The Fe–Ca catalysts in catalytic pyrolysis of brown coals were studied to investigate the catalytic activity of the Fe–Ca in a fixed-bed reactor. Experimental results showed the maximum yields of the light aromatic hydrocarbons (LAHs) were 5.90 wt% (0.88 wt% of benzene, toluene and xylene ‘BTX’, 4.10 wt% of phenol and cresol ‘PC’ and 0.92 wt% of naphthalene) when the 1.5% Ca was added into 5% Fe-loaded brown coal. The yields of water and gas significantly reduced, the tar yield gradually increased with increasing heating rate. The characterization results indicated that when calcium promoter was impregnated with iron, Ca₂Fe₂O₅, CaO, Fe₂O₃ and α-Fe were formed on the surface of the coal char, Ca₂Fe₂O₅ and α-Fe decomposed polyaromatic tar, CaO and Fe₂O₃ accelerated water gas shift reaction to enhance the H₂ yield, the Fe₂O₃ and Ca₂Fe₂O₅ could be reduced to α-Fe by volatiles (C, CO and H₂) under high temperature catalytic pyrolysis. The synergistic effects between iron and calcium improved brown coal pyrolysis and the volatiles such as free radical fragments were further pyrolyzed, indicating that Fe–Ca catalysts inhibited α-Fe deactivation by tar and carbon deposition, thus promoting brown coal pyrolysis and formation of CO_x, H₂ and LAHs.

研究了褐煤催化热解过程中的Fe-Ca催化剂，以研究固定床反应器中Fe-Ca的催化活性。实验结果表明，轻质芳烃（LAH）的最大收率为5.90 wt％（苯，甲苯和二甲苯'BTX'为0.88 wt％，苯酚和甲酚'PC'为4.10 wt％，萘为0.92 wt％）。将1.5％Ca添加到5％Fe负载的褐煤中。水和天然气的产率显着降低，焦油产率随着加热速率的增加而逐渐增加。表征结果表明，当钙启动子被浸渍铁，钙₂的Fe ₂ ø ₅，CaO的，铁₂ ö ₃和的α-Fe形成的煤焦的表面上，钙₂Fe ₂ O ₅和α-Fe分解的多芳烃焦油，CaO和Fe ₂ O ₃促进水煤气变换反应以提高H ₂收率，Fe ₂ O ₃和Ca ₂ Fe ₂ O ₅可以被还原成α-Fe高温催化热解过程中的挥发物（C，CO和H ₂）。铁和钙之间的协同作用改善了褐煤的热解作用，并且进一步裂解了诸如自由基碎片之类的挥发物，表明Fe-Ca催化剂抑制了焦油和碳沉积引起的α-Fe失活，从而促进了褐煤的热解和CO _x的形成。，H ₂和LAHs。