燃料化学学报（中英文）2025，Vol.53Issue(5)：693-702,中插4-中插8,15.DOI:10.1016/S1872-5813(24)60518-9
La对Ni/Al2O3催化剂氨分解制氢反应的助催化作用
Promoting effect of La additive on the Ni/Al2O3 catalyst in the catalytic decomposition of ammonia
李涵 1高典楠 2王胜 3汪明哲 3王树东3
作者信息
- 1. 大连工业大学轻工与化学工程学院,辽宁 大连 116034||中国科学院大连化学物理研究所能源催化转化全国重点实验室,辽宁 大连 116023
- 2. 大连工业大学轻工与化学工程学院,辽宁 大连 116034
- 3. 中国科学院大连化学物理研究所能源催化转化全国重点实验室,辽宁 大连 116023
- 折叠
摘要
Abstract
The calcination conditions of Al2O3 support and active Ni component in the Ni/Al2O3 catalyst for the ammonia decomposition were optimized;on the basis of that,the promoting effect of La additive on the Ni/Al2O3 catalyst in the catalytic decomposition of ammonia was investigated.The results indicate that under 550℃and a WHSV of 36000 mL/(g·h),the ammonia conversion over 10%Ni/5La-Al2O3 with a La loading of 5%reaches 83.2%.The ammonia conversion achieves 92.2%at 524℃when the content of La is further increased to 15%and the catalytic activity of 10%Ni/15La-Al2O3 displays no obvious decline within 100 h.Combining with the XRD,XPS,TEM and H2-TPR results,the superior performance of La-promoted Ni/Al2O3 catalyst in the ammonia decomposition is ascribed to that the addition of La can improve the reductive properties of Ni,enrich the surface oxygen defect and nickel content,increase the adsorption sites of NH3 molecules and stabilize the Al-based support structure.These results should be conducive to the understanding of the co-catalytic effect of rare earth element La and the development of efficient Ni-based ammonia decomposition catalysts.关键词
镍基催化剂/La助剂/氨分解/产氢Key words
nickel-based catalyst/La promoter/ammonia decomposition/hydrogen production分类
化学化工引用本文复制引用
李涵,高典楠,王胜,汪明哲,王树东..La对Ni/Al2O3催化剂氨分解制氢反应的助催化作用[J].燃料化学学报（中英文）,2025,53(5):693-702,中插4-中插8,15.
