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Oxy‐fuel co‐combustion performances and kinetics of bituminous coal and ultra‐low volatile carbon‐based fuels
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-09-24 , DOI: 10.1002/er.5871 Chang’an Wang 1 , Qinqin Feng 1 , Qisen Mao 1 , Chaowei Wang 1 , Guangyu Li 2 , Defu Che 1
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-09-24 , DOI: 10.1002/er.5871 Chang’an Wang 1 , Qinqin Feng 1 , Qisen Mao 1 , Chaowei Wang 1 , Guangyu Li 2 , Defu Che 1
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The co‐firing of bituminous coal under oxy‐fuel conditions is a feasible measure to improve the ignition and combustion performances of ultra‐low volatile carbon‐based fuels and effectively control pollutants. The present study aimed at the co‐combustion performances and kinetics of bituminous coal and ultra‐low volatile carbon‐based fuels under oxy‐fuel condition by means of thermogravimetric experiments. The results indicate that the volatile content in fuels is likely to affect the ignition temperature and the oxy‐fuel co‐firing of bituminous coal accelerates the ignition and advances combustion of ultra‐low volatile fuels. The combustion behaviors of individual fuel are retained in the co‐firing process to a large extent, and there is a slight synergy at the 350 to 950°C temperature range. Enhancing the oxygen concentration is effective to improve the combustion performances of ultra‐low volatile fuels in oxy‐fuel atmosphere. The apparent activation energy of residual carbon from coal‐water‐slurry gasification in oxy‐fuel atmosphere exceeds that from fluidized bed gasification, which is highly related to gasification technology and raw fuel properties. The apparent activation energy under condition of co‐firing bituminous coal and residual carbon from coal‐water‐slurry varies considerably, changed from 100 to 46 kJ/mol. Therefore, the addition of bituminous coal significantly reduces the activation energy of ultra‐low volatile fuels to improve the co‐firing performances. Based on the present investigation, a better understanding on the oxy‐fuel co‐firing of various carbon‐based solid fuels is obtained, thereby promoting the efficient and clean utilization of solid waste in the coal chemical industry.
中文翻译：
烟煤和超低挥发性碳基燃料的含氧燃料燃烧性能和动力学
含氧燃料条件下烟煤的共烧是提高超低挥发性碳基燃料着火和燃烧性能并有效控制污染物的可行措施。本研究旨在通过热重实验研究含氧燃料条件下烟煤和超低挥发性碳基燃料的共燃性能和动力学。结果表明，燃料中的挥发性成分可能会影响着火温度，烟煤的含氧燃料共同燃烧会加速着火并促进超低挥发性燃料的燃烧。单个燃料的燃烧行为在混合燃烧过程中得到了很大程度的保留，并且在350至950°C的温度范围内有轻微的协同作用。提高氧气浓度可有效改善超低挥发性燃料在含氧燃料气氛中的燃烧性能。在含氧燃料气氛中，水煤浆气化过程中残余碳的表观活化能超过流化床气化过程中的残余活化能，这与气化技术和原始燃料的特性高度相关。在将烟煤与水煤浆中残留的碳共烧的条件下，表观活化能相差很大，从100 kJ / mol变为46 kJ / mol。因此，添加烟煤会显着降低超低挥发性燃料的活化能，从而改善混燃性能。根据目前的调查，对各种碳基固体燃料的含氧燃料共烧有了更好的了解，
更新日期：2020-09-24
中文翻译：
烟煤和超低挥发性碳基燃料的含氧燃料燃烧性能和动力学
含氧燃料条件下烟煤的共烧是提高超低挥发性碳基燃料着火和燃烧性能并有效控制污染物的可行措施。本研究旨在通过热重实验研究含氧燃料条件下烟煤和超低挥发性碳基燃料的共燃性能和动力学。结果表明，燃料中的挥发性成分可能会影响着火温度，烟煤的含氧燃料共同燃烧会加速着火并促进超低挥发性燃料的燃烧。单个燃料的燃烧行为在混合燃烧过程中得到了很大程度的保留，并且在350至950°C的温度范围内有轻微的协同作用。提高氧气浓度可有效改善超低挥发性燃料在含氧燃料气氛中的燃烧性能。在含氧燃料气氛中，水煤浆气化过程中残余碳的表观活化能超过流化床气化过程中的残余活化能，这与气化技术和原始燃料的特性高度相关。在将烟煤与水煤浆中残留的碳共烧的条件下，表观活化能相差很大，从100 kJ / mol变为46 kJ / mol。因此，添加烟煤会显着降低超低挥发性燃料的活化能，从而改善混燃性能。根据目前的调查，对各种碳基固体燃料的含氧燃料共烧有了更好的了解，
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