摘要
考察了椰壳炭、HSAG(一种商品石墨)载体对钴基催化剂CO加氢制高碳醇转化率和选择性的影响。采用N2物理吸附、EDS、H2-TPR、In-situ XRD等技术对催化剂进行表征。研究结果表明,硝酸处理过的椰壳活性炭为载体的15Co/AC催化剂的醇选择性高(19.9%),而CO转化率低(25.4%);HSAG为载体并经硝酸处理后制备的15Co/HSAG催化剂的CO转化率高(87.3%),而醇的选择性低(4.5%)。造成两者差别的主要原因两种载体性质不同,椰壳活性炭表面的S含量高,其负载的催化剂较易形成醇的活性中心Co2C,而HSAG负载的催化剂较难形成醇的活性中心。
The effects of Co-based catalysts supported on different carbons, coconut shell activated carbon and HSAG （a commercial graphite）, on conversion and selectivity in synthesis of mixed higher alcohols from syngas were investigated. and the catalysts were characterized by N2 physical adsorption, EDS, H2-TPR and In-situ XRD. The results showed that the catalyst 15Co/AC prepared by using the coconut shell activated carbon treated by nitric acid as support had low activity （25.4%） and high ROH selectivity （19.9%）, and the catalyst 15Co/HSAG prepared by using the HSAG treated by nitric acid as support had high activity （87.3%） and low ROH selectivity （4.5%）, which was attributed mainly to the different properties of the two supports. The coconut shell activated carbon had higher content of S on its surface, which resulted in the catalyst being much easier to form the active center Co2C for alcohol synthesis, while the HASG-supported catalyst was difficult to generate the same active centers.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2014年第5期7-11,共5页
Natural Gas Chemical Industry
关键词
活性炭
石墨
钴催化剂
碳化钴
费托合成
混合醇
activated carbon
graphite
cobalt catalyst
cobalt carbide
Fischer-Tropsch synthesis
mixed higher alcohols
