Method and apparatus for producing a hydrocarbon fraction and a hydrocarbon fraction and its use
A technology for hydrocarbon fractions and equipment, which is applied in the preparation of liquid hydrocarbon mixtures, hydrocarbon distillation, chemical instruments and methods, etc., can solve the problems of high scale of BTL factories, etc., and achieve the effect of easy transformation or regeneration
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Embodiment 1
[0046] figure 1 The plant comprises two fixed bed reactors 2, 4 and a distillation unit 6 to form a hydrocarbon fraction 7 from a biomass-based synthesis gas 1 . The first reactor 2 and the second reactor 4 are arranged in series and connected together. A distillation unit 6 is connected to the second reactor 4 .
[0047] The synthesis gas 1 is fed to a first reactor 2 comprising a first catalyst bed 3 comprising an Fe-based catalyst, and the treated synthesis gas product from the first reactor 2 is fed to a second reactor 4 To form the hydrocarbon composition 9, the second reactor 4 comprises a second catalyst bed 5 comprising a Co-based catalyst. The hydrocarbon composition 9 from the second reactor 4 is fed to the distillation unit 6, wherein a hydrocarbon fraction 7 is separated from the hydrocarbon composition by distillation, preferably, the hydrocarbon fraction has a distillation region of 30 to 200° C., and the hydrocarbon fraction contains preferably More than 60% ...
Embodiment 2
[0053] In this example, a hydrocarbon fraction is formed from biomass-based synthesis gas. A hydrocarbon fraction is formed by means of the apparatus of Example 1.
[0054] The hydrocarbon fraction 7 is formed by using a combination of two catalyst layers (Fe-based catalyst layer 3 and Co-based catalyst layer 5 ). Typical properties of the catalysts are summarized in Table 1.
[0055] Table 1
[0056]
[0057]
[0058] In the first reaction step 2, an alpha-olefin-rich synthesis gas product is formed over an iron catalyst at a low pressure of about 6 bar. The temperature is about 230°C. In addition to olefins, the product contains paraffins, small amounts of other olefins and about 5 to 8% by weight of oxygenated products (mainly n-alcohols), such as oxygenates. Due to the natural iron catalyst of the water gas shift, the hydrogen to carbon ratio of the syngas may be relatively low without the need for a separate water gas shift (WGS) unit. In biomass-based syngas, ...
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