Thermoanalysis was used in this research to produce a comparative study on the combustion and gasification characteristics of semi-coke prepared under pyrolytic atmospheres rich in CH 4 and H 2 at different proportions. Distinctions of different semi-coke in terms of carbon chemical structure, functional groups, and micropore structure were examined. The results indicated that adding some reducing gases during pyrolysis could inhibit semi-coke reactivity, the inhibitory effect of the composite gas of H 2 and CH 4 was the most observable, and the effect of H 2 was higher than that of CH 4 ; moreover, increasing the proportion of reducing gas increased its inhibitory effect. X-ray diffractometer and Fourier-transform infrared spectrometer results indicated that adding reducing gases in the atmosphere elevated the disordering degree of carbon microcrystalline structures, boosted the removal of hydroxyl- and oxygen-containing functional groups, decreased the unsaturated side chains, and improved condensation degree of macromolecular networks. The nitrogen adsorption experiment revealed that the types of pore structure of semi-coke are mainly micropore and mesopore, and the influence of pyrolytic atmosphere on micropores was not of strong regularity but could inhibit mesopore development. Aromatic lamellar stack height of semi-coke, specific surface area of mesopore, and pore volume had a favorable linear correlation with semi-coke reactivity indexes.

中文翻译：

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富含CH4和H2的气氛制备的低温热解半焦的燃烧和气化特性

本研究利用热分析对在不同比例的富含CH 4和H 2的热解气氛下制备的半焦的燃烧和气化特性进行了比较研究。检查了不同半焦在碳化学结构，官能团和微孔结构方面的区别。结果表明，在热解过程中加入一些还原性气体可以抑制半焦反应性，H 2和CH 4复合气的抑制作用最为明显，H 2的作用高于CH 4。此外，增加还原性气体的比例增加了其抑制作用。X射线衍射仪和傅里叶变换红外光谱仪的结果表明，在大气中添加还原性气体提高了碳微晶结构的无序度，促进了含羟基和含氧官能团的去除，减少了不饱和侧链，并改善了缩合高分子网络的程度。氮吸附实验表明，半焦的孔结构主要为微孔和中孔，热解气氛对微孔的影响不是很规则，但可以抑制中孔的发展。半焦的芳香层状堆积高度，中孔的比表面积和孔体积与半焦反应性指数具有良好的线性相关性。促进了羟基和含氧官能团的去除，减少了不饱和侧链，并改善了大分子网络的缩合度。氮吸附实验表明，半焦的孔结构主要为微孔和中孔，热解气氛对微孔的影响不是很规则，但可以抑制中孔的发展。半焦的芳香层状堆积高度，中孔的比表面积和孔体积与半焦反应性指数具有良好的线性相关性。促进了羟基和含氧官能团的去除，减少了不饱和侧链，并改善了大分子网络的缩合度。氮吸附实验表明，半焦的孔结构主要为微孔和中孔，热解气氛对微孔的影响不是很规则，但可以抑制中孔的发展。半焦的芳香层状堆积高度，中孔的比表面积和孔体积与半焦反应性指数具有良好的线性相关性。热解气氛对微孔的影响不是很规则，但可以抑制中孔的发展。半焦的芳香层状堆积高度，中孔的比表面积和孔体积与半焦反应性指数具有良好的线性相关性。热解气氛对微孔的影响不是很规则，但可以抑制中孔的发展。半焦的芳香层状堆积高度，中孔的比表面积和孔体积与半焦反应性指数具有良好的线性相关性。