Gassiness

B) Gassiness from malolactic fermentation vinhos verdes wines (from Portugal, white and red)... 

Although it is sometimes encouraged in white wines, particularly barrel-fermented Chardonnay, this fermentation tends to lower fmitiness and be considered undesirable in other white wines unless acidity is too high. This is also tme for pink and light red wines. If it occurs after bottling, a gassy, cloudy wine results. In such wines, it can be avoided by careful attention to clarification or filtration sufficient to remove the bacteria, by adding SO2 at appropriate intervals as an inhibitor, or by pasteurization. 

Reactive System Screening Tool (RSST) The RSST is a calorimeter that quickly and safely determines reactive chemical hazards. It approaches the ease of use of the DSC with the accuracy of the VSP. The apparatus measures sample temperature and pressure within a sample containment vessel. Tne RSST determines the potential for runaway reactions and measures the rate of temperature and pressure rise (for gassy reactions) to allow determinations of the energy and gas release rates. This information can be combined with simplified methods to assess reac tor safety system relief vent reqiiire-ments. It is especially useful when there is a need to screen a large number of different chemicals and processes. 

Chemical Designations - Synonyms Dimethylmethane Chemical Formula CH3CH2CH3. Observabie Characteristics - Physical State (as normally shipped) Liquefied compressed gas Color Colorless Odor Faint gassy. 

A survey within the Fine Chemieal Manufaeturing Organization of ICI has shown that gassy reaetion systems predominate due to established proeesses sueh as nitrations, diazotizations, sulphonations, and many other types of reaetions [22]. Very few vapor pressure systems have been identified that also generate permanent gas (i.e., hybrid type). 

Vent areas and diameters of the vapor, gassy, and hybrid systems... 

The major method of vent sizing for gassy system is two-phase venting to keep the pressure eonstant. This method was employed before DIERS with an appropriate safety faetor [34], The vent area is expressed by ... 

The reaetion—vapor, gassy, or hybrid Flow regime—foamy or nonfoamy... 

Using Equation 12-30 for a gassy reaction, the charge amount is ... 

Gassy system In gassy systems, the pressure is due to a permanent gas that is generated by the reaetion. 

Metal.) gas puddling, gasfuhrend, a. containing gas. gassy. GasgeblMse, n. gas blast gas blast apparatus, gas-gefeuert, a. gas-fired, gas-heated, -ge-ftillt, a. gas-filled. 

Thakur, P. (1997). Methane Drainage from Gassy Mines. In Proceedings, Siicth International Mine Ventilation Congress, ed. R. V. Ramani. Littleton, CO SME. 

Leung, J. C., Vent Sizing for Gassy and Hybrid Systems, in Safety of Chemical Batch Reactors and Storage Tanks, Benuzzi, A. and Zaldivar,J. M. (ed), 299-310, Kluwer Academic Publishers, Dordrecht, April 1991. 

An important example of the first type is the oil smoke pot which is powered by a slow burning, gassy pyrotechnic mixt such as amm nitrate and amm chloride with a small amount of carbonaceous fuel. The resulting gas jet pulls a stream of oil from a reservoir and injects it into a venturi where the formation of the aerosol takes place... 

As propagation rates of gassy reactions are pressure dependent, so are gasless reactions temp dependent. This temp dependence has been... 

From the days of Nobel to about 1950 the scientific basis of commercial explosives remained relatively unchanged, although continuous and numerous improvements in manufacturing methods occurred throughout the world. There were, however, many advances in military explosives, note of which will be made later. These advances were, of course, largely due to the two world wars, which occurred since the death of Alfred Nobel. There were also many advances in the development of permitted explosives designed for use in gassy coal mines. 

Gassy coal mine. A mine in which methane may be present also known as a safety lamp mine. 

Permitted Explosive. An explosive which is authorised for use in gassy coal mines. 

Safety lamp mine. Alternative name for gassy mine, implying possible presence of methane. 

Data may be simple physical properties or sophisticated calorimeter data to characterize two phase flow (including gassy systems and/or high viscosity laminar flow systems). 

Describe a runaway that is gassy. See Grossel and Louvar (2000). 

The first indication of breakthrough of the C02 occurred in samples from all 3 U-tube samplers on 17 July, 2008 with slightly elevated C02 content and the presence of tracers. In mid-August, U2 became gassy and the pH dropped significantly. There was no coincident change in either the alkalinity or cation concentrations. By early September, U2 had converted entirely to gas lift. Over the same time frame, as the pH decreases, the per cent of C02 in the U2 samples (for gas exsolved from the water sample through decrease from formation to atmospheric pressure) increased from 4% to >40%. 

The data required for the emergency vent design includes [191] (1) the thermokinetic and pressure history monitored under near adiabatic conditions, (2) the character of the type of vented system (vapor, gassy, or hybrid), (3) the phase of the vented material (vapor, liquid, or two-phase), and (4) the degree of two-phase disengagement (turbulent, bubbly, or homogeneous). To determine these characteristics, the VSP defines the system as viscous (100 cp) or nonviscous, and also whether or not it has a foaming tendency. 

Gassy or nontempered systems—the total pressure is due to the fact that the reaction produces permanent gases, and... 

A simplified VSP procedure which enables a quick estimate of the required vent diameter is discussed in [191]. The venting characteristics in connection with runaway chemical reactions can be related to vapor and gassy (including hybrid) systems. 

For some gassy systems (Ap/At driven), viscosity considerations become important which make testing difficult if not prohibitive. 

For gassy and for tempered systems, the flow rate can also be measured in a simulated vent line (same 1/d ratio) of diameter do. Additional calculation formulas are given in [191]. 

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