Removal of P_4, PH_3 and H_2S from Yellow Phosphoric Tail Gas by a Catalytic Oxidation Process  

作　　者：NingPing Hans-JoergBart MaLiping WangXueqian 

机构地区：[1]DepartmentofEnvironmentalScienceandEngineering,KunmingUniversityofScienceandTechnology,Kunming650093 [2]LehrstuhlfürThermischeVerfahrenstechnik,UniversityKaiserslautern,D-67653Kaiserslautern,Germany

出　　处：《工程科学（英文版）》2004年第4期20-27,共8页Engineering Sciences

基　　金："8 63"HighTechnologyPlanningGrant (No .2 0 0 4AA64 90 40 ) ;NationalNaturalScienceFund (No .5 3 0 0 2 3 45 ) ;NaturalScienceFundofYunnanProvince (No .2 0 0 2E0 0 0 9Q )

摘　　要：Yellow phosphorus tail gas is a resource used to produce bulk chemicals, such as formates, oxalates, and methanol after its pretreatment and purification. In this study, catalytic oxidation of phosphorus and hydrogen sulfide in yellow phosphorus tail gas was investigated on an ordinary activated carbon (OAC) and a home made catalyst KU2. The adsorption characteristics of phosphorus and hydrogen sulfide on the catalysts were studied in a fixed-bed system at different temperatures between 20℃ and 140℃ at atmospheric pressure. Both KU2 and OAC are proved to be effective catalysts in the catalytic oxidation process (COP) for H 2S and PH 3 removal. Purification efficiency increased with the increase of temperature and oxygen concentration in yellow phosphorus tail gases. Under optimized operation conditions, the product gases with a content of hydrogen sulfide<5 mg/m 3 and total phosphorus<5 mg/m 3 were obtained by using the COP process. Deactivated catalysts could be restored to the original activated state, even after several regenerations. A mathematical model was developed to simulate the experimental results and the mass transport coefficient from the experiment was evaluated. Good agreement between the experimental breakthrough curves and the model predictions was observed.Yellow phosphorus tail gas is a resource used to produce bulk chemicals, such as formates, oxalates, and methanol after its pretreatment and purification. In this study, catalytic oxidation of phosphorus and hydrogen sulfide in yellow phosphorus tail gas was investigated on an ordinary activated carbon (OAC) and a home made catalyst KU2. The adsorption characteristics of phosphorus and hydrogen sulfide on the catalysts were studied in a fixed-bed system at different temperatures between 20℃ and 140℃ at atmospheric pressure. Both KU2 and OAC are proved to be effective catalysts in the catalytic oxidation process (COP) for H 2S and PH 3 removal. Purification efficiency increased with the increase of temperature and oxygen concentration in yellow phosphorus tail gases. Under optimized operation conditions, the product gases with a content of hydrogen sulfide<5 mg/m 3 and total phosphorus<5 mg/m 3 were obtained by using the COP process. Deactivated catalysts could be restored to the original activated state, even after several regenerations. A mathematical model was developed to simulate the experimental results and the mass transport coefficient from the experiment was evaluated. Good agreement between the experimental breakthrough curves and the model predictions was observed.

关 键 词：P4 PH3 H2S 催化氧化 固定床吸附器 活性碳 黄磷废气 

分 类 号：TQ126.317[化学工程—无机化工]