一步法制备生物质活性炭Co基制氢催化剂  

BIOMASS ACTIVATED CARBON BASED Co CATALYST FOR HYDROGEN GENERATION PREPARED BY ONE-STEP METHOD

作　　者：韩敏[1] 曲健林 吴曼[1] 徐秀峰[2] 郭庆杰[1] 

机构地区：[1]青岛科技大学化工学院,清洁化工过程山东省高校重点实验室,青岛266042 [2]烟台大学应用催化研究所,烟台264005

出　　处：《太阳能学报》2016年第10期2668-2674,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(21276129);山东省科技攻关项目(2008GG10006010)

摘　　要：系统考察工艺条件及掺杂Fe、Mn助剂对催化剂催化NaBH_4产氢性能的影响,优化工艺操作参数,以提高催化剂的活性及稳定性。利用扫描电镜仪和X射线衍射仪对催化剂表观形貌及结构进行表征,以探讨催化剂活性的提高机理。结果表明:400℃炭化1 h、800℃活化2 h的工艺条件下,催化剂的催化产氢效果最优,其平均产氢速率为1715.2 mL/(min·g),最高可达2952 mL/(min·g),经循环使用11次后活性仍可保持初始活性的51%。相比于单组份Co-基催化剂,助剂Fe、Mn的引入可有效抑制催化剂活性组分的团聚。一步法工艺制备的Co基催化剂表现出工序简单且良好的催化NaBH_4产氢性能。The effect of process condition and Fe, Mn additives on catalysts used to catalyze NaBH4 for hydrogen production was systematically investigated. The process parameters were optimized to improve the activity and stability of the catalyst. The apparent morphology and structure of catalyst were then characterized using field emission scanning electron microscopy （SEM） and X-ray diffraction （XRD） to study the mechanism how to improve activity of catalyst. The results show that the optimal catalytic performance can be achieved at the condition of carbonizing treatment of 1 h at 400 ℃ and then activation treatment 2 h at 800 ℃. The average hydrogen yield is 1715.2 mL/（min · g） , while the maximum hydrogen yield is 2952 mL/（min, g） at the optimum conditions. The catalytic activity Can still maintain 51% of the initial activity after 11 cycles. Comparing with the single Co based catalyst, the agglomeration phenomenon can be inhibited effectively by introducing Fe and Mn to Co based catalyst. The Co based catalyst prepared by one-step method has good catalytic activity for hydrogen production from NaBH4, the process is simple and efficient.

关 键 词：一步法 玉米秸秆活性炭 Co-基催化剂 硼氢化钠 

分 类 号：TK91[动力工程及工程热物理] TQ426.65[化学工程]