Authors:Farhad Gharagheizi, Mohammad Hossein Keshavarz, and Mehdi Sattari
Flammability characteristics of substance are required in most scientific and engineering branches [ 1 – 18 ]. Flashpoint (FP) is the best known and most widely used flammability property for evaluation of
Flash point of a chemical characterizes its operating safety envelope. Tri-isoamyl phosphate (TiAP) is being proposed as an
alternate to conventional nuclear solvent tri-n-butyl phosphate but flash point of TiAP containing organic solutions are not available in literature. Flash points of C8–C16n-alkanes and 36% TiAP/C8–C16n-alkane solutions were experimentally measured and correlated by means of empirical correlations. This paper is probably the
first reported work in the literature on flash points of TiAP containing solutions.
Authors:Shekhar Kumar, S. Balasubramonian, Pranay Sinha, D. Sivakumar, U. Kamachi Mudali, and R. Natarajan
Thermophysical properties of reversed TALSPEAK extractant (0.3 M D2EPHA/0.2 M TBP/n-dodecane) were not available in literature. Authors have experimentally measured and correlated several thermophysical properties
of RT solvent like density, viscosity, refractive index, acid uptake and flash point. In this paper, results of these studies
will be discussed in detail.
Authors:Pranay Sinha, Shekhar Kumar, U. Kamachi Mudali, and R. Natarajan
Phenyl trifluoromethyl sulfone (FS-13) is an inert diluent used in HCCD/PEG process for isolation and recovery of cesium and
strontium from highly radioactive raffinate waste. There is no experimental data available in open literature describing pressurization
due to the thermal decomposition of FS-13 at elevated temperatures. Experiments were conducted for determination of flash
point and heating of FS-13 under pressurized closed-vent conditions in an adiabatic calorimeter. During adiabatic experiments,
negligible pressurization was observed.
Summary The different spreading regimes above liquid fuels have been experimentally characterized for surface temperatures close to the flash-point temperature. Two different spreading regimes are observed: for temperatures larger than some critical value, flame spreading velocity is well described by the De Ris solid fuel-like model. For temperature values lower than the critical one, a preheating thermocapillary region has been observed in the fuel, which can be described by a purely thermodynamic non-reactive model. The critical transition temperature has shown to present common characteristics for the four alcohols used in the experiments.
The design and testing of a new emulsifying liquid scintillant for the radioassay of aqueous samples is described. The scintillant is based on cyclohexylbenzene which has a high flash point and low toxicity. A suitable combination of surfactant and cyclohexylbenzene/PPO scintillator was developed by the construction and comparison of triangular contour diagrams, as described by FOX1 for each, of several commonly-encountered aqueous sample types. The chosen ölend of surfactant, cyclohexylbenzene and PPO was further refined with a second surfactant. This was achieved by the construction of a diagram of temperature v.s. water content for each of several blends, each containing a different surfactant combination. Similar diagrams were constructed to illustrate the compatibility of several aqueous sample types with the chosen composition. SCR and AESCR quench correction curves were constructed for each sample type.
The processes involved
in flame spreading over liquid fuels are subject of this work. A heat and
momentum transfer analysis has been undertaken for fuel temperatures below
the flash-point that confirms (within this range of temperatures studied in
this work) that flame spreading is assisted by a convection pattern ahead
of the flame. This assistance mechanism, which is not observed for solid fuels,
is the origin (for lower temperatures) of a pulsating behaviour of the flame.
A first experimental determination of the characteristic horizontal length
of this assistance zone will be given. The analysis of our data lead us to
conclude that flame spreading can be reduced by simultaneously preventing
the formation of the convection zone and reducing the fuel surface temperature.
Authors:Adebayo Surajudeen Adekunle, Adekunle Akanni Adeleke, Peter Pelumi Ikubanni, Peter Olorunleke Omoniyi, Tajudeen Adelani Gbadamosi, and Jamiu Kolawole Odusote
value, flashpoint, pour point, and free fatty acid were analyzed in accordance to International Standard. 2.3 Casting of Al-alloy rods Al-alloy rods were produced using sand casting method to obtain 15 mm diameter cast cylindrical rods and then machined