Influence of Impregnation Processes on Ruthenium-Molybdenum Carbon Catalysts for Selective Hydrodeoxygenation of Biomass-Derived Sorbitol into Renewable Alkanes
Influence of Impregnation Processes on Ruthenium-Molybdenum Carbon Catalysts for Selective Hydrodeoxygenation of Biomass-Derived Sorbitol into Renewable Alkanes
复制标题
浸渍工艺对生物质山梨醇选择性加氢脱氧成可再生烷烃的钌-钼碳催化剂的影响
DOI：
10.1002/ente.201700885
复制
发表时间：
2018
影响因子：
3.8
通讯作者：
Ma Longlong
中科院分区：
文献类型：
--
作者：
Weng Yujing;Wang Tiejun;Duan Peigao;Wang Chenguang;Wang Feng;Liu Qiying;Chen Lungang;Wang Haiyong;Liang Zheng;Ma Longlong
山梨醇作为一种从纤维素中提取的C6糖相关化合物，被认为是一种很有前途的生物质衍生底物，其氧含量高于化石资源。本文采用不同浸渍工艺制备了钌钼碳催化剂，并在滴流床反应器中对山梨醇加氢脱氧（HDO）进行了广泛研究。有趣的是，这些催化剂提供了显著不同的HDO性能。经超声处理和煅烧制备的钌钼催化剂在山梨醇转化过程中具有较高的HDO性能，C5/C6烷烃（戊烷和己烷）的碳收率为79.8%，几乎是未采用煅烧工艺制备的钌钼催化剂的两倍。为此，对相关催化剂进行了一系列表征研究（N2‐吸附、XRD、HRTEM、XPS、H2‐TPR、CO‐TPD、NH3‐TPD、Py‐IR等），以研究催化机理。结果表明，预先煅烧为Ru和Mo前驱体之间的接近提供了更好的机会，从而产生双金属催化结构Ru - moox，从而获得较高的HDO性能。
Sorbitol, as a C6 sugar related compound derived from cellulose, is regarded as a promising biomass‐derived substrate and has characteristically higher oxygen content than in fossil‐based resources. In this work, ruthenium–molybdenum carbon catalysts prepared by different impregnation processes were employed and extensively studied in a trickle‐bed reactor for sorbitol hydrodeoxygenation (HDO). Interestingly, these catalysts afforded remarkably different HDO performance. Ruthenium–molybdenum catalysts prepared by ultrasonic treatment and calcination obtained high HDO performance in sorbitol conversion with 79.8 % carbon yield of C5/C6 alkanes (pentane and hexane), almost twice that of ruthenium–molybdenum catalysts prepared without using a calcination processes. Therefore, a series of characterization studies (N2‐adsorption, XRD, HRTEM, XPS, H2‐TPR, CO‐TPD, NH3‐TPD, Py‐IR spectra, etc.) were performed over relevant catalysts to study the catalytic mechanism. The results suggest that prior calcination offers a better chance for the proximity between Ru and Mo precursors to produce the bimetallic catalytic structure Ru–MoOx, which produces high HDO performance.