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在反应温度为970℃、压力范围为0.1~0.6 MPa的条件下,以铁矿石为载氧体,采用固定床反应器,对煤化学链燃烧进行了试验研究,考察了加压对燃料反应器内水蒸气气氛下煤化学链燃烧的反应特性.结果表明:加压能加快煤水蒸气气化速率,加强水气转换反应,并对煤气组分产生影响,使CO浓度降低,CO2和H2浓度升高;加压后还原反应烟气中不再含有H2,CO和CH4的浓度也变得很低,说明加压可提高还原反应中煤气的转化率;随着压力的升高,碳转化率先升高后又降低,存在着一个中间压力值,使碳转化率最高.
Under the condition of reaction temperature of 970 ℃ and pressure range of 0.1 ~ 0.6 MPa, iron ore was used as the oxygen carrier, and the fixed bed reactor was used to study the chemical chain combustion of coal. The effects of pressure on the reaction of fuel The results show that the pressurization can accelerate the rate of steam gasification, enhance the gas-water conversion reaction and affect the gas composition, so as to reduce the concentration of CO and CO2 and H2 The concentration of H 2 SO 4 decreased and the concentration of H 2 O increased after the pressure reduction. The concentration of CO and CH 4 in the flue gas was no longer increased after the pressurization, which indicated that the pressure increased the conversion of gas in the reduction reaction. With the increase of pressure, After the first increase and then decrease, there is an intermediate pressure value, so that the highest carbon conversion rate.