基于响应面法Pt-Li2O-Al2O3催化甘油水蒸气重整制氢工艺优化
Optimization of glycerol steam reforming for hydrogen over Pt-Li2O-Al2O3 catalyst based on response surface method
万鑫雅 1刘思乐 1赵诗曼 1郭思源1
作者信息
- 1. 沈阳科技学院化学与化工系,辽宁沈阳 110167
- 折叠
摘要
采用等体积分步浸渍法制备Pt-Li2O-Al2O3催化剂,以甘油为原料,氢产率为评价指标,运用响应面法的Box-Behnken设计对甘油水蒸气重整制氢工艺进行优化.采用SEM、BET等手段对Pt-Li2O-Al2O3催化剂物相、比表面积进行表征,同时采用相机对催化剂使用前后的积碳情况进行观察、分析.结果表明,t=632 ℃、n(水)∶n(甘油)=26、甘油液空速为0.17 h-1,氢产率为5.445、5.428,与模型预测的氢产率5.390比较接近.Pt-Li2O/Al2O3催化剂表面比较粗糙,呈疏松、多孔状的结构,有较大的平均孔半径和总孔容积,具有良好的抗积碳性能.
Abstract
Pt-Li2O-Al2O3 catalyst was prepared by equal volume step impregnation method,the process of glycerol steam reforming for hydrogen production was optimized by Box-Behnken design of response surface method with glycerol as raw material and hydrogen production rate as the evaluation index.The phase and specific surface area of Pt-Li2O-Al2O3 catalyst were characterized by SEM and BET,and the carbon deposition before and after the use of the catalyst was observed and analyzed by camera.The results showed that when the reaction temperature was 632 ℃,the water ratio to alcohol was 26.The space velocity of glycerol was 0.17 h-1,the hydrogen yield was 5.445,5.428,which was close to the predicted hydrogen yield was 5.390.Pt-Li2O/Al2O3 catalyst has grough surface,porous structure,large average pore radius,and total pore volume.It has good carbon resistance.
关键词
响应面法/甘油/制氢Key words
Response surface method/Glycerol/Hydrogen production引用本文复制引用
基金项目
国家级大学生创新训练项目(2023213621002)
沈阳科技学院创新创业孵化扶持项目(2023)()
出版年
2024
NETL
NSTL
万方数据