硅锰合金尾气生物发酵制燃料乙醇脱硫工艺研究

Study on Desulfurization Technology of Fuel Ethanol by Biological Fermentation of Siliconmanganese Alloy Tail Gas

利用硅锰合金尾气(一氧化碳、二氧化碳和H2等)生物发酵制燃料乙醇是近年兴起并高速发展的新型技术,该技术利用硅锰合金冶炼产出富含一氧化碳、二氧化碳及氢气的尾气为原料,采用气体生物发酵、蒸馏脱水等工艺,产品为燃料乙醇。对比于以粮食为原料生产燃料乙醇技术,以硅锰合金尾气为原料生产燃料乙醇技术,含硫化合物在原料气中有一定量存在,这为燃料乙醇产品中总硫控制增加了难度。经技术摸索,采用原料气羰基硫脱除与燃料乙醇产品催化脱硫有机结合可有效解决燃料乙醇产品中总硫过高的技术难题,更有效降低使用燃料乙醇车辆尾气中SO2的排放,从而提升了硅锰合金尾气生物发酵制燃料乙醇商业化推广和产业化应用价值。

The use of silicomanganese alloy tail gas(carbon monoxide, carbon dioxide and H2, etc.) biological fermentation to fuel ethanol is a new technology that has emerged and developed rapidly in recent years, which uses silicomanganese alloy smelting to produce tail gas rich in carbon monoxide, carbon dioxide and H2 as raw material, and uses gas biological fermentation, distillation and dehydration processes, and the product is fuel ethanol. In contrast to the technology of producing fuel ethanol with grain as raw material and the technology of producing fuel ethanol with the silicomanum alloy tail gas of as raw material, there is a certain amount of sulfur-containing compounds in the raw gas, which increases the difficulty of controlling the total sulfur in fuel ethanol products. Through technical exploration, the organic combination of raw gas carbonyl sulfur removal and catalytic desulfurization of fuel ethanol products can effectively solve the technical problem of excessive total sulfur in fuel ethanol products, and more effectively reduce the emission of SO2 in the exhaust gas of vehicles using fuel ethanol. Therefore, the commercial promotion and industrial application value of fuel ethanol produced by biological fermentation of silicomanganese alloy tail gas have been enhanced.