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中文摘要：
温和热解是一种煤燃烧前有效的脱硫方法和提质手段。该文在前期研究的基础上，进一步研究了2种贵州省高硫煤在不同气氛温和热解过程中煤中含硫气体的释放行为及机制。研究表明，根据温和热解过程中的释放温度由低至高可把煤中硫分为3类：不稳定有机硫、黄铁矿硫和稳定的有机硫。微氧化性的热解气氛可有效提高温和热解的脱硫效率，特别有利于对黄铁矿硫的脱除。研究还表明，不同的氧化性气氛对于煤中C—S键和c—C键的断裂具有选择性，综合脱硫效率和热值损失分析，发现4％O2-N2的微氧化性气氛下，400℃的热解温度为最佳的燃烧前温和热解脱硫条件。
英文摘要：
Mild thermal upgrading before coal utilization is an efficient method for sulfur removal as well as the quality upgrading. Two coal samples with high sulfur content from Guizhou province were selected to investigate the releasing mechanism of different forms of sulfur under different atmospheres during mild thermal upgrading. The study shows that sulfur in coal can be divided into three types： unstable organic sulfur, pyrite sulfur and stable organic sulfur. Small amount of oxygen in the carrier gas can significantly improve the release amount of SO2 in coal especially for the pyrite sulfur. The breaking of C-C and C-S bonds during thermal upgrading is observed to have different selectivity for different oxygen contents. The study indicates that 4% O2-N2 low oxidizing atmosphere and 400℃is the optimal working condition for mild thermal upgrading before combustion.
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