The Study On The Absorption Of Hydrogen Sulfide By Polyferric Sulphate-Copper Sulfate

With the rapid development of industry as well as the improvement of people’s livingstandards, the environmental pollution problems have become increasingly serious and havecaused people’s attentions nowadays.Among them, the malodorous gas pollution has becomeone of the pollutions that affect the quality of social life; the emission of malodorous gas inthe productionprocessespecially causes serious threat to human health. In recent years, therehas been an increasing demand to control odor pollution in the whole society, which haspromotedboth domestic and foreign application technology to dispose odor pollutants.Therehave been some newly-developed technologiessuch as ozone treatment, plasma treatment andphotocatalyst degradation, etc. These methods have both advantages and disadvantages inactual practices and therefore cannot be popularized or implementedwithin a certainamount oftime.The first part of the paper is a detailed exposition of the malodorous gas.With theintegration of information and the actual local situation, this paper explains and analyzes theconcept, features, causes and current situation of malodorous gases. The paper focuses on theresearches and analysis of a typical malodorous gas–hydrogen sulfide-andintroducescomprehensively its chemical properties, source, hazards, detection methods andtreatment method. This paper has a complete theoretical system and also gives a briefintroduction of the mechanism, operation process and feasibility of a new type of liquidabsorbent material that will be discussed later in this paper.The latter part of the paper studies the absorption treatment of PFS-CuSO4absorbinghydrogen sulfide gas. A preliminary experiment is conducted to remove hydrogen sulfideusing self-made experimental devices. Experimental results show that at room temperature(20℃) and atmospheric pressure, using PFS and CuSO4as raw materials and certain amountof H2O2as absorbent, and with hydrogen sulfide’s initial concentrationof about34mg/m3, it ismost effective to remove hydrogen sulfidewith a H2O2and copper ion molar ratio of4:1rather than2:1or no H2O2at all. When to remove90%of the hydrogen sulfide under eachcondition, it is most durable and effective to use a H2O2and copper ion molar ratio of4:1. When using ZnSO4and FeCl3instead of CuSO4, thereby producing a mixed adsorbentmaterial of PFS-ZnSO4and PFS-FeCl3, the mixed adsorption material also has goodadsorbent and removal capacityto remove hydrogen sulfide, only slightly less effectively thandoes the PFS-CuSO4. Finally, after being compared to other solid adsorbent material,activated carbon and5A-molecular sieve, PFS-CuSO4is proved to have better adsorptionproperties to remove hydrogen sulfide both durably and effectively.The absorbent that the paper discusses has a wide source of raw materials. PFS hasaffordable prices and a small amount can be able to absorb mass of hydrogen sulfide gas;therefore it has considerable economic value as well as a base to achieve large-scaleproduction. With certain improvement and adequate consideration towards the specificallocation of the solvent, the absorbent can be put into production for hydrogen sulfidegasdisposal.