Preparation And Furfural Residue Desulfurization Performance Of Activated Carbon-Based Sorbent Of Zinc Ferrite

Since the gasification process based on coal as raw material, it is produced by the gasification gas inevitably contains H2S, COS, CS2, and HCl, HCN, NOx and other components(of which 90% H2S), these components will seriously polluted the environment. From the standpoint of environmental protection, for gas desulfurization purification is required. Furfural residue activated carbon with a cheap and readily available, large surface area, pore characteristics developed to be applied in the field of environmental purification. In this paper, furfural residue as raw material prepared under different conditions furfural residue activated carbon, and the modification of furfural residue prepared activated carbon, and as a load carrier prepared zinc ferrite desulfurization agent, and furfural residue modified activated carbon and desulfurization load after study. The modification of activated carbonand catalyst were characterized and evaluated by BET、SEM、TEM、XRD、 FT-IR、TPRand GC.Firstly, the use of phosphoric acid activation method to furfural residue as raw material, phosphoric acid as an activator were prepared by activated carbon. By orthogonal experiments investigated the effects of the concentration of phosphoric acid, solid-liquid ratio, activation temperature and activation time of activated carbons, obtained the optimal conditions for the preparation of activated carbon furfural residue of 50% phosphoric acid concentration, solid-liquid ratio of 1:3, the activation temperature for 400℃, activation time for 2.5h. Furfural residue on activated carbon were prepared by SEM, BET, FT-IR, XRD characterization, and analysis. Its methylene blue adsorption value 14.7mL/0.1g activated carbon, the yield was 63.27%. Under optimal conditions, furfural residue activated carbon charcoal particles produced irregular shape, pore size distribution, particle surface is smooth, there are a large number of cellular structure; pore size distribution is more concentrated, mainly microporous and mesoporous, macroporous compared less, DFT specific surface area of 3652.6 m2/g, a total pore volume reaches 0.8854cm2/ g, an average pore diameter of about 2.1nm; surface potential alcoholic hydroxyl, phenolic hydroxyl group, an ether group, a carboxyl group, an ester group and other functional groups; no microcrystalline structure almost all of the amorphous state.Secondly, furfural residue modification of the load carrier activated carbon zinc ferrite, increasing surface active center of the active ingredient through the load, increasing the capacity of the activated carbon adsorption of furfural residue desulfurization compounds. Since the preparation method and microscopic properties of different preparation conditions, such as the active ingredient desulfurizing agent grain size, pore size distribution, and the catalyst active component in the dispersion of the different carrier surface etc., thus resulting in catalytic activity appears very different. By orthogonal experiment investigated ZnFe2O4/AC ratio, affecting the quality of ultrasonic power and calcination temperature on the desulfurization performance. The results show that:ZnFe2O4/ AC sorbent mass ratio is the biggest factor affecting the sulfur capacity, followed by calcination temperature and ultrasonic power, ultrasonic time of its minimal impact. The specific surface area of activated carbon residue after load of furfural large, pore distribution, pore size uniformity; prepared by co-precipitation method zinc ferrite-based activated carbon sorbent by ultrasound is feasible, the basic form of zinc ferrite spinel structure; calcination temperature has a very big impact on the size of the zinc ferrite grains.Lastly, furfural residue activated carbon as the carrier, using ultrasonic coprecipitation of iron and zinc activated carbon sorbent rule of law, tolerance for sulfur prepared under different conditions were studied desulfurizer. Zinc and iron mass ratio, ultrasonic and calcination temperature activated carbon sorbent sulfur capacity of great influence.