Low Temperature Under Microaerobic Conditions Ash <sub> 3 </ Sub> Gas Adsorption Purification Research

China is the world's major phosphate producer and exporter of phosphate. Enables the comprehensive utilization this important C1 chemistry source of yellow phosphorus tail gas, and the protection environment is the important issue which the sustainable development path faces in our country of phosphorus chemical industry, and also has provided the essential condition for the yellow phosphorus tail gas comprehensive utilization formalization. The yellow phosphorus tail gas include highly concentrated carbon monoxide. The exhaust can not get a better utilization of the most important limiting factor is it include many impurities such as sulfur, phosphorus, arsenic, cyanide and so on), because these impurities have not been purified by technology of mature depth purification, result in it to be unable to use completely for a long time.This thesis aim to research adsorption purification of yellow phosphorus tail gas. The emphases of article is on about adsorption performance of low-concentration hydrogen cyanide and reaction mechanism of modified activated carbon. Firstly, experiments were conducted to select active component of activated carbon adsorbent. secondly, single factor adsorption experiments of Cu(NO3)2/CoPcS modified activated carbon adsorbent was studied. Thirdly, the adsorption samples of virgin activated carbon, virgin activated carbon adsorbed penetrated with AsH3, Cu(NO3)2 modified activated carbon, Cu(NO3)2 modified activated carbon adsorbed penetrated with AsH3, Cu(NO3)2/CoPcS modified activated carbon and Cu(NO3)2/CoPcS modified activated carbon adsorbed penetrated with AsH3 were characterized by N2-BET and SEM-EDS. Finally, reaction mechanism of modified activated carbon adsorbent was inferred by basic experiments and characterization.The results showed that the modified activated carbon impregnated in Cu(NO3)2 with suitable higher concentration can enhance the ability of activated carbon to absorb AsH3. As same as CoPcS.400℃of cremation temperature are optimum conditions for preparing modified activated carbon. Volume space velocity of 2118h-1, oxygen content of 2% and adsorption temperature of 90℃are suitable conditions in adsorbing reaction phase. The specific surface area and pore structure properties of the activated carbon were tested with N2 adsorption. Compared with the virgin activated carbon, the specific surface area and pore volume of the impregnated ones were reduced while the adsorption capacity of AsH3 increased. This indicated that ASH3 reacts with the impregnant on the surface of activated carbon. Moreover, pore size distribution indicated that AsH3 was chemical adsorption at the mesopore or macraporous of modified activated carbon and forming micropore extending, but not micropore filling and covering.Cu(NO3)2/CoPcS modified activated carbon adsorbent adsorbed with AsH3 may happen in the interface of chemisorption. Combining with basic experiments, the adsorption purification mechanism of activated carbon adsorbent were inferred. It indicated that the adsorption capacity of modified activated carbon increased and to achieve the effectiveness of detoxification. AsH3 may be transformed As or As2O3 at the surface of activated carbon.