocated to one of the 322 subject areas. The article processing charge for publishing in OALib journal is Only $99. For more details, please contact service@oalib.com. Submit now
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Mar 28, 2023Open    Access

Hexagonal WO3 Acetone Gas Sensor Modified by Graphene-COOH Functionalized (GCOOH)

Yuxuan Guo, Haiming Zhang
GCOOH-WO3 composites mixed with different amounts of Graphene-COOH functionalized (GCOOH) (0, 0.05, 0.1 and 0.2 wt%) were prepared by hydrothermal method at 180°C for 10 h and 24 h. The asprepared WO3 and GCOOH-WO3 composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman spectroscopy and other equipment. The effect of the amount of graphene in the composites on the gas-sensing responses and the gas-sensing selecti...
Open Access Library J.   Vol.10, 2023

Mar 28, 2023Open    Access

SnO2 Modified by Quasi-Molecular Imprinting Method Gas Sensor for Formaldehyde

Wenfu Qin, Haiming Zhang
The stannic oxide (SnO2) was modified using Quasi-Molecular imprinting method. The morphology and structure of the modified SnO2 were characterized by X-ray diffraction (XRD), and transmission electron microscopy (SEM). The gas-sensing performance of the modified and unmodified SnO2 sensors was compared, and the mechanism of MIP technique in improving the gas-sensing performance of SnO2 was discussed. The selective test results showed that the improved...
Open Access Library J.   Vol.10, 2023

Dec 06, 2021Open    Access

The Influence of Inorganic Salts on the Phase Diagram and Separating Ability of Aqueous Biphasic System: Peg/Sodium Citrate-Water

Shahbazova M. Gunel, Masimov A. Eldar
The purpose of the proposed research is to ensure that the value of the distinction is adjusted to each application by using various supplements to separate and clean up biological objects. The work presents the results of studies of the phase diagram of the biphasic system composed of polyethylene glycol (PEG)/sodium citrate-water and the effect of inorganic salts (sodium sulfate, sodium carbonate, sodium nitrate, potassium sulfate, potassium chloride, potassium iodide, potassium bromide) on th...
Open Access Library J.   Vol.8, 2021

Feb 20, 2017Open    Access

Comparative Study between Physical Properties of Virgin Oil and Re-Refining Oil

Bestoon M. Faqi-Ahmed, Karzan A. Omar
The lubricating oils are essential for operating engine with high efficiency. Therefore, the physical properties of oil such as flash point, pour point, kinematic viscosity, specific gravity and the American Petroleum Institute are necessary to be studied to indicate good quality of the lubricating oil. In this study, we compare the physical properties of two virgin oils with re-refining oil.
Open Access Library J.   Vol.4, 2017

Sep 13, 2016Open    Access

Predicting the Enthalpy of Vaporization and Calculating the Entropy of Vaporization of 87 Octane Gasoline Using Vapor Pressure

Shawn M. Abernathy, Kelly R. Brown
The vapor pressure (VP) of 87 grade gasoline was measured using an enhanced VP acquisition system over a temperature range of approximately 19.0℃ (292.2 K) and 69.0℃ (342.2 K). The empirical data were used to predict the thermodynamic entities the enthalpy of vaporization (ΔHvap) and the entropy of vaporization (ΔS
Open Access Library J.   Vol.3, 2016

Mar 29, 2016Open    Access

Percolation Transitions of the Ideal Gas and Supercritical Mesophase

Leslie V. Woodcock
High-temperature and pressure boundaries of the liquid and gaseous states have not been defined thermodynamically. Standard liquid-state physics texts use either critical isotherms or isobars as ad hoc boundaries in phase diagrams. Here we report that percolation transition loci can define liquid and gas states, extending from super-critical temperatures or pressures to “ideal gas” states. Using computational methodology described previously we present results for the thermodynamic...
Open Access Library J.   Vol.3, 2016

Sep 28, 2015Open    Access

Using the Vapor Pressure of Pure Volatile Organic Compounds to Predict the Enthalpy of Vaporization and Computing the Entropy of Vaporization

Shawn M. Abernathy, Kelly R. Brown
The objective of this investigation was to develop a vapor pressure (VP) acquisition system and methodology for performing temperature-dependent VP measurements and predicting the enthalpy of vaporization (ΔHvap) of volatile organic compounds, i.e. VOCs. High quality VP data were acquired for acetone, ethanol, and toluene. VP data were also obtained for water, which served as the system calibration standard. The empirical VP data were in excellent agreement with its refe...
Open Access Library J.   Vol.2, 2015

Apr 30, 2015Open    Access

Gaskets with Expandable Graphite Treated with Nitric, Sulphuric, Phosphoric Acids and Ferric Chloride

Heinrich Horacek
The task was to find out the most appropriate expandable graphite intercalation compound GIC for intumescent seals. The application in fire seals required GICs, which exerted high expansion at low burning rates. Therefore graphite was treated with nitric, sulphuric, phosphoric acids and ferric chloride. Phosphoric acid with its flame retardant properties was the favourite, but graphite treated with it, did not exfoliate, therefore expandable graphite was post treated with phosphoric acid. Elemen...
Open Access Library J.   Vol.2, 2015

Sep 10, 2014Open    Access

Thermal Analysis of Combustion Engine in Accordance to Temperature at the Outside Surfaces of the Engine

Zbigniew J. Sroka
The internal combustion engine needs to be assessed in terms of thermal loads that come from different sources. Thermal analysis is important in both the design and the evaluation of the conditions of the engine. Interesting good results are obtained by association studies using non-invasive methods such as Infrared and mathematical modelling based on the boundary conditions identified in the experiment. The paper presents a methodology for measuring the surface temperature fields outside of the...
Open Access Library J.   Vol.1, 2014

Aug 12, 2014Open    Access

Kinetics of Direct Reduction Titanomagnetite Briquette Produced from Rossetta-Ilmenite via Hydrogen

Naglaa Ahmed El-Hussiny, Atef El-Amir, Saied Thabet Abdel-Rahim, Khaled El hossiny, Mohamed El-Menshawi Hussein Shalabi

Reduction kinetics of titanomagnetite concentrate briquettes produced from Rossetta-llmenite ore via 1.5 liter/min hydrogen flow rate were investigated at different temperatures ranging from 600℃ to 950℃. It was found that the best reduction properties were found at 950℃, so the kinetic models shown by the briquettes at this temperature maybe: Diffusion control or Diffusion through ash layer (crank-cins

Open Access Library J.   Vol.1, 2014


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