发明授权
- 专利标题: Elemental sulfur recovery process
- 专利标题(中): 元素硫回收过程
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申请号: US791491申请日: 1991-11-12
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公开(公告)号: US5242673A公开(公告)日: 1993-09-07
- 发明人: Maria Flytzani-Stephanopoulos , Zhicheng Hu
- 申请人: Maria Flytzani-Stephanopoulos , Zhicheng Hu
- 申请人地址: MA Cambridge
- 专利权人: Massachusetts Institute of Technology
- 当前专利权人: Massachusetts Institute of Technology
- 当前专利权人地址: MA Cambridge
- 主分类号: B01D53/86
- IPC分类号: B01D53/86 ; B01J23/10 ; C01B17/04
摘要:
An improved catalytic reduction process for the direct recovery of elemental sulfur from various SO.sub.2 -containing industrial gas streams. The catalytic process provides combined high activity and selectivity for the reduction of SO.sub.2 to elemental sulfur product with carbon monoxide or other reducing gases. The reaction of sulfur dioxide and reducing gas takes place over certain catalyst formulations based on cerium oxide. The process is a single-stage, catalytic sulfur recovery process in conjunction with regenerators, such as those used in dry, regenerative flue gas desulfurization or other processes, involving direct reduction of the SO.sub.2 in the regenerator off gas stream to elemental sulfur in the presence of a catalyst.