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首页> 外文期刊>Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems >Recent progress in Japan on hot gas cleanup of hydrogen chloride,hydrogen sulfide and ammonia in coal-derived fuel gas
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Recent progress in Japan on hot gas cleanup of hydrogen chloride,hydrogen sulfide and ammonia in coal-derived fuel gas

机译：日本在煤制燃气中热气净化氯化氢，硫化氢和氨气方面的最新进展

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The present review paper highlights on the recent progress in Japan on the hot gas cleanup of HCl,H2S and NH3 in raw fuel gas for coal-based,combined cycle power generation technologies.It has been shown that NaAlO2,prepared by mixing Na2CO3 solution with Al2O3 sol,can reduce HCI in an air-blown gasification gas from the initial 200 ppm to <1 ppm at 400 °C,and it is tolerable for 200 ppm H2S.With regard to the removal of H2S,studies on the stability and durability of ZnFe2O4 sorbent in a simulated fuel gas have indicated the presence of an optimal operation temperature from the viewpoint of the suppression of both vaporization of metallic Zn and carbon formation from CO.High-performance TiO2-supported ZnFe2O4,which can decrease 1000 ppm H2S to <1 ppm at 450 °C and 1 MPa,has been developed by the homogeneous precipitation method using a mixture of SiO2 sol and an aqueous solution of Zn and Fe nitrates,followed by mixing with TiO2.Although this sorbent is regenerable and durable,the sorption ability should be improved in a syngas-rich fuel gas from an O2-blown gasifier.A novel method to prepare carbon-supported ZnFe2O4 and CaFe2O4 by impregnating the corresponding nitrate solution with brown coal has been proposed,and the large desulfurization capacity of almost 100% has been achieved in the removal of 4000 ppm H2S around 450 °C.The present authors have demonstrated that an Australian limonite rich in alpha-FeOOH is practically feasible as the catalyst material for the decomposition of 2000 ppm NH3 in a syngas-rich gas of 25 vol.% H2/50 vol.% CO at 750 deg C,because small amounts of H2O and CO2 added to the gas can work efficiently for inhibiting carbon deposition from the CO.
机译：本文综述了日本在以煤为基础的联合循环发电技术中对原料燃料气中的HCl，H2S和NH3进行热气净化的最新进展。研究表明，NaAlO2是通过将Na2CO3溶液与Al2O3溶胶可以在400°C下将气吹气化气体中的HCl从最初的200 ppm降低到<1 ppm，并且可以耐受200 ppm的H2S。关于去除H2S的稳定性和耐久性的研究从抑制金属锌的汽化和CO形成碳的角度来看，模拟燃料气体中ZnFe2O4吸附剂的存在表明存在最佳操作温度。高性能TiO2负载的ZnFe2O4可以将1000 ppm的H2S减少至在450°C和1 MPa下，均质沉淀法采用SiO2溶胶与硝酸锌和硝酸铁的水溶液混合均匀沉淀，随后与TiO2混合，开发出了<1 ppm的吸附剂。 rp提出了一种新的方法，该方法通过用褐煤浸渍相应的硝酸盐溶液来制备碳载ZnFe2O4和CaFe2O4的新方法，并且脱硫能力几乎达到了在约450°C的温度下去除4000 ppm的H2S已实现100％的分离。本论文的作者证明，富含α-FeO​​OH的澳大利亚褐铁矿作为在富含合成气的水中分解2000 ppm NH3的催化剂材料是切实可行的在750摄氏度时，含25％（体积）H2 / 50％（体积）CO的气体，因为向气体中添加少量的H2O和CO2可以有效地抑制碳从CO中的沉积。

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