Feasibility technical

If gas mixtures contain condensable components (acc. to TRG 102, each gas with a critical temperature -10 C, as weU as each liquid) the filling pressure has to be limited in a way that these components do not condense under the filling pressure. As practice-oriented condensation temperatures +10 C are determined for summer (manufacturer-specific exception, according to TRG +5 °C) resp. 

Pgii = Filling pressure (gauge) at +15 °C in bar Pi = absolute vapour pressure of the condensable component i in bar Ki = Concentration of the condensable component in the mixture in % vol 

Result Pgj[=12bar i.e. a mixture with a butane volume fraction of 10% may only be filled up to 12 bar (based on the temperature +10 °C). 

Gases that can react amongst themselves must not be mixed (e.g. CO2 + NHj, SO2 + NHj). See also TRG 102, Appendix 2 Gas mixture diagram [9.7]. 

Mixtures of fuel gases and oxygen resp. synthetic air are only allowed to be filled, if after aU, their concentration lies in a concentration range, which has to be sufficiently below or above the respective explosion limit. For the filling of such mixtures (in Germany) a documented approval of the Federal Institute for Materials Research and Testing (BAM) has to be obtained. 

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In the feasibility phase the project is tested as a concept. Is it technically feasible and is it economically viable There may be a number of ways to perform a particular task (such as develop an oil field) and these have to be judged against economic criteria, availability of resources, and risk. At this stage estimates of cost and income (production) profiles will carry a considerable uncertainty range, but are used to filter out unrealistic options. Several options may remain under consideration at the end of a feasibility study. 

Decommissioning is often a complex and risky operation. The five key considerations are the potential impact on the environment, potential impact on human health and safety, technical feasibility, costs of the plan, and public acceptability. 

The procedure is technically feasible, but high recovery of unconverted raw materials is required for the route to be practical. Its development depends on the improvement of catalysts and separation methods and on the avaHabiUty of low cost acetic acid and formaldehyde. Both raw materials are dependent on ample supply of low cost methanol. 

Another advantage of PC technology is the plaimed and partially realized use of multiftmction drives for operation of either CD-ROM, WORM, or PC-R disks alternatively in the same disk drive. This is technically feasible, since for reading (in CD-ROM, WORM, PC-R) as well as for writing (WORM, PC-R) similar principles and hardware are used (108). However, the reflectivity change of PC disks (40/70%) is in general lower than the CD-ROM standard (30/70%) requires. 

The manufacture of the highly pure ketene required for ketenization and acetylation reactions is based on the pyrolysis of diketene, a method which has been employed in industrial manufacture. Conversion of diketene to monomeric ketene is accompHshed on an industrial scale by passing diketene vapor through a tube heated to 350—600°C. Thus, a convenient and technically feasible process for producing ketene uncontaminated by methane, other hydrocarbons, and carbon oxides, is available. Based on the feasibiHty of this process, diketene can be considered a more stable form of the unstable ketene. 

There are situations where thermal oxidation may be preferred over catalytic oxidation for exhaust streams that contain significant amounts of catalyst poisons and/or fouling agents, thermal oxidation may be the only technically feasible control where extremely high VOC destmction efficiencies of difficult to control VOC species are required, thermal oxidation may attain higher performance and for relatively rich VOC waste gas streams, ie, having >20 25% lower explosive limit (LEL), the gas stream s explosive properties and the potential for catalyst overheating may require the addition of dilution air to the waste gas stream (12). 

The processing of components that are on the limits of technical feasibility is likely to result in out of tolerance variation. High forces and flow restriction in metalworking and metal cutting processes can lead to instability. Also, material flow in casting processes, where abnormal sections and complex geometries are present, can lead to variability problems and defects. 

Manufacturing and technical feasibility of new component design solutions need to be validated... 

As has been mentioned earlier, the CID generates a number Ni , of composition intervals. Within each interval, it is thermodynamically as well as technically feasible to transfer a certain mass of the key pollutant from a waste stream to a lean stream. Furthermore, it is feasible to pass mass from a waste stream in an interval to any lean stream in a lower interval. Hence, for the J th composition interval, one can write the following component material balance for the key pollutant ... 

Hiickel models of molecular electronic structure enjoyed many years of popularity, particularly the r-electron variants. Authors sought to extract the last possible amount of information from these models, perhaps because nothing more refined was technically feasible at the time. Thus, for example, the inductive effect was studied. The inductive effect is a key concept in organic chemistry a group R should show a - -1 or a —I effect (according to the nature of the group R) when it is substituted into a benzene ring. 

These types are most common in power station-sized boilers and process industries such as cement and gypsum, where the residual ash is absorbed in the process. As their application is at the larger end of the combustion field, on-site milling and preparation is technically feasible and... 

AS of this writing, 100% inspection by NAA of small arms primers in an actual production loading plant has not been implemented, nor is it contemplated in the near future. Technical problems exist related to coupling the present state-of-the-art nuclear components with the high production rates for the primers, namely, tens of units per sec per automatic loading line. The high intensity of the neutron source and the complexity of the detection system required detracts from the utility of the method in a plant environment where simplicity and safety of operation are of paramount importance. Nevertheless, the technical feasibility of the method has been demonstrated by the AMMRC study and future developments in nuclear activation hardware may ultimately make this non-destructive inspection for production primers more viable... 

Although obviously less expensive electron conducting catalyst supports have to be sought for practical applications, this study has clearly established the technical feasibility of inducing NEMCA on finely dispersed noble metal catalysts. 

Since plastics are generally made from hydrocarbon feedstocks they should be recycled to conserve energy. The most effectives energy conservation is to refabricate plastic items, though this is not always technically feasible. Under circumstances where recycling is not a feasible option the use of plastics in waste-derived fuels may be an acceptable conservation measure. 

Solution Now, Ar=107°C. Scaling with geometric similarity would force the temperature driving force to increase by S = 1.9, as before, but the scaled-up value is now 201°C. The coolant temperature would drop to —39°C, which is technically feasible but undesirable. Scaling with constant pressure forces an even lower coolant temperature. A scaleup with constant heat transfer becomes attractive. 

This paper demonstrates the technical feasibility of a plastics energy recovery plant using circulating fluidised bed technology from Ahlstrom of Finland. Full details are given of a two-phase test run conducted at Ahlstrom s pilot plant in Karhula, in order to obtain information on the process behaviour when combusting different types of plastics waste. Results are presented and conclusions drawn. 

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