Abstract

The effect of the type of the cobalt-containing component (Со-Al₂O₃/SiO₂, Co-Re/Al₂O₃, and Co-Re/TiO₂) of a composite catalyst on the combined synthesis and hydroconversion of hydrocarbons by the Fischer–Tropsch process are investigated. The catalytic properties of catalyst samples are studied in a flow reactor with a fixed catalyst layer at 2 MPa and GHSV of 1000 h^–1 within a the temperature range of 240–280°С for 40–90 h of continuous operation. The highest values of output and selectivity to C₅₊ hydrocarbons are obtained for composite catalyst Со-Al₂O₃/SiO₂(35%)/ZSM-5(30%)/Al₂O₃(30%) at a temperature of 240°C and are 106 kg/(\({\text{m}}_{{{\text{cat}}}}^{3}\) h) and 67.1%, respectively. It is shown that using Co-Re/Al₂O₃ instead of Со-Al₂O₃/SiO₂ catalyst produces comparable values of catalytic activity, but considerably fewer unsaturated hydrocarbons are found in the products of synthesis. Using Co-Re/TiO₂ catalyst and raising the temperature (to 280°С) shifts the molecular weight distribution of the products of synthesis toward the formation of a gasoline fraction. It is found that the rate of catalyst deactivation grows in the order Со-Al₂O₃/SiO₂ > Co-Re/Al₂O₃ > Co-Re/TiO₂.

中文翻译：

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复合催化剂中含钴组分的类型对СО和Н2一步合成液态烃的影响

摘要

含钴成分的种类的效果（Со-Al系₂ ö ₃ /的SiO ₂，钴-铼/ Al的₂ ö ₃和Co-Re的/二氧化钛₂所组合的合成和加氢转化的复合催化剂的）费-托法研究了碳氢化合物。在具有2 MPa的固定催化剂层和GHSV为1000 h ^–1的流动反应器中，在240–280°С的温度范围内连续运行40–90 h时，研究了催化剂样品的催化性能。输出和选择性C的最高值₅₊为复合催化剂Со-A1中获得的烃₂ ö ₃ /二氧化硅₂（35％）/ ZSM-5（30％）/ Al ₂ O ₃（30％）在240°C的温度下为106 kg /（\（{\ text {m}} _ {{{\ text { cat}}}} ^ {3} \） h）和67.1％。结果表明，以Co-Re的/ Al的₂ ö ₃代替Со-Al系₂ ö ₃ /二氧化硅₂催化剂产生的催化活性的比较的值，但相当少的不饱和烃在合成的产品中发现。使用Co-Re / TiO ₂催化剂并提高温度（至280°С）会使合成产物的分子量分布向汽油馏分的方向转移。据发现，催化剂的失活速率生长在顺序Со-Al系₂O ₃ / SiO ₂ > Co-Re / Al ₂ O ₃ > Co-Re / TiO ₂。