The demand for V₂O₅-WO₃/TiO₂ catalysts is growing as many countries impose increasingly stricter limits on nitrogen oxide emissions. Unfortunately, after service, the spent V₂O₅-WO₃/TiO₂ catalyst is continuously and considerably discarded. The cost of the catalyst accounts for approximately 30–50% of the total investment in the denitration system. Additionally, the spent catalyst contains significant amounts of valuable metals and some heavy metals. Thus, the regeneration to form a new catalyst or recovery of valuable metals from the spent V₂O₅-WO₃/TiO₂ catalyst has gained widespread attention in recent years, not only for meeting the growing demand for corresponding critical metals/catalysts but also reducing the potential ecological and environmental hazards caused by inappropriate disposal. In this article, a systematic review of the literature was conducted to examine recently developed processes and technologies for recycling the spent V₂O₅-WO₃/TiO₂ catalyst to recover either new catalysts or valuable metals. Moreover, the challenges associated with process optimization for the regeneration to form a new catalyst and the recovery of valuable metals were analyzed. The aim of this article is to provide a guideline on how effective processes and techniques for the spent V₂O₅-WO₃/TiO₂ catalyst recycling can be developed and to motivate further studies in this theme for industrial-scale realization.

随着许多国家对氮氧化物排放量施加越来越严格的限制，对V ₂ O ₅ -WO ₃ / TiO ₂催化剂的需求正在增长。不幸的是，在使用后，用过的V ₂ O ₅ -WO ₃ / TiO ₂催化剂被连续地大量丢弃。催化剂的成本约占脱硝系统总投资的30％至50％。另外，废催化剂包含大量的有价值的金属和一些重金属。因此，再生以形成新的催化剂或从废V ₂ O ₅ -WO ₃ / TiO中回收有价值的金属₂催化剂近年来得到了广泛的关注，不仅是为了满足对相应的关键金属/催化剂不断增长的需求，而且还减少了因不适当处置而造成的潜在生态和环境危害。在本文中，对文献进行了系统的回顾，以检查最近开发的回收废V ₂ O ₅ -WO ₃ / TiO _2的工艺和技术。催化剂以回收新催化剂或贵重金属。此外，分析了与用于再生以形成新催化剂的工艺优化和有价值金属的回收相关的挑战。本文的目的是提供一个指南，指导如何开发有效的V ₂ O ₅ -WO ₃ / TiO ₂催化剂循环利用的有效方法和技术，并以此为主题，推动进一步的研究以实现工业规模。