摘要
VOCs大多具有毒性,并伴有刺激性的恶臭,直接排放会威胁人类健康,并对环境造成严重污染。目前,催化燃烧技术是工艺较为成熟,同时也是应用较为广泛的VOCs的净化方法。实际过程使用的催化燃烧催化剂多为具有规整结构的蜂窝状催化剂,活性组分通常为Pt、Pd、Ru等贵金属。从整体式催化剂的角度出发,制备了Al_2O_3和TiO_2两种涂层的整体式催化剂用于催化燃烧消除苯的实验,未添加铈锆粉时的活性顺序:Pt/Al_2O_3/堇青石<Pt/TiO_2/堇青石;添加铈锆粉后的活性顺序:Pt/CZ-Al_2O_3/堇青石>Pt/CZ-TiO_2/堇青石,同时铈锆粉的添加还可以提高催化剂的热稳定性。
Most VOCs are toxic, accompanied by pungent odor; their direct emission will threaten human health and cause serious environmental pollution. Currently, the catalytic combustion technology is more mature technology, and also is widely used in the purification process of VOCs. Most catalytic combustion catalysts have regular honeycomb structure; the typical active ingredients are Pt, Pd, Ru and other precious metals. Monolithic catalysts Al_2O_3 and TiO_2 with coatings were prepared for the catalytic combustion experiments to eliminate benzene. The order activity of catalysts without cerium-zirconium powder is as follows： Pt / Al_2O_3 / cordierite Pt / TiO_2 / cordierite; the order activity of catalysts with cerium-zirconium powder is as follows： Pt / CZ-Al_2O_3 / cordierite Pt / CZ-TiO2 / cordierite, while adding cerium zirconium powder can also improve the thermal stability of the catalysts.
出处
《当代化工》
CAS
2016年第4期720-723,共4页
Contemporary Chemical Industry
关键词
挥发性有机物
催化燃烧
贵金属
整体式催化剂
Volatile organic compounds
Catalytic combustion
Precious metals
Monolithic catalyst
