| 摘要 |
1529850 Coal hydrocarbonization UNION CARBIDE CORP 23 Dec 1975 [27 Dec 1974] 52600/75 Heading C5E A process for the hydrocarbonization of coal particles employing a fluid bed reaction zone comprises the steps: (a) pressurizing said particles with a hydrogen-rich gas; (b) fluidizing said particles with a non-oxidizing gas to form a dense phase; (c) optionally preheating said coal particles in said dense phase in a substantially oxygen-free environment to a temperature below a temperature at which said coal particles undergo plastic transformation; (d) providing a fluid-bed within said zone for hydrocarbonization at a reaction temperature of from 480‹ C. to 600‹ C., said fluidbed comprising a matrix of non-agglomerating particles at said reaction temperature fluidized by a hydrogen-rich (defined), oxygen-free gas; (e) continuously introducing said coal particles and a hydrogen-rich, oxygen-free conveying gas into the lower portion of said zone in substantially vertically upwards direction, said coal particles having a velocity sufficient to disperse rapidly and uniformly within said matrix at said predetermined temperature; (f) continuously reacting said coal particles in said zone with hydrogen in said zone at said reaction temperature to produce a product comprising a condensable vapour and solid char; (g) maintaining the solids in said zone for an average residence time of 5 to 60 minutes and said vapour for 10 to 250 seconds; (h) maintaining the average hydrogen partial pressure in said zone at 100 p.s.i. to 1200 p.s.i.; and (i) continuously withdrawing from said zone said product vapour and solids. Oil recovered from the condensable vapour product may be recycled by upward injection into the reaction zone. |
