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首页> 外文期刊>Energy & Environment >Effect of complexing agents on desulphurization and deashing of coal by H_2O_2/H_2SO_4 leaching
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Effect of complexing agents on desulphurization and deashing of coal by H_2O_2/H_2SO_4 leaching

机译：络合剂对H_2O_2 / H_2SO_4浸出脱硫除灰的影响

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摘要

The present study was aimed at investigating the effect of the addition of complexing agents on the removal efficiency of sulphur and ash contents during chemical leaching by acidified hydrogen peroxide. Representative coal sample from Lakhra was subjected to chemical leaching under various conditions of the parameters including time (60 and 120 min), temperature (25 and 50 degrees C), complexing agents (citric acid and phosphoric acid) and the concentration of complexing agents (100 and 1000 ppm). The addition of complexing agents, i.e. citric acid and phosphoric acid imparted significant effects on improving the removal efficiency of sulphur and ash contents. Under optimized conditions, it was found out that the addition of citric acid improved the removal efficiency for sulphur from 63.88 to 83.47% and from 33.12 to 66.25% for ash. In case of phosphoric acid, the removal in sulphur and ash contents was increased from 63.77 to 80.77% and from 33.12 to 59.18%, respectively. Apparently, citric acid happened to be the most effective complexing agent, as compared to phosphoric acid. These results warrant subsequent detailed studies for further optimization of the process, including the use of some other complexing agents, as well.
机译：本研究旨在研究在酸化过氧化氢化学浸出过程中添加络合剂对硫和灰分含量去除效率的影响。来自Lakhra的代表性煤样品在各种条件下进行化学浸出，包括时间（60和120分钟），温度（25和50摄氏度），络合剂（柠檬酸和磷酸）和络合剂浓度（ 100和1000 ppm）。加入络合剂，即柠檬酸和磷酸对提高硫和灰分含量的去除效率具有显著作用。在最佳条件下，发现柠檬酸的添加将硫的去除效率从63.88提高到83.47％，将灰分从33.12提高到66.25％。在使用磷酸的情况下，硫和灰分的去除率分别从63.77增加到80.77％，从33.12增加到59.18％。显然，与磷酸相比，柠檬酸是最有效的络合剂。这些结果需要进行后续的详细研究，以进一步优化流程，包括使用其他一些络合剂。

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