Peraration Of Zinc Oxide/Modified Semi-coke For Medium Hot Coal Gas Desulfurizer Under Microwave

For a long time，China’s energy structure determines the status of coalwill not change. The government energy development strategy has beenproposed to accelerate the coal clean development and utilization, meanwhileimprove coal utilization levels. In the many application of coal cleantechnology, gas purification and separation technology are the core technology,especially H2S removal in coal gas. At present, the removal of H2S gas fromcoal gas is mainly based on coarse desulfurization, less on the finedesulfurization, there are many difficulties in the field.Therefore，to discovernew teehnique and teehnologies of hot coal gas desulfurizer，especially to thematerials with microwave adsorption ability, has great meaning to promoteenergy conservation, speed up our country zinc oxide desulfurizer Produetivityand the teehnical level enhancement.In this paper, aiming at zinc oxide desulfurizer with microwave adsorption,the microwave calcinations by the active component ZnO, carrier modifiedsemi-coke, additive CeO2and binder purple soil is realized, The changing rulesof the materials with microwave adsorption in microwave field are explored；the calcinations techniques are designed for optimization by the utilization of RSM. The new teehniques and key parameters of microwave calcinations ofzinc oxide desulfurizer are obtained.1、The absorption of the modified semi-coke in microwave field is thestrongest, which belongs to the strong absorbing material；purple soil in thefield of microwave absorbing properties is middle level；The absorption of zincoxide precursor in the microwave field is the weakest；As long as the mixedwith a certain amount of modified semi-coke, the mixture exhibited a hightemperature rise rate；The phenomenon of thermal runaway in microwave fieldof desulfurization.2、Single factor analysis is used in the study, effect of breakthrough timeand sulfur capacity about microwave power、calcination temperature、calcinationtime、content of active component is discussed：The optimal microwave power、The optimal calcination temperature and time、The optimal content of activecomponent is1300W，550℃，60min，30%, respectively.3、The design of RSM is used in the study，calcination temperature andtime、content of active component had a remarkable effect on the breakthroughtime of the sorbent，and between each factor is notably；The optimumtechnique parameters to prepare for zinc oxide desulfurizer by microwavecalcination are microwave power、calcination temperature and time、content ofactive component is1300W，550℃，60min，30%, respectively.4、The sorbents were characterized which were prepared using differentmethod of microwave heating and conventional heating, XRD patterns indicated that the peak intensities derived from ZnO with complete crystalshape；Comparison of fractal dimension of the desulfurization prepared frommicrowave and conventional preparation, Microwave system of preparingdesulfurizer is more rough, have more three-dimensional pore structure, andmore micro pore formation, there is conducive to the desulfurizer sulfidationand for regeneration of desulfurizer is also very beneficial；The XPS patternsdemonstrated that binding energy of Zn2p and O1s were lower, which isfavorable for the adsorption of H2S gas.