加氢脱硫废金属催化剂回收生产过程生命周期评价

基于生命周期评价法(LCA)评价加氢脱硫废金属催化剂回收生产过程的环境影响,将回收生产过程分为6个阶段,选取了12种关键环境影响类型,通过建立物质投入及排放清单,基于eBalance软件进行建模和计算。结果表明:回收1 t废催化剂的总环境影响为1.11E-08,其中,全球变暖效应潜值(GWP)是废催化剂回收生产过程中最大的环境影响贡献类型。焙烧阶段的环境影响贡献最大,其次为提取钴镍阶段、浓缩蒸发阶段、提取钼钒阶段,预处理阶段、运输阶段的环境影响贡献很小。基于生命周期评价法提出能源替代方案,清洁能源替代方案的环境影响为4.98E-09,较回收工艺环境影响削减了55.16%的环境影响。

LIFE CYCLE ASSESSMENT OF HYDRODESULFURIZATION WASTE METAL CATALYST RECOVERY PROCESS

This paper evaluates the environmental impact of the recycling production process of hydrogen desulfurization waste metal catalyst, based on the life cycle assessment(LCA), divides the whole recycling production process into six stages, selects 12 key environmental impact types, establishes material input and emission list, and conducts the model building and calculation based on eBalance software. The results showed that the total environmental impact of recovering 1 ton of spent catalyst is 1.11E-08, and the potential value of the GWP(potential value of the global warming effect) is the largest environmental impact contribution type in the process of recovering spent catalyst. The environmental impact contribution of the roasting stage is the largest, followed by the cobalt nickel extraction stage, concentration evaporation stage and then molybdenum vanadium extraction stage, while the environmental impact contribution of the pretreatment stage and transportation stage is very small. The energy alternative is proposed based on the life cycle evaluation analysis, and the environmental impact of the clean energy alternatives is 4.98E-09, reduced by 55.16% from the environmental impact of recycling process.