La(1-x)SrxNiO3钙钛矿型催化剂的制备及其用于氨催化裂解产氢的研究
Preparation of La(1-x)SrxNiO3 catalyst for ammonia cracking to produce hydrogen
张颢玉 1张振东1
作者信息
- 1. 上海交通大学中英国际低碳学院,上海 201306
- 折叠
摘要
采用凝胶溶胶法制备了 Sr2+掺杂的La(1-x)SrxNiO3(x分别为0、0.2、0.4、0.6、0.8)的钙钛矿型催化剂,Sr2+掺杂可以通过增强催化剂碱性和碱性位点数量、改善催化剂氧化还原行为提升催化剂活性.气相色谱分析结果表明,当x=0.4时,催化剂活性最高,在裂解温度为650℃、NH3流速37 500 mL/(h·g)的100％NH3中,NH3转换率可达100％,较LaNiO3催化作用下的NH3转换率提高了 5.12％.利用Design Expert软件对La0.6Sr0.4NiO3进行合成条件优化发现,在煅烧温度为700℃、煅烧时间为3.39 h、柠檬酸与硝酸盐的物质的量的比为1.2时催化剂催化活性最高,600℃下NH3转换率达到95.548％.
Abstract
A gel-sol method was used to prepare Sr2+-doped La(1-x)Srx NiO3(x=0,0.2,0.4,0.6,0.8)perovskite catalyst.It was found that Sr2+doping can improve the catalyst activity by enhancing the basicity and the number of basic sites of the catalyst and improving the redox behavior of the catalyst.Gas chromatography analysis showed that when x=0.4,the catalyst activity is the highest.At the cracking temperature of 650℃ and NH3 flow rate of 37 500 mL/(h·g),the NH3 conversion rate can reach 100％,which is 5.12％higher than the NH3 conversion rate using LaNiO3 as catalyst.Design Expert software was used to optimize the synthesis conditions of La0.6Sr0 4NiO3,and it was found that the catalyst had the highest catalytic activity(95.548％at 600℃)when the calcination temperature was 700℃ and calcination time of 3.39 h,while the mass ratio of citric acid to nitrate was 1.2.
关键词
钙钛矿型催化剂/氨裂解制氢/Sr掺杂Key words
perovskite catalyst/ammonia cracking to produce hydrogen/Sr doping引用本文复制引用
基金项目
上海市科委"科技创新行动计划"国际科技合作项目(23160712400)
出版年
2024
NETL
NSTL
万方数据