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Pluronic P123作结构导向剂,采用Al(NO3)3-NaAlO_2双水解法合成氧化铝,在成胶过程中加入正硅酸乙酯,制备硅质量分数分别为5%、10%、15%的SiO_2-Al_2O_3载体,并通过共浸渍法制备出Co-Mo/SiO_2-Al_2O_3润滑油加氢处理催化剂。通过XRD、N...以Pluronic P123作结构导向剂,采用Al(NO3)3-NaAlO_2双水解法合成氧化铝,在成胶过程中加入正硅酸乙酯,制备硅质量分数分别为5%、10%、15%的SiO_2-Al_2O_3载体,并通过共浸渍法制备出Co-Mo/SiO_2-Al_2O_3润滑油加氢处理催化剂。通过XRD、N2吸附-脱附、Py-FTIR、NH3-TPD、H2-TPR、TEM和XRF等手段对载体及催化剂的性质进行表征。结果表明,硅质量分数为10%的SiO_2-Al_2O_3具有优良的孔结构、较多的中强酸以及部分有序的介孔结构。以此为载体制备的Co-Mo/10%SiO_2-Al_2O_3催化剂中,Mo S2颗粒均匀地分散在载体上,具有更多的B酸性位和II型Co Mo S活性相。以减二线蜡油为原料油的固定床活性评价结果表明,生成油中主要组分为链烷烃与环烷烃;尤其Co-Mo/10%SiO_2-Al_2O_3催化剂具有优良的加氢性能,在15 M Pa、380℃、氢油比为1000、空速为0.6 h-1的反应条件下,其HDS和HDN数值均超过99%,产品中S含量小于10μg/g,N含量小于2μg/g,可以满足后续异构脱蜡等对原料的要求。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Pluronic P123作结构导向剂,采用Al(NO3)3-NaAlO_2双水解法合成氧化铝,在成胶过程中加入正硅酸乙酯,制备硅质量分数分别为5%、10%、15%的SiO_2-Al_2O_3载体,并通过共浸渍法制备出Co-Mo/SiO_2-Al_2O_3润滑油加氢处理催化剂。通过XRD、N2吸附-脱附、Py-FTIR、NH3-TPD、H2-TPR、TEM和XRF等手段对载体及催化剂的性质进行表征。结果表明,硅质量分数为10%的SiO_2-Al_2O_3具有优良的孔结构、较多的中强酸以及部分有序的介孔结构。以此为载体制备的Co-Mo/10%SiO_2-Al_2O_3催化剂中,Mo S2颗粒均匀地分散在载体上,具有更多的B酸性位和II型Co Mo S活性相。以减二线蜡油为原料油的固定床活性评价结果表明,生成油中主要组分为链烷烃与环烷烃;尤其Co-Mo/10%SiO_2-Al_2O_3催化剂具有优良的加氢性能,在15 M Pa、380℃、氢油比为1000、空速为0.6 h-1的反应条件下,其HDS和HDN数值均超过99%,产品中S含量小于10μg/g,N含量小于2μg/g,可以满足后续异构脱蜡等对原料的要求。
