适用于c2-c3烷烃/烯烃分离的新颖碳分子筛和丸粒组合物

Novel carbon molecular sieve and pellet compositions useful for C2-C3 alkane/alkene separations

Abstract

新颖微孔碳分子筛可以用作碳吸附剂丸粒的基底,所述碳吸附剂丸粒具有碳化粘合剂和碳化前体的离散区域;平均孔径大于或等于1微米并且总大孔隙率为至少30%的大孔,以上两者都是如通过汞孔隙率测定法所测量;以及能够选择性准入C2-C3烯烃并且排除C2-C3烷烃并且总微孔率在10%到30%范围内的微孔。所述丸粒可以通过在500℃到1000℃范围内的温度下、在惰性气氛和适合于形成所描述的丸粒的其它条件下使包含碳形成、非熔融粘合剂和无孔凝胶型磺化聚苯乙烯前体的丸粒结构热解来制备。所述丸粒尤其适用于用以分离C2-C3烷烃/烯烃混合物的变压和变温吸附方法。
A novel microporous carbon molecular sieve may be used as the basis for carbon adsorbent pellets that have discrete areas of carbonized binder and of carbonized precursor, macropores having an average pore diameter greater than or equal to 1 micrometer and a total macroporosity of at least 30 percent, both as measured by mercury porosimetry, and micropores that are capable of selectively admitting a C2-C3 alkene and excluding a C2-C3 alkane, and a total microporosity ranging from 10 percent to 30 percent. The pellets may be prepared by pyrolyzing a pellet structure comprising a carbon forming, non-melting binder and a non-porous gel type sulfonated polystyrene precursor at a temperature ranging from 500 DEG C to 1000 DEG C, under an inert atmosphere and other conditions suitable to form the described pellets. The pellets are particularly useful in pressure swing and temperature swing adsorption processes to separate C2-C3 alkane/alkene mixtures.

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    Title
    H. NAKAGAWA ET AL.: "Control of micropore formation in the carbonized ion exchange resin by utilizing pillar effect", 《CARBON》

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