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Sulfur test results

The reproducibility of test results between labs using the neutral salt spray tests has not been consistent, but the repeatability, within one lab, is better, and the test has value in comparing variations in coating systems. Correlation of hours of exposure in the salt spray test to actual performance of the plated part in service, even in marine atmospheres, is not consistent and usually avoided. A classic example is that cadmium deposits outlast zinc deposits on steel in salt spray tests and clean marine atmospheres, yet zinc outlasts cadmium when exposed to real, industrial atmospheres, because of the presence of sulfur-bearing corrodents in industrial environments. An important variable in salt spray testing is the position of the surface to be tested. Whereas the surface of test panels is specified to be 15—30° from the vertical (40), when salt spray testing chromated zinc-plated specimens, this range has appeared excessive (41). [Pg.151]

Global has also designed and built a dual-stage, low-temperature adsorbent desulfurizer. Sulfur in propane can exceed as much as 300-ppm compared to natural gas, which ranges from 2 to 15-ppm sulfur and it must be removed to block any poisoning of the fuel cell. The test results indicated that no sulfur compounds were present in the outlet gas of the desulfurizer. The system design uses a modular assembly and layout, including a circular hot box where the fuel cell stacks and the fuel processor are located and easily accessed. [Pg.186]

We applied TFA to hydrolysis of polysaccharides under various conditions (7,8,9). Many tests have shown that some troubles known from sulfuric acid treatment can be eliminated using TFA. In addition, the tests resulted in a wide applicability and flexibility of the method, and it can be easily adapted to many polysaccharides. [Pg.148]

An emissions test of the pyro-gas was conducted at Conrad on December 18, 1986, while pyrolyzing TDF. Measurements included particulate, metals, volatile and semi-volatile organic compounds, sulfur dioxide (S02), nitrogen oxides (NOx), carbon dioxide (C02), oxygen (02), and carbon monoxide (CO).1 The test results are presented in Table 8-3. Note that these emission estimates do not reflect atmospheric emissions. [Pg.304]

The use of sulfur compounds was subject to further testing. Results are yet to be published. [Pg.71]

The Consolidated Edison test results, as shown in Table VI, indicated complete suitability of SRC-II coal liquids as a high quality boiler fuel. No operational problems were encountered and no deposits were observed. Combustion efficiency was comparable to that for the low-sulfur No. 6 fuel oil, as were the levels of carbon monoxide and hydrocarbon emissions. Modifications to burner equipment required to handle the SRC-II fuel oil are considered to be no more extensive than those required for similar variations in petroleum fuels. Particulate emissions for the SRC-II fuel oil were generally lower than for the No. 6 fuel oil, and were in all cases below the new source performance standards proposed by EPA (0.03 lbs/MM Btu). [Pg.73]

The screening is being done in 98 w/o sulfuric acid. Materials samples are placed in the liquid and vapor phases of the test vessel, as well as at the liquid/vapor interface. Typical test results are shown in Figures 10, 11, and 12. As is apparent, commercially available metallic alloys do not appear to be able to survive the operating environment. Silicon containing materials, however, used as structures or protective coatings on metallic alloys, appear to have promise of fulfilling the process needs. [Pg.380]

Materials evaluation is being performed in two test facilities, one operating at the reduction reactor inlet conditions and one at the outlet conditions. Test results, such as shown in Figures 13 and 14, identify several materials as candidates for use in the sulfur trioxide reduction reactor. [Pg.380]

Achieving the required degree of desulfurization dictated electrothermal heating. Fixed-bed electrothermal furnaces of the Acheson type were initially considered for use directly with granular coke but the test results were disappointing. The product of the Acheson furnace was not uniform in its sulfur content. Adaptation of the Acheson Process, which is a batch process, presented problems in materials handling that were considered very difficult to resolve at the 10,000 tons per year capacity determined to be the... [Pg.210]

Similar test results for intimate mixtures of potassium nitrate and red phosphorus 2 31, potassium chlorate and red phosphorus 3 2 and potassium chlorate and sulfur 3 2 are... [Pg.101]

Pipet 10.0 mL of Hydrochloric Acid Solution into each flask, stopper each flask, and swirl gently until the carbon is completely wetted. Loosen the stoppers to vent the flasks, place on a hot plate in a fume hood, and bring the contents to a boil. Allow to boil gently for 30 2 s to remove any sulfur (which may interfere with the test results). Remove the flasks from the hot plate and cool to room temperature. [Pg.95]

Emissions. An environmental assessment has been carried out to evaluate the effects of sulfur-asphalt during and after construction. Ambient air samples were taken from points around the pugmill and paver and analyzed for hydrogen sulfide (H2S), sulfur dioxide (S02), carbon disulfide (CS2), carbonyl sulfide (COS), mercaptans (RSH), and total hydrocarbons. The results indicated that no problems exist in terms of current health standards during construction or after. Typical test results obtained at the pugmill and methods used are given in Table II. [Pg.130]

Many of the materials used to trap vanadium by chemical reaction also share a similar chemistry with the oxides of sulfur a prevalent contaminant in FCC feed stocks. Sites which trap vanadium are thereby competed for by sulfur species. Results obtained by incorporating a feed contaminant, such as sulfur, in a competition with vanadium demonstrate the importance of including sulfur in vanadium tolerance testing and will be discussed. The ETM test offers the ability to study what happens under just such a competition. [Pg.297]

The test results show that n-paraffin (1) linearly raises the cetane of unadditized diesel without a top-end limit (2) can linearly raise the cetane of nonresponsive diesel blends (3) is synergistic with traditional cetane improvers (4) has a low sulfur content and (5) increases endproduct volume added (4, 5). When n-alkanes and cetane enhancers were added to a diesel fuel with a cetane number of 32 to raise the cetane number to 43, a 10% reduction in carbon dioxide emissions was achieved. [Pg.3229]

All the polymers contained some thiolic sulfur. The results of the tests are summarized in Table I, which shows the temperature at which the apex corresponding to each functional group appears. [Pg.242]

Dialkoxides with an extra donor atom have been also tested as ethylene, propylene, and 1-hexene polymerization catalysts.1 The first reports showed that an additional sulfur donor results in quite high ethylene and... [Pg.1091]

Two methods describe the use of X ray techniques for sulfur determination and can be applied to the determination of sulfur in samples with sulfur content of 0.001-5.0% w/w (ASTM D-2622, ASTM D-4294). Oil viscosity is not a critical factor with these two methods, but interference may affect test results when chlorine, phosphorus, heavy metals, and possibly sihcon are present. A method is also available for very low sulfur concentrations (ASTM D-4045).This is normally used for lower-viscosity fractions but may be used for some viscous oils that boil below 371°C (700°F). The method is designed to measure sulfur in the range of 0.02 to 10 ppm. Sulfur may also be determined along with metals (ASTM D-4927, ASTM D-4951, ASTM D-5185). [Pg.227]

Field Tests. A series of nine test plots were sprayed with modified sulfur mixtures which were based on the laboratory penetration and reaction test results. Rectangular test plots 6 X 7% ft (1/1000 acre) were built and filled with fine construction sand. Before spraying with the molten sulfur, half of each plot was textured by raking to produce a... [Pg.75]

Impermeability. Most naturally occurring sands are sorted materials which tend to be one-sized and have high voids contents. Generally, sufficient mix workability, stability, and other mechanical properties may be attained without completely filling the voids in the sand. This results in mixes with air voids often in excess of 10%. Test results, both in the laboratory and in the field, have shown however that such mixes are not necessarily permeable to water. It is believed that the sulfur network throughout the mix tends to isolate the air voids, thereby governing mix impermeability. [Pg.101]

The Marshall stability test results in Figure 7 indicate that all of the mixes with low sulfur contents were unacceptably unstable. The stability of all of the mixes increases with increasing sulfur content. The medium-and coarse-sand mixes benefited the most from sulfur addition. They exhibited higher Marshall stabilities at lower sulfur contents than other mixes and at higher sulfur contents exceeded 2000 lb. (8900N), the usual upper limit attainable for high quality asphalt concrete mixes. [Pg.103]


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See also in sourсe #XX -- [ Pg.62 , Pg.63 , Pg.64 ]




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