CO+H2经F-T反应途径选择性合成汽油馏分异构烷烃

采用两段串联固定床反应器，以Co/SiO₂ 作为F-T合成催化剂，以β分子筛负载金属作为加氢裂解/异构化催化剂，研究了从合成气经F-T反应途径一步法选择性合成汽油馏分异构烷烃的反应性能。结果表明，两段固定床系统的F-T合成产物主要为C₁～C₁₀烃，而且异构烷烃的选择性较高（I/C⁺₄≈70%）。同时，钯盐前驱体对0.5%Pd/β的加氢裂解/异构化反应性能有很大影响。保持金属总负载质量分数为0.5%，在Pd/β中引入少量Pt或Ni，可以明显改善催化剂活性和稳定性。

Study on selective synthesis of gasoline-range iso-paraffins from CO + H2 via Fischer-Tropsch route

Selective synthesis of gasoline-range iso-paraffins from synthesis gas (CO+H₂, syngas) via Fischer-Tropsch (F-T) route was investigated in a consecutive dual reactor system, in which F-T reactions took place over Co/SiO₂ catalyst in the upper reactor and hydrocraking/isomerization of the F-T hydrocarbons occurred over metal-supported β zeolite catalyst in the lower reactor. High selectivity to iso-paraffin (I/C⁺₄≈70%) was obtained in the products, mainly C₁-C_{10 }hydrocarbons. Precursors of the palladium salt for the preparation of 0.5% Pd/β had significant effect on behaviors of the catalyst for hydrocracking/isomerization reactions. Catalytic performance of the 0.5% Pd/β catalyst for the titled reaction was obviously improved by substituting a small part of Pd with either Pt or Ni with total metal loadings remaining at 0.5%.