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Gasifier feedstock

In general, utilization of high-sulfur char as a boiler fuel does not appear to be economically attractive. Char may be utilized as a gasifier feedstock this possibility is particularly attractive when the char contains gasification catalyst used as a coal pretreatment prior to hydrocarbonization. Finally, as noted above, it is possible to optimize hydrocarbonization processes for the production of no net char. [Pg.57]

After capital costs (which include the gasifier), feedstock costs and distribution costs are the two largest cost components for the production of hydrogen from biomass by gasification, in the committee s analysis (see Figures 5-2 and 5-4). The size of these two cost components is an inherent consequence of the low density of biomass as collected from... [Pg.117]

The use of adherent refractory mixed conducting catalysts on the partial oxidation surface of OTMs permits gasification of carbonaceous soUd feedstocks such as coal fines and biomass to be realized. Refractory catalysts can be selected which not only mediate oxygen to the reaction site from the membrane bulk, but more importantly can be tailored to have high resistance to potentially poisoning impurities, typified by sulfur-containing materials, present in the gasified feedstock. [Pg.200]

Heidenreich, S., Foscolo, P.U., Nacken, M Rapagnk, S. (2008) Gasification apparatus and method for generating syngas from gasifiable feedstock material, PCX Patent Application no. PCT/EP2008/003523. [Pg.381]

Process Pa.ra.meters, The most notable effects ia gasifiers are those of pressure (Fig. 1) and coal character. Some initial processiag of the coal feedstock maybe requited. The type and degree of pretreatment is a function of the process and/or the type of coal (see Coal conversion processes, CLEANING AND DESULFURIZATION). [Pg.65]

In summary, these second-generation gasifiers offer promise for the future in terms of increased efficiency as weU as for use of other feedstocks, such as biomass. The older, first-generation gasifiers, however, continue to be used. [Pg.72]

The means by which synthetic gaseous fuels could be produced from a variety of biomass sources are variable and many of the known gasification technologies can be appHed to the problem (70,71,76—82). For example, the Lurgi circulatory fluidized-bed gasifier is available for the production of gaseous products from biomass feedstocks as well as from coal (83,84). [Pg.75]

In this process, any sulfur present in the coal exits the gasifier as hydrogen sulfide which is removed by various processes such as a Hohnes-Stretford unit where the sulfide is absorbed and regenerated. The resulting sulfur is filtered out as a cake (39 wt %) which is sold as a valuable feedstock (see Coal CONVERSION PROCESSES, GASIFICATION SULFURREMOVAL AND RECOVERY). [Pg.454]

Ammonia (NHj) is produced from atmospheric nitrogen and hydrogen from a hydrocarbon source. Natural gas is the most commonly used hydrocarbon feedstock for new plants other feedstocks that have been used include naphtha, oil, and gasified coal. Natural gas is favored over the other feedstocks from an environmental perspective. [Pg.63]

Coal gasification is fuel flexible so that the process can use the most available feedstock at the best price. Gasifiers have successfully gasified hcar y fuel oil and combinations of oil and waste gas. Other possible gasification feedstock includes petroleum coke, trash, used tires, and sewage sludge. Various combinations of feedstocks and coal have been successfully gasified. [Pg.1180]


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Gasifiers

Gasifiers gasifier)

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