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In situ high-temperature regeneration of CrCe/β-zeolite catalysts for toluene catalytic combustion 认领 引用
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作者 Zetao Jin Zhuo Wang +2 位作者 Hanqi Ning Shufeng Zuo Jing Li 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第8期2376-2384,I0004,共9页
This study reports the development of a CrCe/β-zeolite catalyst exhibiting outstanding thermal stability and systematically examined its deactivation under sulfur poisoning during toluene catalytic combustion,as well... This study reports the development of a CrCe/β-zeolite catalyst exhibiting outstanding thermal stability and systematically examined its deactivation under sulfur poisoning during toluene catalytic combustion,as well as the mechanism of in situ high-temperature regeneration.Instead of the conventional SO2-gas-based poisoning method,quantitative sulfur poisoning is achieved via thermal decomposition of ammonium sulfate in situ.Sulfur poisoning markedly diminishes the catalytic activity,whereas in situ high-temperature regeneration progressively restores its performance.The incorporation of CeO2 suppresses structural collapse and active-site agglomeration under thermal stress,acting simultaneously as a sacrificial agent and structural stabilizer,and thus preserves high catalytic activity even after multiple poisoning-regeneration cycles.The proposed in situ high-temperature regeneration strategy offers a straightforward and effective approach for restoring sulfur-poisoned catalysts and promises significant practical applicability. 展开更多
关键词 Cr/β-zeolite Sulfur poisoning CeO2 modification In situ high-temperature regeneration Catalytic activity restoration Rare earths
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