Research On Catalytic Oxidation Of Manganese Desulfurization Manganese Sulfite

Our country is the largest coal consumer in the world,and coal energy production and consumption currently occupy a major position in the total energy production and consumption.The SO₂ produced by the burning of coal will seriously endanger human health and cause serious damage to the environment.Therefore,the flue gas desulfurization technology came into being,which provides a solution to solve the sulfur dioxide flue gas pollution.Among them,wet desulfurization technology is mainly used,which is widely used in power,coal and other industries with high sulfur dioxide emissions.Among many flue gas desulfurization technologies,manganese desulfurization has attracted the attention of scholars in the industry due to its easy access to raw materials,high desulfurization efficiency,and high recovery value of the product.However,related reports are more about the feasibility of manganese desulfurization process,and the research on the by-product manganese sulfite after manganese desulfurization is relatively rare.Therefore,the development of a highly efficient,stable and selective manganese sulfite catalyst is an important point in the field of manganese desulfurization.In this paper,the solution-gel method is used to prepare supported transition metal catalysts with tetraethylorthosilicate as the original silicon,dodecylamine as the template,and cobalt nitrate as the cobalt source,and the data of the orthogonal experiment and the oxidation experiment rate are compared.The synthesis conditions were optimized to maximize the catalytic oxidation performance of the catalyst to manganese sulfite.The best conditions for obtaining the synthesis catalyst were:cobalt loading of 1.2%,aging time of 24 hours,and calcination at 550 degrees Celsius for 6hours.In addition,characterization and analysis of the synthesized manganese sulfite composite solid-phase catalyst showed that the purity of the homemade manganese sulfite was 97.5%,and the chemical composition was manganese sulfite trihydrate.Using a bubbling device to study the oxidation kinetics of manganese sulfite under catalytic and non-catalytic conditions.The results show that under non-catalytic conditions,the oxidation rate of manganese sulfite has nothing to do with its own concentration,that is,the oxidation reaction is a zero-order reaction to manganese sulfite.Under the condition of adding solid-phase catalyst,the oxidation kinetics experiment under different catalyst concentration,temperature,p H and other factors was studied.The results show that the addition of a solid-phase cobalt-based catalyst can increase the oxidation rate of manganese sulfite up to about 6 times compared with non-catalytic conditions.The reaction order of catalyst concentration is 0.24,the reaction order of oxygen partial pressure is 0.58,and the apparent activation energy is about 10.03 k J·mol-1.In addition,related experiments were carried out on the catalytic enrichment of manganese sulfite.The concentration of manganese sulfate in the non-catalytic oxidation enrichment experiment was increased to about 7%,and the catalytic oxidation enrichment test was increased to about 22%.The addition of catalyst significantly improved the concentration of manganese sulfate.The oxidation rate of manganese sulfate and the concentration of manganese sulfate.This article carried out related research on manganese desulfurization by-product manganese sulfite.Through improving the catalytic efficiency and enriching the oxidation products,it provided relevant theoretical basis for the industrial application and resource utilization of manganese desulfurization,and promoted the further development of manganese desulfurization process.Promotion.