During co-pyrolysis, active alkali and alkaline earth metals (AAEMs) can influence the synergistic effect of coal and biomass. For exploring the influence of active AAEMs on the co-pyrolysis process, this paper studied the physicochemical properties and gasification reactivity of co-pyrolysis char of four blends: raw coal and raw corn stalks (RC&RCS), pickling coal and raw corn stalks (HC&RCS), raw coal and pickling corn stalks (RC&HCS), and pickling coal and pickling corn stalks (HC&HCS). The results show that the synergistic effects on char yields are within 3%. During co-pyrolysis, the presence of corn stalks is beneficial to the generation of spherical particles from coal char, and the promotion effect of pickling corn stalks is greater than that of the raw corn stalks. The active AAEMs have an inhibitory effect on the decomposition of aliphatic C–H, CO and –CH₃ in Shenmu coal, and also on the decomposition of O–H, aliphatic C–H and C–O in the corn stalks. The experimental values of gasification residual carbon of RC&RCS/HC&RCS co-pyrolysis char are 24–77% of the calculated values, while that of RC&HCS/HC&HCS co-pyrolysis char are 86–103% of the calculated values. The interaction between the blends promotes the reactivity of co-pyrolysis char.

在共热解过程中，活性碱金属和碱土金属（AAEM）会影响煤和生物质的协同作用。为了探索活性AAEM对共热解过程的影响，本文研究了共混焦炭的四种理化性质和气化反应性：原料煤和原料玉米秸秆（RC＆RCS），酸洗煤炭和原料玉米秸秆（HC＆RCS） ），原煤和酸洗玉米秸秆（RC＆HCS），以及酸洗煤和酸洗玉米秸秆（HC＆HCS）。结果表明，对焦炭收率的协同效应在3％以内。在共热解过程中，玉米秸秆的存在有利于从煤焦中生成球形颗粒，酸洗玉米秸秆的促进作用要大于未加工的玉米秸秆。神木煤中的O和–CH ₃以及玉米秸秆中O–H，脂肪族C–H和C–O的分解。RC＆RCS / HC＆RCS共热解焦炭的气化残余碳的实验值是计算值的24–77％，而RC＆HCS / HC＆HCS共热解焦炭的气化残余碳的实验值是计算值的86–103％。共混物之间的相互作用促进了共热解炭的反应性。