CAJ | 학술논문

以锡盟褐煤和玉米秸秆为原料，利用固定床程序升温热解的方法制备了褐煤焦、生物质焦以及褐煤和生物质不同混合比例的共热解焦样，并进行了孔结构和化学结构的表征以及其灰成分分析。采用等温热重法在450℃下考察褐煤焦和生物质焦的混合样与其相同比例的共热解焦样的氧化活性，对比分析共热解过程对焦样反应活性的影响。实验结果表明，共热解过程中的二次反应对焦样结构有着明显的影响，进一步导致其反应活性下降。尤其是生物质添加量低于50%时，由于共热解过程生物质中大量挥发分的释放增强了其与半焦的二次反应，促使新生焦中部分小于五环的有机结构向更大的结构转化。但生物质添加量大于50%时，生物质焦的反应活性起主导作用，焦样中碱金属和碱土金属催化作用较明显，特别是钾的影响，使得共热解过程中挥发分与半焦的二次反应对其结构及反应性的影响减弱。
이석맹갈매화옥미갈간위원료，이용고정상정서승온열해적방법제비료갈매초、생물질초이급갈매화생물질불동혼합비례적공열해초양，병진행료공결구화화학결구적표정이급기회성분분석。채용등온열중법재450℃하고찰갈매초화생물질초적혼합양여기상동비례적공열해초양적양화활성，대비분석공열해과정대초양반응활성적영향。실험결과표명，공열해과정중적이차반응대초양결구유착명현적영향，진일보도치기반응활성하강。우기시생물질첨가량저우50%시，유우공열해과정생물질중대량휘발분적석방증강료기여반초적이차반응，촉사신생초중부분소우오배적유궤결구향경대적결구전화。단생물질첨가량대우50%시，생물질초적반응활성기주도작용，초양중감금속화감토금속최화작용교명현，특별시갑적영향，사득공열해과정중휘발분여반초적이차반응대기결구급반응성적영향감약。
Ximeng lignite and cornstalk were used as the feedstock to prepare lignite char, biomass char and co-pyrolysis char with different blending ratios in a fixed bed reactor with temperature-programmed pyrolysis. The pore and chemical structure of char samples were characterized and the ash composition was analyzed. The oxidation reactivity of the mixtures of lignite char/cornstalk char with different blending ratios and the co-pyrolysis char of lignite and cornstalk with corresponding blending ratios were investigated by the isothermal thermogravimetry at 450℃, aimed at the effect of co-pyrolysis process on the char reactivity. The results show that there are obvious influences on the char structures through secondary reactions during co-pyrolysis process, leading to the char reactivity decrease. Especially with the cornstalk proportion less than 50%, these influences are more significant due to a large number of volatiles from cornstalk during co-pyrolysis enhancing the secondary reactions between the volatile and nascent char, prompting parts of organic structure less than 5 rings turn into the larger organic structure. For the char samples with cornstalk proportion above 50%, the catalytic effect of alkaline and alkaline earth metal in biomass char plays a dominating role, especially the effect of potassium, resulting in the weaker effects of secondary reactions on the structure and oxidation reactivity of the char samples.