Peitz D, Bernhard A, Elsener M, Kröcher O
Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
Rev Sci Instrum. 2011 Aug;82(8):084101. doi: 10.1063/1.3617463.
A test reactor was designed and built for investigating liquid reducing agents in the selective catalytic reduction (SCR) process in the laboratory. The design of the experimental setup is described in detail and its performance was evaluated. Using a glass nebulizer, liquid reducing agents were sprayed directly onto a catalyst positioned in a heated glass reactor with a length of 250 mm and an internal diameter of 20.4 mm or 40 mm. Model exhaust gases were mixed from individual gas components and were heated up to 450 °C in a heat exchanger before entering the reactor. The off-gas was analyzed using two complimentary techniques, a multi-component online FTIR gas analysis and a liquid quench gas absorption setup, to detect higher molecular compounds and aerosols. Due to the versatility of construction, processes not related to SCR, but involving three-phase reactions with gases, liquids and a catalyst, can also be investigated.
设计并建造了一个试验反应堆，用于在实验室中研究选择性催化还原（SCR）过程中的液体还原剂。详细描述了实验装置的设计，并对其性能进行了评估。使用玻璃雾化器，将液体还原剂直接喷到放置在加热玻璃反应器中的催化剂上，该反应器长度为250毫米，内径为20.4毫米或40毫米。模拟废气由各种气体成分混合而成，在进入反应器之前，先在热交换器中加热到450°C。使用两种互补技术对废气进行分析，即多组分在线傅里叶变换红外气体分析和液体骤冷气体吸收装置，以检测高分子化合物和气溶胶。由于该装置的通用性，还可以研究与SCR无关，但涉及气体、液体和催化剂的三相反应的过程。
