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首页> 外文期刊>International journal of green energy >Gasification of Inferior Coal with High Ash Content under CO2 and O-2/H2O Atmospheres
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Gasification of Inferior Coal with High Ash Content under CO2 and O-2/H2O Atmospheres

机译：在CO2和O-2 / H2O气氛下高灰分劣质煤的气化

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The gasification reaction of Nantong inferior coal was investigated in a laboratory fixed-bed reactor under CO2 and O-2/H2O atmospheres. The effects of the bed temperature and inlet-gas concentration on the yields of CO, H-2, and CH4 were studied. The effects of coal ash and particle size on the fixed-carbon conversion were also investigated, and kinetic analysis was conducted with a homogeneous model. The product-gas-heating value and fixed-carbon conversion increased when the temperature was increased from 950 degrees C to 1100 degrees C under CO2 atmosphere. When the inlet-CO2 concentration was increased from 50 to 100 vol.%, the low heating value of the product gas and carbon conversion ratio slightly increased. During the gasification of inferior coal under the O-2/H2O atmosphere, the CO concentration increased rapidly with increasing temperature. The H-2 and CH4 concentrations increased initially and then decreased. The maximum gas heating value of 7934 kJ/m(3) was obtained under the O-2 concentration of 70 vol.% at a bed temperature of 1050 degrees C. The cold-gas efficiency increased with increasing temperature and became 40.6% and 86.4% at 1100 degrees C under the CO2 and O-2/H2O atmospheres, respectively. The gasification reaction of the Nantong inferior coal strongly depended on the content of inherent inorganic matter. The gasification rates for both the CO2 and O-2/H2O atmospheres were independent of the particle size. The activation energy for the CO2 and O-2/H2O gasification reactions were 137 and 81 kJ/mol, respectively. The gasification reactions of the Nantong coal, which was performed under two different atmospheres, were compared and the reaction activity of the gasification reaction under CO2 atmosphere was found to be much lower than that under the O-2/H2O atmosphere.
机译：在CO2和O-2 / H2O气氛下，在实验室固定床反应器中对南通劣质煤的气化反应进行了研究。研究了床温和进气浓度对CO，H-2和CH4收率的影响。还研究了煤灰和粒径对固定碳转化率的影响，并用均质模型进行了动力学分析。当温度在二氧化碳气氛下从950摄氏度增加到1100摄氏度时，产品气体的热值和固定碳转化率增加。当入口CO 2浓度从50体积％增加到100体积％时，产物气的低发热量和碳转化率略有增加。在O-2 / H2O气氛下劣质煤的气化过程中，CO浓度随温度升高而迅速增加。 H-2和CH4浓度先升高然后降低。在1050℃的床温度下，在70％（体积）的O-2浓度下，最大气体热值为7934 kJ / m（3）。冷气效率随着温度的升高而升高，分别达到40.6％和86.4。分别在1100摄氏度和CO-2和O-2 / H2O气氛下达到％。南通劣质煤的气化反应强烈依赖于固有无机物的含量。 CO2和O-2 / H2O气氛的气化速率均与粒径无关。 CO2和O-2 / H2O气化反应的活化能分别为137和81 kJ / mol。比较了在两种不同气氛下进行的南通煤的气化反应，发现在CO2气氛下气化反应的反应活性远低于O-2 / H2O气氛下的气化反应活性。

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