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    Production of pure carbon dioxide
    16.
    发明授权
    Production of pure carbon dioxide 失效
    生产纯二氧化碳

    公开(公告)号：US2665971A

    公开(公告)日：1954-01-12

    申请号：US9281249

    申请日：1949-05-12

    申请人： STANDARD OIL DEV CO

    发明人： LEWIS WARREN K ,  GILLILAND EDWIN R

    IPC分类号： B01J8/30 ,  C01B32/50

    CPC分类号： B01J8/30 ,  C01B32/50

    摘要： Pure carbon dioxide is produced by oxidizing solid, liquid or gaseous carbonaceous materials such as charcoal, coke, coal or gaseous hydrocarbons such as methane, with excess hot metallic oxide such as ferric, cupric, stannic oxides or vanadium pentoxide, at a temperature below the sintering temperature of the oxide, but sufficiently high for the oxygen of the metallic oxide to react with the carbon to produce carbon dioxide. A fluidized or moving bed is employed to contact the oxide with the carbonaceous material, the spent oxide being removed, regenerated by treatment with air, and recycled. In Fig. 1, carbonaceous material such as coke is fed from vessel 2 to reactor 1 containing fluidized beds of regenerated oxide. Pure carbon dioxide is withdrawn at 11, a small portion being recycled through line 14 to assist fluidization. Spent oxide is withdrawn from the lowest bed at 17 and is entrained in a stream of air in pipe 18 and passed to a regenerator 7 where it is regenerated by contact with air entering from pipe 21. Ash is removed from the regenerator at 30 and the regenerated oxide is recycled to the reactor through line 9, carbon dioxide being employed as the entraining gas. In the moving bed arrangement shown in Fig. 3, a number of alternate carbonaceous material and metal oxide containing chambers are provided and are fed by lines 5 and 6 respectively. The chambers are connected severally by pipes 7 and 8 with respect to their solids content and serially in respect of gas flow. A mixture of carbon monoxide and carbon dioxide, in part recycled from a point between the last two chambers through line 14, enters the lowest oxide chamber where the monoxide is oxidized to the dioxide which, passing to the superadjacent carbon containing chamber, is reduced to carbon monoxide. The final chamber contains oxide and the effluent therefrom is pure carbon dioxide. Spent oxide is withdrawn at 9 and passed to a regenerator to re-enter at 5, whilst the coke is withdrawn at 15 from the lowest carbon containing chamber, the ash removed at 13 and the remainder passed to the upper carbon chamber by line 10.