添加剂对长焰煤与高硫焦煤共热解焦炭反应性及硫转化的影响,ACS Omega

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添加剂对长焰煤与高硫焦煤共热解焦炭反应性及硫转化的影响
ACS Omega ( IF 3.7 ) Pub Date : 2021-12-08 , DOI: 10.1021/acsomega.1c05642
Wenguang Li _{1,

2} , Yanfeng Shen _{1,

2} , Jiang Guo _{1,

2} , Jiao Kong _{1,

2} , Meijun Wang _{1,

2} , Liping Chang _{1,

2}

Affiliation

选择一种硅铝基矿物 (GL) 来检查混合煤中矿物的相互作用对长焰煤和高硫焦煤共热解过程中焦炭反应指数 (CRI) 和硫转化的影响。结果表明，对于活性氢的供应、硫的分解和反应性的调节具有良好的相容性。不同混煤焦中硫含量的实验值均低于计算值，这可以确定是长焰煤对硫转化的定向调节作用的结果。在混煤中加入GL显着降低了相应焦炭的CRI，并且GL对焦炭反应性的影响也通过10公斤焦炉实验得到验证。当增加长焰煤的配比时，固相固硫有被碱性矿物增强的趋势。此外，GL在减少碱性矿物对硫自由基的捕获方面发挥作用，从而提高了混煤热解过程中的硫去除率，从而降低了焦炭中的硫含量。该工作为利用硅铝基矿物减少硫的捕获和对焦炭反应性的催化作用提供了参考。

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Effects of Additives on Coke Reactivity and Sulfur Transformation during Co-pyrolysis of Long Flame Coal and High-Sulfur Coking Coal

A silica-aluminum-based mineral (GL) was selected for inspecting the effects of interactions of minerals in coal blends on the coke reactivity index (CRI) and sulfur transformation during co-pyrolysis of long flame coal and high-sulfur coking coal. Results indicate a good compatibility for the supply of active hydrogen, decomposition of sulfur, and regulation of reactivity. The experimental values of sulfur content in different coal blend cokes are lower than the calculated values, which can be determined as a result of the directional regulation effect of long flame coal on sulfur transformation. The addition of GL in coal blends significantly reduces the CRI of the corresponding coke, and the effect of GL on coke reactivity is also verified by a 10 kg coke oven experiment. When increasing the ratio of long flame coal, the sulfur fixation in the solid phase has a tendency to be enhanced by alkaline minerals. Also, GL plays a role in reducing the capture of sulfur free radicals by alkaline minerals, which improves the sulfur removal during pyrolysis of coal blends and then reduces the sulfur content in coke. This work provides a reference for using silica-aluminum-based minerals to reduce the capture of sulfur and catalytic effect on coke reactivity.

更新日期：2021-12-21

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