05-01-2017 дата публикации
Номер: US20170002270A1
Автор:
CHENG YU-TING,
Frank Victoria L.,
Goud Sandeep,
HAN Scott,
Igoe,
JR. WILLIAM F.,
Mazanec Terry,
Schneidkraut Marc,
Shi Jian,
Song Ruozhi,
Sorensen Charles
Принадлежит:
The present invention provides an improved catalytic fast pyrolysis process for increased yield of useful and desirable products. In particular, the process comprises an improved catalytic fast pyrolysis process for producing aromatic compounds, such as, for example, benzene, toluene and xylenes, from biomass feedstock containing impurities, such as, for example alkali and alkaline earth metal, sulfur and nitrogen components. 1. An improved catalytic fast pyrolysis process comprising steps of:a) treating biomass containing alkali and alkaline earth metal components to reduce alkali and alkaline earth metal content to result in treated biomass,b) feeding the treated biomass of step a), catalyst composition, and transport fluid to a catalytic fast pyrolysis process fluidized bed reactor maintained at reaction conditions to manufacture a raw fluid product stream,c) feeding the raw fluid product stream of step b) to a solids separation and stripping system to produce separated solids and a fluid product stream,d) feeding the fluid product stream of step c) to a vapor/liquid separation system to produce a liquid phase stream comprising components selected from the group consisting of water, char, coke, ash, catalyst fines, water soluble organics and heavy organics, and combinations thereof, and a vapor phase stream comprising benzene, toluene xylenes, olefins having carbon numbers of 2 to 4, methane, carbon monoxide, and carbon dioxide, ande) feeding the vapor phase stream of step d) to a product recovery system to recover benzene, toluene, xylenes and, optionally, olefins.2. The process of wherein step a) comprises steps 1) sizing the biomass to ≦20 cm size particles claim 1 , 2) washing the sized biomass of step 1) in at least one washing cycle with a washing fluid sufficiently to reduce the content of alkali and alkaline earth metals claim 1 , 3) optionally rinsing the washed biomass of step 2) with rinsing fluid claim 1 , 4) drying the biomass to reduce water content ...
Подробнее
