Khabra Alon, Pinhasi Gad A, Zidki Tomer
Department of Chemical Sciences, Ariel University, P.O. Box 3, Ariel 40700, Israel.
Department of Chemical Engineering, Ariel University, P.O. Box 3, Ariel 40700, Israel.
ACS Omega. 2021 Jan 21;6(4):2570-2575. doi: 10.1021/acsomega.0c04485. eCollection 2021 Feb 2.
Nitrogen (NO ) and sulfur (SO ) oxides, the major gaseous pollutants emitted from fossil fuel combustion, have significant health and environmental concerns. Environmental regulations limit these pollutant emissions to tolerable levels. Currently, these pollutants are treated by flue gas desulfurization (SO removal) and selective catalytic reduction (NO removal) processes. However, these technologies require large footprints, use expensive catalysts, and operate under high working temperatures. A new catalyst is reported herein, based on sulfur-enriched oil emulsified with water, where the active catalytic species are sulfur-based oxides. The catalyst has been developed using O as the oxidation reagent in a low-temperature wet scrubber rather than HO or O that are presently used. The catalytically oxidized pollutants are converted to produce ammonium fertilizers by NHOH addition. As a result of treatment with this novel catalyst, we observed reductions in emissions of SO and NO of >85% and 23%, respectively. The catalyst production and the wet scrubbing process are discussed in detail.
氮氧化物（NO ）和硫氧化物（SO ）是化石燃料燃烧排放的主要气态污染物，对健康和环境有着重大影响。环境法规将这些污染物的排放限制在可容忍水平。目前，这些污染物通过烟气脱硫（SO 去除）和选择性催化还原（NO 去除）工艺进行处理。然而，这些技术占地面积大，使用昂贵的催化剂，且在高温下运行。本文报道了一种基于富硫油与水乳化的新型催化剂，其中活性催化物种是硫基氧化物。该催化剂是在低温湿式洗涤器中使用O作为氧化试剂开发的，而不是目前使用的HO或O。通过添加NHOH将催化氧化的污染物转化为铵肥。使用这种新型催化剂处理后，我们观察到SO 和NO 的排放量分别减少了>85%和23%。详细讨论了催化剂的生产和湿式洗涤过程。
