Naddour Carole, Rieu Mathilde, Boreave Antoinette, Gil Sonia, Vernoux Philippe, Viricelle Jean-Paul
Mines Saint-Etienne, Univ Lyon, CNRS, UMR 5307 LGF, Centre SPIN, F-42023 Saint-Etienne, France.
Univ Lyon, Université Lyon 1, CNRS, UMR 5256, IRCELYON, 2 avenue Albert Einstein, F-69622 Villeurbanne, France.
Sensors (Basel). 2023 Sep 30;23(19):8186. doi: 10.3390/s23198186.
Electrochemical NOx sensors based on yttria-stabilized zirconia (YSZ) provide a reliable onboard way to control NOx emissions from glass-melting furnaces. The main limitation is the poisoning of this sensor by sulfur oxides (SOx) contained in the stream. To overcome this drawback, an "SO trap" with high SOx storage capacity and low affinity to NOx is required. Two CuO/BaO/SBA-15 traps with the same CuO loading (6.5 wt.%) and different BaO loadings (5 and 24.5 wt.%, respectively) were synthetized, thoroughly characterized and evaluated as SO traps. The results show that the 6.5%CuO/5%BaO/SBA-15 trap displays the highest SO adsorption capacity and can fully adsorb SO for a specific period of time, while additionally displaying a very low NO adsorption capacity. A suitable quantity of this material located upstream of the sensor could provide total protection of the NOx sensor against sulfur poisoning in glass-furnace exhausts.
基于氧化钇稳定氧化锆（YSZ）的电化学氮氧化物传感器为控制玻璃熔炉的氮氧化物排放提供了一种可靠的车载方法。主要限制是该传感器会被气流中所含的硫氧化物（SOx）中毒。为克服这一缺点，需要一种具有高SOx存储容量且对NOx亲和力低的“SO捕集器”。合成了两种具有相同CuO负载量（6.5 wt.%）和不同BaO负载量（分别为5 wt.%和24.5 wt.%）的CuO/BaO/SBA-15捕集器，对其进行了全面表征并作为SO捕集器进行了评估。结果表明，6.5%CuO/5%BaO/SBA-15捕集器具有最高的SO吸附容量，能在特定时间段内完全吸附SO，同时对NO的吸附容量也非常低。在传感器上游放置适量的这种材料可以为氮氧化物传感器提供全面保护，使其免受玻璃熔炉废气中的硫中毒影响。
