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| Coupling effect of Fe-based catalyst on coal pyrolysis-combustion NOx control |
| YANG Song1,2, KONG Xiang-lu2,3, WANG Qi2,3, LI Jiang-peng2,3, JIAO Ting-ting2,3, ZHANG Kai-xia2,3, LIU Shou-jun1,2,3, SHANG Guan-Ju2,3 |
1. College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, China;
2. Shanxi Civil Clean Fuel Engineering Research Center, Taiyuan 030024, China;
3. State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China |
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Abstract In order to solve the problem of NOx emission in civil loose-burning raw coal, a source control strategy of "pyrolysis to reduce nitrogen and couple combustion to denitrate" was put forward to realize pollutant emission. The additive was introduced into raw coal in one step to control NOx emission in the process of pyrolysis and combustion. The specific research contents were as follows:coal and iron additive were pyrolyzed in a tube furnace to prepare clean fuel, The emission of NOx during clean fuel combustion was studied. The influence of iron additives on nitrogen migration and the influence of surface structure and pore structure of clean coke were systematically investigated. The results showed that iron additives loaded before pyrolysis existed stably in coke and promoted the transformation of nitrogen-containing compounds into N2 during pyrolysis. In the combustion process of clean coke, the existence of iron additives is beneficial to the catalytic reduction of NOx by C and CO, and then the emission of NOx in the combustion process is controlled. The iron additives introduced in one step play a coupling effect of NOx control in the coal pyrolysis-combustion process, realizing the ultra-low emission of NOx.
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Received: 16 December 2021
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