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Filter-plugging tendency

In another test (ASTM D-2068), the filter plugging tendency of distillate fuel oil can be determined by passing a sample at a constant flow rate (20ml/min) through a glass fiber filter medium. The pressure drop across the filter is monitored during the passage of a fixed volume of test fuel. If a prescribed maximum pressure drop is reached before the total volume of fuel is filtered, the actual volume of fuel filtered at the time of maximum pressure drop is recorded. The apparatus is required to be calibrated at intervals. [Pg.210]

Fuel stability is an indication of the sediment- and gum-forming tendency of fuel. Gums and sediment can cause filter plugging and combustion chamber deposits and result in sticking of pumping and injection system components. [Pg.60]

Cold flow properties are of major importance in winter diesel. Cold performance limits are set to guarantee lack of crystallization. These are expressed as Cloud Point (CP), Pour Point (PP), or as Cold Filter Plugging Point (CFPP). For B100 biodiesel these have to be fully met with the biodiesel, and, if needed, with extra crystal retardation additives. In B2-B30 blends, though, the tendency is rather towards two types of Biodiesel, one for summertime (for example with CFPP of 0°C), and one for wintertime (for example with CFPP -10 °C). [Pg.87]

We developed an improved test, using much higher polymer solution throughputs than in previous tests. Berea sandstone cores (100-600 md permeahUity, 21% porosity) and various filters and filter combinations were used to measure the plugging tendency vs. throughput. Our new test was applied to compare many potential EOR polymers. [Pg.131]

The tendency of a (petrodiesel) fuel to gel or solidify at low temperature can be quantified by several experimental parameters such as Cloud Point (CP), Cold Filter Plugging Point (CFPP), and Pour Point (PP) [23, 31]. They are described in more detail below. The American and corresponding French and European standard methods are also given. [Pg.458]

Since cyclone filters can operate at elevated temperatures, the sensible heat in the product gas can be retained. Cyclone filters also remove condensed tars and alkali material from the gas stream, although the vaporized forms of those constituents remain in the gas stream. In practice, the separation of significant amounts of tars from the gas stream may be done sequentially by first removing particulates at higher temperatures, where tars remain vaporized. The gas stream is then cooled and condensed tars are removed. The step-wise approach reduces the tendency of particulate material to stick to tar-coated surfaces and contribute to plugging. [Pg.166]

Tars have a tendency to cling to the filter surface and can undergo subsequent carbonization reactions that lead to fouling and plugging. Even in the absence of further decomposition, tars are difficult to remove from these materials. Examples of barrier filters suitable for biomass systems include rigid, porous-candle, or cross-flow filters constructed of metal or ceramic bag filters constructed of woven material, and packed-bed filters. [Pg.167]

This non-ASTM method is utilized to help predict the tendency of waxy fuel to plug small lines leading from outdoor fuel storage tanks. Fuel which flows from storage through smaller transfer lines may deposit wax on the internal surface of these lines or onto filter screens. Accumulation of wax can restrict or halt the flow of fuel from the system. This problem usually occurs slightly below the cloud point of the fuel. [Pg.191]

In this respect filterability behavior is apparently related to the character of the deposits formed. The more crystalline the deposit the less tendency to plug filters... [Pg.520]

The temperature at which a cloud or haze of wax crystals appears at the bottom of a sample of lubricating oil in a test jar, when cooled under conditions prescribed by test method ASTM D 2500. Cloud point is an indicator of the tendency of the oil to plug filters or small orifices at cold operating temperatures. It is very similar to wax appearance point. [Pg.58]


See other pages where Filter-plugging tendency is mentioned: [Pg.191]    [Pg.191]    [Pg.92]    [Pg.17]    [Pg.15]    [Pg.782]    [Pg.56]    [Pg.185]    [Pg.24]    [Pg.450]    [Pg.145]    [Pg.209]    [Pg.185]    [Pg.1294]    [Pg.192]    [Pg.8]    [Pg.241]    [Pg.818]    [Pg.163]   


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