| 摘要 |
598858 Disclosed is a method for producing one or more fluid hydrocarbon products from a hydrocarbonaceous material comprising: feeding the hydrocarbonaceous material to a reactor; pyrolyzing within the reactor at least a portion of the hydro carbonaceous material under reaction conditions sufficient to produce one or more pyrolysis products; catalytically reacting within the reactor at least a portion of the one or more pyrolysis products under reaction conditions sufficient to produce one or more fluid hydrocarbon products comprising olefins and aromatics; separating at least a portion of the olefins in the fluid hydrocarbon products to produce a recycle stream comprising at least part of the separated olefins, and a product stream; and feeding at least a portion of the recycle stream to the reactor; wherein the fluid hydrocarbon product comprises an amount of aromatic compounds that is at least about 6 wt% of the total amount of the hydrocarbonaceous material used in producing the pyrolysis products and which is calculated as the weight of the aromatic compounds present in the fluid hydrocarbon product divided by the weight of the hydrocarbonaceous material used in producing the pyrolysis products. The methods are for the production of specific aromatic products (e.g., benzene, toluene, naphthalene, xylene, etc.) via catalytic pyrolysis. Some such methods may involve the use of a composition comprising a mixture of a solid hydrocarbonaceous material and a heterogeneous pyrolytic catalyst component. Further disclosed are method where an olefin compound may be co-fed to the reactor and/or separated from a product stream and recycled to the reactor to improve yield and/or selectivity of certain products. The methods described herein may also involve the use of specialized catalysts. For example, in some cases, zeolite catalysts may be used. In some instances, the catalysts are characterized by particle sizes in certain identified ranges that can lead to improve yield and/or selectivity of certain products. |
