中文摘要：

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.

英文摘要：

Experiments on chemical-looping combustion （CLC） of coal using iron ore as an oxygen carrier were carried out in a laboratory fixed bed reactor at 970 ℃and 0.1-0.6 MPa to study the influence of pressure on CLC characteristics under water vapor atmosphere. Results show that high pressure can speed up the coal gasification, enhance water-gas shift reaction, change the syngas composition, reduce CO concentration and raise the concentration of CO2 and H2. At higher pressures, no H2, less CO and less CH4 are to be found in the reduction flue gas, indicating that pressure rise may help to achieve higher conversion rate of syngas, With the rise of pressure, carbon conversion rate grows first and drops later on, during which a maximum carbon conversion rate exists.