The 0.5% Ni/1% Fe–dolomite catalyst and 1% Fe–dolomite catalyst were used to explore the wash oil catalytic cracking process on a fixed-bed reactor. The experimental results were evaluated by yield distributions of gas, liquid, and solid phases; gas composition distributions; and component varieties of cracked oil. Catalysts were characterized by X-ray diffraction (XRD), thermogravimetric analysis (TG), and an automatic sulfur analyzer. Cracked oil was analyzed by gas chromatography–mass spectrometry (GC–MS). XRD analyses revealed that fresh 0.5% Ni/1% Fe–dolomite catalyst had Ni–Fe and NiO crystal phases, while the used catalyst had CaS and NiS phases when there were sulfur-containing compounds with simple structures in the wash oil. TG results showed that H₂S contributed to the heavy aromatics adsorption on catalyst, and aggravated carbon deposition. GC–MS showed that cracked oil become lighter as a result of acenaphthene cracking into alkanes, biphenylene, and pyrolysis gas. In addition, catalytic cracking of sulfur-containing compounds did not affect the contents of other liquid components.

中文翻译：

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洗油催化裂化过程中白云石催化剂的改性及耐硫特性研究

使用0.5％Ni / 1％Fe-白云石催化剂和1％Fe-白云石催化剂在固定床反应器上探索洗油催化裂化工艺。通过气相，液相和固相的产率分布评估了实验结果；气体成分分布；和裂化油的组成品种。催化剂通过X射线衍射（XRD），热重分析（TG）和自动硫分析仪进行表征。裂解油通过气相色谱-质谱法（GC-MS）进行分析。XRD分析表明，当洗涤油中含有简单结构的含硫化合物时，新鲜的0.5％Ni / 1％铁-白云石催化剂具有Ni-Fe和NiO晶相，而使用的催化剂具有CaS和NiS相。TG结果表明H ₂S有助于重质芳族化合物在催化剂上的吸附，并加剧了碳的沉积。GC-MS表明，由于裂成烷烃，联苯和热解气，裂化后的油变得更轻。另外，含硫化合物的催化裂化不影响其他液体组分的含量。