The deactivation of Ni/SiO2-Al2 O3 catalyst in hydrogenation of crude 1,4-butanediol was investigated.During the operation time of 2140 h,the catalyst showed slow activity decay.Characterization results,for four spent...The deactivation of Ni/SiO2-Al2 O3 catalyst in hydrogenation of crude 1,4-butanediol was investigated.During the operation time of 2140 h,the catalyst showed slow activity decay.Characterization results,for four spent catalysts used at different time,indicated that the main reason of the catalyst deactivation was the deposition of carbonaceous species that covered the active Ni and blocked mesopores of the catalyst.The TPO and SEM measurements revealed that the carbonaceous species included both oligomeric and polymeric species with high C/H ratio and showed sheet.Such carbonaceous species might be eliminated through either direct H2 reduction or the combined oxidation-reduction methodologies.展开更多
以TiO_2-Al_2O_3复合物为载体,采用浸渍法负载金属Ni制备了Ni/TiO_2-Al_2O_3裂解汽油预加氢催化剂(YN-1型)。针对裂解C_9^+原料在实验室200 m L加氢小试装置上进行了评价,并在新疆独山子天利实业总公司裂解C_9^+预加氢装置上对该催化剂...以TiO_2-Al_2O_3复合物为载体,采用浸渍法负载金属Ni制备了Ni/TiO_2-Al_2O_3裂解汽油预加氢催化剂(YN-1型)。针对裂解C_9^+原料在实验室200 m L加氢小试装置上进行了评价,并在新疆独山子天利实业总公司裂解C_9^+预加氢装置上对该催化剂进行了工业应用。实验室评价结果表明,YN-1型催化剂用于裂解C_9^+原料一段加氢,不但具有良好的低温加氢活性和选择性,且稳定性良好;工业应用结果表明,在反应器入口温度远低于设计温度的条件下,对于胶质含量(基于100 m L原料油)大于100 mg和溴价(基于100 g原料油)大于95 g的裂解C_9^+原料进行预加氢,装置操作平稳,催化剂床层未出现飞温现象,催化剂能够适应超过90℃的反应温升;加氢产品中苯乙烯类芳烃、二烯烃、双环二烯烃和茚的含量(w)比原料分别下降了75.51%,91.00%,85.51%,56.64%,且芳烃没有损失。展开更多
This work reports the enhancing effect of a highly cost effective and efficient metal, Fe, incorporation to Co or Ni based Mo/Al2O3 catalysts in the oxidative desulfurization （ODS） of dibenzothiophene （DBT） using ...This work reports the enhancing effect of a highly cost effective and efficient metal, Fe, incorporation to Co or Ni based Mo/Al2O3 catalysts in the oxidative desulfurization （ODS） of dibenzothiophene （DBT） using H2O2 and formic acid as oxidants. The influence of operating parameters i.e. reaction time, catalyst dose, reaction temperature and oxidant amount on oxidation process was investigated. Results revealed that 99% DBT conversion was achieved at 60℃ and 150 min reaction time over Fe-Ni-Mo/Al2O3. Fe tremendously enhanced the ODS activity of Co or Ni based Mo/Al2O3 catalysts following the activity order：Fe-Ni-Mo/Al2O3 〉 Fe-Co-Mo/Al2O3 〉 Ni-Mo/Al2O3 〉 Co-Mo/Al2O3, while H2O2 exhibited higher oxidation activity than formic acid over all catalyst systems. Insight about the surface morphology and textural properties of fresh and spent catalysts were achieved using scanning electron microscopy （SEM）, X-ray diffraction （XRD）, energy dispersive X-ray （EDX） analysis, Atomic Absorption Spectroscopy （AAS） and BET surface area analysis, which helped in the interpretation of experimental data. The present study can be deemed as an effective approach on industrial level for ODS of fuel oils crediting to its high efficiency, low process/catalyst cost, safety and mild operating condition.展开更多
基金Supported by the National Natural Science Foundation of China(21673132).
文摘The deactivation of Ni/SiO2-Al2 O3 catalyst in hydrogenation of crude 1,4-butanediol was investigated.During the operation time of 2140 h,the catalyst showed slow activity decay.Characterization results,for four spent catalysts used at different time,indicated that the main reason of the catalyst deactivation was the deposition of carbonaceous species that covered the active Ni and blocked mesopores of the catalyst.The TPO and SEM measurements revealed that the carbonaceous species included both oligomeric and polymeric species with high C/H ratio and showed sheet.Such carbonaceous species might be eliminated through either direct H2 reduction or the combined oxidation-reduction methodologies.
文摘以TiO_2-Al_2O_3复合物为载体,采用浸渍法负载金属Ni制备了Ni/TiO_2-Al_2O_3裂解汽油预加氢催化剂(YN-1型)。针对裂解C_9^+原料在实验室200 m L加氢小试装置上进行了评价,并在新疆独山子天利实业总公司裂解C_9^+预加氢装置上对该催化剂进行了工业应用。实验室评价结果表明,YN-1型催化剂用于裂解C_9^+原料一段加氢,不但具有良好的低温加氢活性和选择性,且稳定性良好;工业应用结果表明,在反应器入口温度远低于设计温度的条件下,对于胶质含量(基于100 m L原料油)大于100 mg和溴价(基于100 g原料油)大于95 g的裂解C_9^+原料进行预加氢,装置操作平稳,催化剂床层未出现飞温现象,催化剂能够适应超过90℃的反应温升;加氢产品中苯乙烯类芳烃、二烯烃、双环二烯烃和茚的含量(w)比原料分别下降了75.51%,91.00%,85.51%,56.64%,且芳烃没有损失。
文摘This work reports the enhancing effect of a highly cost effective and efficient metal, Fe, incorporation to Co or Ni based Mo/Al2O3 catalysts in the oxidative desulfurization （ODS） of dibenzothiophene （DBT） using H2O2 and formic acid as oxidants. The influence of operating parameters i.e. reaction time, catalyst dose, reaction temperature and oxidant amount on oxidation process was investigated. Results revealed that 99% DBT conversion was achieved at 60℃ and 150 min reaction time over Fe-Ni-Mo/Al2O3. Fe tremendously enhanced the ODS activity of Co or Ni based Mo/Al2O3 catalysts following the activity order：Fe-Ni-Mo/Al2O3 〉 Fe-Co-Mo/Al2O3 〉 Ni-Mo/Al2O3 〉 Co-Mo/Al2O3, while H2O2 exhibited higher oxidation activity than formic acid over all catalyst systems. Insight about the surface morphology and textural properties of fresh and spent catalysts were achieved using scanning electron microscopy （SEM）, X-ray diffraction （XRD）, energy dispersive X-ray （EDX） analysis, Atomic Absorption Spectroscopy （AAS） and BET surface area analysis, which helped in the interpretation of experimental data. The present study can be deemed as an effective approach on industrial level for ODS of fuel oils crediting to its high efficiency, low process/catalyst cost, safety and mild operating condition.
