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| 基于钒挥发的重型柴油车V-SCR应用风险 |
| Risk of Vanadium Volatilization of V-SCR Applied in Heavy-Duty Diesel Vehicles |
| 投稿时间：2020-05-07 |
| DOI： |
| 中文关键词: 钒基选择性催化还原剂 五氧化二钒 钒挥发 氨逃逸催化器 重型柴油车排放 |
| 英文关键词:vanadium-based selective catalytic reduction vanadium pentoxide vanadium volatilization ammonia slip catalyst heavy-duty diesel emission |
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| 中文摘要: |
| 针对钒基选择性催化还原剂（Vanadium-Based Selective Catalytic Reduction，V-SCR）可挥发出有毒五氧化二钒（V2O5）气体的特点，对4个不同厂家的V-SCR样品，进行了不同温度和时长下的V2O5挥发速率的测试，对钒挥发的起始条件影响因素、V2O5挥发速率与老化温度、老化时间和老化热当量之间的关系进行了分析，同时考察了氨逃逸催化器（Ammonia Slip Catalyst，ASC）对钒挥发物的吸附拦截效果，分析了由钒挥发问题引发的 V-SCR 应用于重型柴油车（Heavy-Duty Diesel Vehicles，HDDV）的安全可行性。研究结果表明，温度是触发 V-SCR 钒挥发活动开始的最核心因素。 |
| 英文摘要: |
| Since the toxic vanadium pentoxide(V2O5) could be released from the vanadium-based selective catalyst reduction(V-SCR)，the V2O5 volatilization rate of four V-SCR samples from different manufacturers were tested at different temperatures with varying duration. The influential factors of V-SCR volatilization and the relationship between the V 2 O 5 volatilization rate and aging temperature，aging time and heat equivalent were analyzed respectively. Besides，the adsorption ability of ammonia slip catalyst(ASC) for vanadium volatiles was investigated，and the safety issues in V-SCR applications associated with the
vanadium volatilization was analyzed in heavy-duty diesel vehicles (HDDV) during different emission stages.The results show that temperature is the most important factor triggering the vanadium volatilization of V-SCR. |
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