摘要
采用喷雾成型工艺制备了用于循环流化床丁烷脱氢制丁烯的2种微球催化剂(负载金属成型、铝球负载),并进行了催化活性评价,考察了铝溶胶黏结剂的加入量(以Al_(2)O_(3)质量分数计)对铝球负载微球催化剂相关性能的影响,以及优化配方工艺下制得该催化剂的再生性能。结果表明:铝球负载微球催化剂的综合催化性能较好,丁烯收率高达64.1%;铝溶胶含量是铝球负载微球催化剂制备过程的关键因素,必须平衡控制铝溶胶加入量为0~3.0%及优化制备工艺,才能保证铝球负载微球催化剂的孔容、磨损指数、粒径分布中的中位粒径(D50)满足循环流化床使用的相应指标要求;积炭后的铝球负载微球催化剂的10次再生循环使用性能良好,丁烯选择性可持续维持在94.0%左右,再生后的每个反应过程均能高效稳定运行50 min,丁烯收率保持在61.0%~62.0%。
Two kinds of microsphere catalysts(metal-supported and aluminum-supported)for butane dehydrogenation to butene in circulating fluidized bed were prepared by spray molding process and their catalytic activity was evaluated.Then the influence of aluminum sol addition amount(measured by Al_(2)O_(3) mass fraction)on the related properties of aluminum-supported microsphere catalysts and the regeneration performance of the catalyst prepared by the optimal formulation process were investigated.The results showed that the comprehensive catalytic performance of the microspheres supported by aluminum balls was good,and the yield of butene was up to 64.1%.The content of aluminum sol was the key factor in the preparation process of aluminum sphere-supported microsphere catalyst.It was necessary to balance the addition of aluminum sol binder at 0-3.0%and optimize the preparation process to ensure that the pore volume,the median diameter(D50)of particle size distribution and the wear index of aluminum sphere-supported microsphere catalyst meet the corresponding index requirements for the use of circulating fluidized bed.After carbon accumulation,the aluminum sphere-supported microsphere catalyst had good performance in 10 times recycling cycles,and the selectivity of butene could be sustainably maintained at about 94.0%.After regeneration,each reaction process could run efficiently and stably for 50 min,and the yield of butene could be kept at 61.0%-62.0%.
作者
董炳利
杨利斌
卜婷婷
翟莉慧
DONG Bing-li;YANG Li-bin;BU Ting-ting;ZHAI Li-hui(Lanzhou Petrochemical Research Center,Petrochemical Research Institute,PetroChina,Lanzhou 730060,China)
出处
《石化技术与应用》
CAS
2024年第6期414-417,共4页
Petrochemical Technology & Application
基金
中国石油天然气集团公司科技研发计划资助项目(项目编号:2013 B-2608)。
关键词
丁烷脱氢制丁烯
微球催化剂
喷雾成型
铝溶胶
循环流化床
催化活性
再生性能
butane dehydrogenation to butene
microsphere catalyst
spray molding
aluminium sol
circulating fluidized bed
catalytic activity
regeneration performance
