以氢氧化钠改性粉煤灰(FA)得到衍生沸石为载体,采用直接沉淀法制备反应的终点pH为10的脱硫剂。采用扫描电镜、X射线衍射、氮气吸附-脱附、红外吸收光谱仪、固体紫外漫反射等表征手段考察了其脱硫性能。结果表明:FA衍生沸石作为载体负载铁并添加一定比例的铜,制备的脱硫剂比表面积增加,孔体积以及孔隙率增大,铁氧化物分散性提高,有效地提高脱硫剂的脱硫性能,最大硫容可达到281.3mg/g。
Fly ash (FA) was modified by sodium hydroxide to obtain derivative zeolite which was used as carrier,and the Fe-Cu/NFA desulfurizer,the end point of the reaction at pH=10,was prepared by using direct precipitation method.Using SEM,XRD,BET,FT-IR,DR UV-Vis and other characterization methods,the desulfurization performance was investigated at room temperature.The results showed that derivative zeolite was used as a carrier to support iron oxide and added a certain proportion of copper,the pore volume,porosities,and dispersibility of the prepared desulfurizer were increased,which effectively improveed the desulfurization performance of the desulfurizer.The sulfur capacity could reach 281.3mg/g.
[1] Gollakota A R,Volli V,Shu C M.Progressive utilisation prospects of coal fly ash:a review[J].Science of the Total Environment,2019,672(3):951-989.
[2] Blissett R S,Rowson N A.A review of the multi-component utilisation of coal flyash[J].Fuel,2012,97(3):1-23.
[3] Franus M,Wdowin M,Bandura L,et al.Removal of environmental pollution using zeolites from fly ash:a review[J].Fresenius Environ Bull,2015,24(14):854-866.
[4] Tanaka H,Eguchi H,Fujimoto S,et al.Two-step process for synthesis of a single phase NaeA zeolite from coal fly ash by dialysis[J].Fuel,2006,85(10):1329-1338.
[5] Claudia B,Elisabetta A,Sandra B,et al.Synthesis of magnetic zeolite at low temperature using a waste material mixtu:fly ash and red mud[J].Microporous and Mesoporous Materials,2015,202(9):208-216.
[6] Wang D J,Zhang Y H,Dong A G,et al.Conversion of fly ash cenosphere to hollowmicrospheres with zeolite/mullite composite shells[J.Advanced Functional Materials,2003,13(7):563-567.
[7] Hosseini T,Girolamo A D,Zhang L.Energy evaluation and techno-economic analysis of low-rank coal(victorian brown coal) utilization for the production of multi-products in a drying-pyrolysis process[J].Energy Fuels,2018,32(3):3211-3224.
[8] Marion G,Michel S,Philippe C,et al.Conversion of coal fly ashes into faujasite under soft temperature and pressure conditions[J].Influence of additional silica,2010,127(12):41-49.
[9] Ojumu T V,Du P P,Petrik L F,et al.Synthesis of zeolite A from coal fly ash using ultrasonic treatment a replacement for fusion step[J].Ultrason Sonochem,2016,31(1):342-349.
[10] Yang B,Ma S,Cui R,et al.Simultaneous removal of NOx and SO2 with H2O2 catalyzed by alkali/magnetism-modified fly ash:high efficiency,low cost and catalytic mechanism[J].Chemical Engineering Journal,2019,359(1):236-237.
[11] Hua N W,Yu Z,Song W B,et al.H2S adsorption by municipal solid waste incineration (MSWI) fly ash with heavy metals immobilization[J].Chemosphere,2018,198(12):40-47.
[12] Murayama N,Yamamoto H,Shibata J.Zeolite synthesis from coal fly ash by hydrothermal reaction using various alkali sources[J].Chem Technol Biotechnol,2002,77(3):280-286.
[13] Sakthivel T,Reid D L,Goldstein I,et al.Hydrophobic high surface area zeolites derived from fly ash for oil spill remediation[J].Journal of Magnetism and Magnetic Materials,2013,47(10):5843-5850.
[14] Hong Z Z,Jun H L,Gang X D,et al.H2S removal:correlation between performance and loading species of Zn-Fe/attapulgite[J].Environmental Progress & Sustainable Energy,2014,33(2):378-384.
[15] Sakthivel T,Reid D L,Goldstein I,et al.Hydrophobic high surface area zeolites derived from fly ash for oil spill remediation[J].Journal of Magnetism and Magnetic Materials,2013,47(10):5843-5850.
[16] Li Z T,Liu D M,Cai Y D,et al.Adsorption pore structure and its fractal characteristics of coals by N2 adsorption/desorption and FESEM image analyses[J].Fuel,2019,257(12):1-13.
[17] Zhai M,Guo L,Sun L,et al.Desulfurization performance of fly ash and CaCO3 compound absorbent[J].Powder Technology,2017,305(10):553-561.
[18] Battisha I K,Afify H H,Ibrahim M.Synthesis of Fe2O3 concentrations and sintering temperature on FTIR and magnetic susceptibility measured from 4 to 300K of monolith silica gel prepared by sol-gel technique[J].Journal of Magnetism & Magnetic Materials,2006,306(2):211-217.
[19] Cecilia J A,Soriano M D,Correia L M,et al.Fe2O3 supported on hollow micro/mesospheres silica for the catalytic partial oxidation of H2S to sulfur[J].Fuel,2020,294(9):1-17.
[20] Li S,Wu P,Li H,et al.Synthesis and characterization of organo-montmorillonite supported iron nanoparticles[J].Applied Clay Science,2010,50(3):330-336.
[21] Gurgul J,LŽtka K,Hnat I,et al.Identification of iron species in FeSiBEA by DR UV-Vis,XPS and Mössbauer spectroscopy:influence of Fe content[J].Microporous and Mesoporous Materials,2013,168(9):1-6.
[22] Dzwiga J S,Stievano L,Wagner F E,et al.Effect of preparation and metal content on the introduction of Fe in BEA zeolite,studied by DR UV-Vis,EPR and Mössbauer spectroscopy[J].Journal of Physics and Chemistry of Solids,2007,68(10):1885-1891.
[23] Li S,Wu P,Li H,et al.Synthesis and characterization of organo-montmorillonite supported iron nanoparticles[J].Applied Clay Science,2010,50(3):330-336.
基金资助
江苏省产学研前瞻项目(BY2014037-10)
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