当前位置: X-MOL 学术Appl. Catal. A Gen. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Exfoliated graphite as a heat-conductive frame for a new pelletized Fischer–Tropsch synthesis catalyst
Applied Catalysis A: General ( IF 5.5 ) Pub Date : 2020-05-17 , DOI: 10.1016/j.apcata.2020.117639
Ekaterina Asalieva , Lilia Sineva , Svetlana Sinichkina , Igor Solomonik , Kirill Gryaznov , Ekaterina Pushina , Ekaterina Kulchakovskaya , Andrei Gorshkov , Boris Kulnitskiy , Danila Ovsyannikov , Sergey Zholudev , Vladimir Mordkovich

The introduction of exfoliated graphite into pelletized Co-based catalysts affects in the most positive way both catalytic and physico-chemical properties. Unlike other carbons, the exfoliated graphite allows combination of extended surface with high thermal conductivity. An open-ended system of slit-type pores is revealed by X-ray tomography. Electron microscopy shows graphitic platelets forming an all-penetrating heat-conductive frame. Element distribution analysis shows that this catalyst cannot be considered as a cobalt-on-carbon catalyst since the graphitic component carries insignificant amount of cobalt and serves as a heat-conductive frame only. Thermal conductivity of a catalyst with graphite frame is 2 times higher than that of its industrial predecessor with Al metal frame and 30 times higher than that of a catalyst without heat-conductive additive. Testing in exothermal Fischer–Tropsch synthesis shows a favorable influence of the graphitic additive, i.e. such catalyst shows productivity of 455 g/kg/h at GHSV of 3000 h−1.



中文翻译:

片状石墨作为新型造粒费托合成催化剂的导热框架

将片状石墨引入粒状钴基催化剂中会以最积极的方式影响催化性能和物理化学性能。与其他碳不同,片状石墨可将扩展的表面与高导热率结合在一起。X射线断层扫描显示狭缝型孔的开放式系统。电子显微镜显示石墨薄片形成了一个全穿透的导热框架。元素分布分析表明,该催化剂不能被认为是碳载钴催化剂,因为石墨组分携带的钴量不大,仅用作导热框架。具有石墨框架的催化剂的热导率是其工业上的具有铝金属框架的催化剂的热导率的2倍,并且是没有导热添加剂的催化剂的热导率的30倍。放热费-托合成中的测试显示出石墨添加剂的有利影响,即在GHSV为3000 h时,这种催化剂的生产率为455 g / kg / h-1

更新日期:2020-05-17
down
wechat
bug