The effects of Ca and Fe of a bimetallic Ca–Fe catalyst when applied to pine sawdust pyrolysis were investigated by thermogravimetry-mass spectrometry. Trials were also performed using heterotopic Ca–Fe and HZSM-5 to catalyse the degradation of pine sawdust to produce aromatic hydrocarbons, employing a fixed bed reactor and gas chromatography-mass spectrometry. The presence of CaO was found to promote deoxygenation while Fe enhanced in situ hydrogen supply, whereas the Ca–Fe catalyst combined these effects. This material promoted the formation of low-oxygen compounds to generate precursors that were transformed into aromatics via HZSM-5. Up to 90.47% aromatic proportion and a 31.02 mg g⁻¹ benzene/toluene/ethylbenzene/xylene yield were obtained at 600 °C using a 1 : 1 mass ratio of Ca–Fe to HZSM-5 and a 2 : 1 mass ratio of catalysts to pine sawdust. This combination of catalysts is evidently an effective means of strengthening the pyrolysis of pine sawdust to produce aromatic hydrocarbons.

中文翻译：

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异位 Ca-Fe 和 HZSM-5 催化降解松木屑生产芳香烃

通过热重-质谱法研究了双金属 Ca-Fe 催化剂中 Ca 和 Fe 应用于松木屑热解时的影响。还进行了试验，采用固定床反应器和气相色谱-质谱法，使用异位 Ca-Fe 和 HZSM-5 催化松木屑降解生产芳香烃。研究发现 CaO 的存在可以促进脱氧，而 Fe 可以增强原位氢的供应，而 Ca-Fe 催化剂则结合了这些效果。这种材料促进了低氧化合物的形成，从而产生前体，并通过HZSM-5 转化为芳烃。使用Ca-Fe与HZSM-5的质量比为1:1以及Ca-Fe与HZSM-5的质量比为2:1，在600℃下获得高达90.47%的芳烃比例和31.02 mg g ^{-1 的}苯/甲苯/乙苯/二甲苯收率。松木屑的催化剂。这种催化剂组合显然是加强松木屑热解生产芳香烃的有效手段。