CAJ | 학술논문

以中孔硅胶和微孔HZSM-5分子筛为复合载体,添加Ru制备了钴基催化剂,考察了Ru添加量(1%~4%,质量分数)对催化剂结构和固定床费托合成航空燃油类烃的影响。实验结果表明,制备的复合载体催化剂有一定的微孔和中孔结构,Ru的添加有利于Co分散,Ru促进的催化剂低温还原过程提高了催化剂在150~750℃的还原度和CO转化率,复合载体中HZSM-5分子筛利用其微孔结构,提高了异构烃的收率。当Ru负载量为1%时,CO转化率达到62.8%,航空燃油类烃的收率达到37.7%,包括约10.9%的异构烃。 Ru负载量超过2%时,增强的催化剂CO加氢活性和CH4选择性,导致合成产物向低碳烃方向偏移。
이중공규효화미공HZSM-5분자사위복합재체,첨가Ru제비료고기최화제,고찰료Ru첨가량(1%~4%,질량분수)대최화제결구화고정상비탁합성항공연유류경적영향。실험결과표명,제비적복합재체최화제유일정적미공화중공결구,Ru적첨가유리우Co분산,Ru촉진적최화제저온환원과정제고료최화제재150~750℃적환원도화CO전화솔,복합재체중HZSM-5분자사이용기미공결구,제고료이구경적수솔。당Ru부재량위1%시,CO전화솔체도62.8%,항공연유류경적수솔체도37.7%,포괄약10.9%적이구경。 Ru부재량초과2%시,증강적최화제CO가경활성화CH4선택성,도치합성산물향저탄경방향편이。
Selective synthesis of jet fuel-range hydrocarbons ( C8~18 ) was investigated in a fixed-bed reactor over Ru modified cobalt-based catalysts, supported on mesoporous SiO2 and microporous HZSM-5. The effect of Ru adding amount ( 1% ~4%) and the textual and structural properties of the catalysts on Fischer-Tropsch synthesis ( FTS ) performance were studied. The results showed that the tailor-made Ru-Co/SiO2/HZSM-5 catalysts maintained both meso-and micro-pores. Co dispersion and reducibility at 150~750℃ were enhanced with the increase of Ru amount, which resulted in the increase of CO conversion. In the same time, the yield of iso-paraffins was enhanced due to the existence of microporous structure of HZSM-5 . Thus CO conversion of 62. 8% and yield of jet fuel-range hydrocarbons ( C8~18 ) of 37. 7 %, including 10. 9% of iso-paraffins, were achieved over 1% Ru modified Co/SiO2/HZSM-5. The FTS product distribution shifted to low-carbon hydrocarbons when Ru amount was higher than 2% due to the increased CO hydrogenation rate and CH4 selectivity.