Optimizing the dual-layer Pt/Al 2 O 3 + Cu/SSZ-13 washcoated monolith: Selective oxidation of NH 3 to N 2
作者: Pritpal S. DhillonMichael P. HaroldDi WangAshok KumarSaurabh Y. Joshi
作者单位: 1Dept. of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204-4004, USA
2Corporate Research and Technology, Cummins Inc., 1900 McKinley Av., Columbus, IN 47201, USA
刊名: Catalysis Today, 2020
来源数据库: Elsevier Journal
DOI: 10.1016/j.cattod.2020.01.017
关键词: AmmoniaPlatinumCopperOxidationSelective catalytic reduction
原始语种摘要: Abstract(#br)The state-of-the-art Ammonia Slip Catalyst (ASC) has a dual-layer washcoat architecture with a bottom layer of Pt/Al 2 O 3 and a top layer of Cu/SSZ-13. A trade-off between the NH 3 conversion and N 2 selectivity presents a challenge in the ASC design. While a sufficiently thick and active zeolitic top layer increases the N 2 selectivity, it also imposes a diffusion barrier to the reacting species in reaching the bottom Pt layer, lowering NH 3 conversion. Here we describe a systematic study to identify the ASC architecture and composition that optimizes the trade-off. The in-house synthesized ASC samples span the single layer Pt/Al 2 O 3 , conventional dual-layer Pt/Al 2 O 3 + Cu/SSZ-13, uniform single layer of mixed Pt/Al 2 O 3 + Cu/SSZ-13, and a hybrid design comprising a...
全文获取路径: Elsevier  (合作)
影响因子:2.98 (2012)

  • monolith 单成岩
  • layer 
  • selectivity 选择性
  • loading 加负载
  • catalytic 催化的
  • conversion 转换
  • oxidation 氧化
  • sufficiently 充足地
  • bottom 底壁
  • architecture 构造