As an example of the application of a fixed-bed tubular reactor, consider the production of methanol. Synthesis gas (a mixture of hydrogen, carbon monoxide, and carbon dioxide) is reacted over a copper-based cat dyst. The main reactions are  [c.56]

Incineration. Incinerators were discussed in Sec. 11.1. When incinerators are used to treat gaseous pollutants in relatively low concentration, auxiliary firing from fuel or other waste material normally will be necessary. The capital and operating costs may be high. In addition, long duct lines are often necessary.  [c.305]

It is prepared commercially by treating benzene diazonium chloride with sodium sulphite and then reducing the mixture with zinc dust and ethanoic acid. It can also be prepared by reduction of benzene diazonium chloride with SnCl.  [c.305]

Gasoline engine equipment such as carburetors, injectors, intake manifolds, valve systems and combustion chambers, are subject to fouling by the fuel itself, the gases recycled from the crankcase, or even dust and particulates arriving with poorly filtered air. Three types of problems then result  [c.243]

Organic polyesters, obtained either from a diacid and a mono-alcohoi, or from poly-alcohols and a monoacid, or from di-alcohols and a diacid. This class represented 29% of the synthetic base market in France in 1992.  [c.279]

Lithium complex soap greases, obtained by the reaction of lithium hydroxide and a mixture of 12-hydroxy-stearic acid with an organic diacid (generally azelaic acid). These greases have very good high temperature properties, remarkable mechanical stability, a good resistance to water, and replace conventional lithium soap greases whenever the latter s properties become marginal for the intended application.  [c.281]

These systems have been operated in extremely low quality (and radioactivity contaminated) industrial environments for the past several years without any major equipment or component failures. Utilizing specialized operating/warm-up procedures, they have operated in low grade, out-of-doors, dust ridden, rain-soaked, industrial environments at temperature ranges which greatly exceed the original equipment manufacturers (OEM) specified limits. The systems have been successfully operated at ambient temperatures of minus 10 to plus 103 degrees Fahrenheit without any pre-mature or un-anticipated equipment failures.  [c.612]

Cracks depth measurement in pipe - lines, boilers, rotor duct, on turbines blades, in tread rings, welds etc.  [c.652]

Therefore we proposed, that if the duct was not instantly hit, two more drillings with a horizontal distance of 2,5cm left and right to the measured position should be made. This insured striking the duct.  [c.755]

At core B2 a transverse crack going through from the surface down to the duct was found, as well as some weak Fig. 6 Drill core B2 reinforcement bars. Because both the crack and the bars could  [c.755]

Bag filters. Bag filters, as discussed in Chap. 3 and illustrated in Fig. 3.66, are probably the most common method of separating particulate materials from gases. A cloth or felt filter material is used that is impervious to the particles. Bag filters are suitable for use in very high dust load conditions. They have an extremely high efficiency, but they suflFer from the disadvantage that the pressure drop across them may be high.  [c.303]

C. Insoluble in water, soluble in organic solvents. Flavone occurs naturally as dust on the flowers and leaves of primulas. It has been prepared from o-hydroxyacetophenone and benzaldehyde.  [c.176]

Nylon A class of synthetic fibres and plastics, polyamides. Manufactured by condensation polymerization of ct, oj-aminomonocarboxylic acids or of aliphatic diamines with aliphatic dicarboxylic acids. Also rormed specifically, e.g. from caprolactam. The different Nylons are identified by reference to the carbon numbers of the diacid and diamine (e.g. Nylon 66 is from hexamethylene diamine and adipic acid). Thermoplastic materials with high m.p., insolubility, toughness, impact resistance, low friction. Used in monofilaments, textiles, cables, insulation and in packing materials. U.S. production 1983 11 megatonnes.  [c.284]

ZnS204. Made SO2 on aqueous suspension of Zn dust. Used in bleaches and the vat dyeing process.  [c.433]

These characteristic absorption regions called group frequencies allow the analyst to detect the different elemental patterns and from them to reconstruct the molecule either by dej duct ion or by comparison with library reference spectra. The libraries contaih severaY hundred thousand spectra.  [c.59]

Faults may extend over several hundreds of kilometres or may be restricted to the deformation of individual grains. They create vast potential traps for the accumulation of oil and gas. Flowever, they often dissect reservoirs and seal fluid and pressures in numerous individual compartments. Each of these isolated blocks may require individual dedicated wells for production and injection. Reservoir compartmentalisation through small scale faulting can thus severely downgrade the profitability of a field under development. In the worst case faulting is not detected until development is in an advanced stage. Early 3D seismic surveys will help to obtain a realistic assessment of fault density and possibly indicate the sealing potential of individual faults. Flowever, small scale faults with a displacement throw) of less than some 8m are not detectable using seismic alone. Geostatistical techniques can then be used to predict their frequency and direction.  [c.83]

The three sets of data chosen for the comparisons between experiment and simulation have been supplied by Dr. S. K. Burke of the DSTO Aeronautical and Maritime Research Laboratory (Melbourne, Australia).  [c.142]

In the first mode a LMA value and number of wires broken per a lot of the rope length (definited in a number of the rope diameter) as like as a register of inspection data can be performed by the 4 digit LED display. After the inspection the data can be displayed in turn.  [c.336]

Following the draft european standard [4] for type testing, quality of the detection media shall be verified on 2 reference blocks as shown in Fig. 2. On the reference block No. 1, created by Mr. Dickhaut [7], (Nr. 3 of the MTU) the indications shall be valuated by comparison with the indications of a detection medium with known quality. On reference block No. 2 (AFNOR-C A-C) the lenght of the indications shall be determined as a measure for the quality.  [c.672]

Minkov.D. and Shoji.T., Third International Workshop E NDE 97, Workshop Digest, pp.76-77  [c.692]

Impression of the surface (ISxlScmh with a drill hole into a duct  [c.754]

Accidentially, one of the drills (core B2, Fig. 6) hit a duct. The depth of the duct was 15cm with a diameter of 3cm. According to these parameters and the geometry, which former studies [Ref 1] concluded, the dectection of a defect (here the duct) under these conditions would be possible if at least one dimension of the defect exceeds 4cm. Since the duct s diameter was only 3 cm, whereas the parameter of the testing-system was 4cm, possibly more than one drill would be needed to hit a duct.  [c.755]

According to these preliminary testings, we proposed the following procedure. Because there was only slight cracking at the upper section of the silo (marked in Fig. 7), it would be most promising to start the testing there. In the case of dectecting significant echos from a duct, we would drill directly into the building on trial to test the result. Furthermore, it was assumed that the ducts would lie completely vertically. Because there was a poor chance of the ultrasound-testing beeing successful at the lower, extremly cracked injection area, it was proposed to localize the ducts there by connecting the positions found in the upper section vertically down to the lower section with a vertical lead line (distance ca. 15m). After marking the measured position of the ducts, they should be found by drilling on trial there as well. In the same way, the holes for the ventilation during injection, at the top of the building should be drilled.  [c.755]

The second main testing task was to localize the position of the next duct and to establish a, more than likely regular, grid. After consulting the owner s engineers it could only be estimated, that the grid would be between 1 - 4m. We then conducted a continious scan over a full length of 4m.  [c.757]

See pages that mention the term Dakota : [c.304]    [c.304]    [c.18]    [c.40]    [c.74]    [c.75]    [c.76]    [c.115]    [c.117]    [c.129]    [c.143]    [c.143]    [c.143]    [c.211]    [c.292]    [c.312]    [c.315]    [c.357]    [c.375]    [c.380]    [c.386]    [c.410]    [c.424]    [c.502]    [c.677]    [c.755]    [c.755]   
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