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化学分散量
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     The results showed that the promoter Ni combined with 2 types of stronger metal support interaction centers, resulting in formation of NiMoO 4 like compound.
     活性金属Mo在γ Al2 O3 表面上的化学分散量(分散阈值 )可达 5 0 4~ 5 82 μmol/m2 .因而特别适合用作高活性加氢处理催化剂的载体 .
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     The results, by using PASCA, N_2 physical adsorption and bench-scale tests, etc. show that FW catalyst has better surface properties, higher chemically dispersed amount of active components (MoO_3), larger pore diameter, pore volume and specific surface area, concentrated pore distribution, stronger mechanical strength, better adaptability to various wax feeds, higher hydrofining activity and stability.
     PASCA、低温N2 吸附以及小型加氢实验装置等相关技术分析表征和试验评价的结果表明 ,FW新型催化剂具有优良的表面性质 ,活性组分 (MoO3 )在其表面上有较高的上载量和高的化学分散量 ,且具有较大的孔径 ,孔容和比表面积 ,孔分布集中 ,机械强度高 ,活性高 ,稳定性好和对原料蜡的适应性强等优点。
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     The BET surface areas of these supports were examined by BET method, the status of dispersion and the chemical dispersion amount of WO_3 in different supports were also examined by XRD and ammonia-disslove action test. The effect of interaction between WO_3 and support on the dispersibility of WO_3 were discussed.
     通过BET方法测定了载体的比表面积 ,采用XRD、氨溶-分光光度法 ,测定了WO3在不同载体上的分散状态及化学分散量 ,探讨了WO3与不同载体的相互作用以及对WO3在载体上的分散性的影响。
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Based on the characterization of a series of commercial γ Al 2O 3, a new type of γ Al 2O 3 has been developed. The γ Al 2O 3 has larger CDA for active metal (such as Mo or W) from 5 04 to 5 82 μmol/m 2, and also has larger pore diameter, concentrated pore volume distribution and higher mechanical strength, so it can be used as a good support for hydrotreating catalysts. The MoNiP/Al 2O 3 catalyst has been prepared and the effect of promoters Ni and P was studied by means of PASCA in...

Based on the characterization of a series of commercial γ Al 2O 3, a new type of γ Al 2O 3 has been developed. The γ Al 2O 3 has larger CDA for active metal (such as Mo or W) from 5 04 to 5 82 μmol/m 2, and also has larger pore diameter, concentrated pore volume distribution and higher mechanical strength, so it can be used as a good support for hydrotreating catalysts. The MoNiP/Al 2O 3 catalyst has been prepared and the effect of promoters Ni and P was studied by means of PASCA in conjunction with XPS, DRS, TPR and microreaction chromatography. The results showed that the promoter Ni combined with 2 types of stronger metal support interaction centers, resulting in formation of NiMoO 4 like compound. The optimum Ni content is w (NiO)=4 0% ( n (Ni)/ n (Mo)=0 323) in the catalyst. The promoter P plays a role in inhibiting the formation of tetrahedral structure Mo[T] and in promoting the formation of octahedral structure Mo[O]. The optimum P content is w (P)=2 6% ( n (P)/ n (Mo)=0 084) in the catalyst.

采用专利方法制备出一种新型的γ Al2 O3 ,并以其为载体 ,制备出加氢处理催化剂MoNiP/Al2 O3 .用PAS CA ,XPS ,DRS ,TPR和微型反应色谱等技术对γ Al2 O3 和催化剂进行了表征 ,考察了Ni和P两种助剂的作用 .结果表明 ,γ Al2 O3 具有较大的孔径 ,集中的孔分布和较高的机械强度 ;活性金属Mo在γ Al2 O3 表面上的化学分散量(分散阈值 )可达 5 0 4~ 5 82 μmol/m2 .因而特别适合用作高活性加氢处理催化剂的载体 .引入的Ni主要是同Mo/Al2 O3 催化剂表面上较稳定的金属 载体相互作用复合物反应 ,并生成类NiMoO4 化合物 ;在MoNi/Al2 O3 催化剂中引入P ,有利于抑制四面体配位结构的物种Mo[T],增加八面体配位结构的物种Mo[O],改善催化剂的还原性能 ,从而提高催化剂的加氢处理活性 .助剂Ni和P的最佳含量分别为w(Ni) =4 0 %和w(P) =2 6 % .

This paper introduces the properties of γ-Al_2O_3 carrier prepared by a new method and FW catalyst based on the newly developed γ-Al_2O_3 carrier. The results, by using PASCA, N_2 physical adsorption and bench-scale tests, etc. show that FW catalyst has better surface properties, higher chemically dispersed amount of active components (MoO_3), larger pore diameter, pore volume and specific surface area, concentrated pore distribution, stronger mechanical strength, better adaptability to various wax feeds, higher...

This paper introduces the properties of γ-Al_2O_3 carrier prepared by a new method and FW catalyst based on the newly developed γ-Al_2O_3 carrier. The results, by using PASCA, N_2 physical adsorption and bench-scale tests, etc. show that FW catalyst has better surface properties, higher chemically dispersed amount of active components (MoO_3), larger pore diameter, pore volume and specific surface area, concentrated pore distribution, stronger mechanical strength, better adaptability to various wax feeds, higher hydrofining activity and stability. The newly developed FW catalyst is much better than the reference catalyst for its hydrofining activity for hydrofining various wax feeds under the same operation conditions.

介绍了一种按新方法制备的γ -Al2 O3 载体以及在该载体基础上研制开发的FW石蜡加氢精制催化剂的性能。PASCA、低温N2 吸附以及小型加氢实验装置等相关技术分析表征和试验评价的结果表明 ,FW新型催化剂具有优良的表面性质 ,活性组分 (MoO3 )在其表面上有较高的上载量和高的化学分散量 ,且具有较大的孔径 ,孔容和比表面积 ,孔分布集中 ,机械强度高 ,活性高 ,稳定性好和对原料蜡的适应性强等优点。在相同工艺条件下用于多种原料蜡的加氢精制 ,其加氢性能优于同类参比催化剂。

Supported WO_3 catalysts with γ-Al_2O_3, SiO_2, SiO2-Al_2O_3, HY and SiBAPO-5 supports were prepared by means of impregnation method. The BET surface areas of these supports were examined by BET method, the status of dispersion and the chemical dispersion amount of WO_3 in different supports were also examined by XRD and ammonia-disslove action test. The effect of interaction between WO_3 and support on the dispersibility of WO_3 were discussed. The nitriding of WO_3 was characterized by in-situ TG-DTA technique,...

Supported WO_3 catalysts with γ-Al_2O_3, SiO_2, SiO2-Al_2O_3, HY and SiBAPO-5 supports were prepared by means of impregnation method. The BET surface areas of these supports were examined by BET method, the status of dispersion and the chemical dispersion amount of WO_3 in different supports were also examined by XRD and ammonia-disslove action test. The effect of interaction between WO_3 and support on the dispersibility of WO_3 were discussed. The nitriding of WO_3 was characterized by in-situ TG-DTA technique, meanwhile, the influence of WO_3 nitrided to W_2N caused by interaction of WO_3 and support was studied.

分别以γ -Al2 O3、SiO2 、无定型硅铝粉 (SiO2 -Al2 O3)、Y型分子筛 (HY)及硅硼磷铝分子筛 (SiBAPO -5 )为载体 ,用浸渍法制备了不同载体负载的WO3催化剂。通过BET方法测定了载体的比表面积 ,采用XRD、氨溶-分光光度法 ,测定了WO3在不同载体上的分散状态及化学分散量 ,探讨了WO3与不同载体的相互作用以及对WO3在载体上的分散性的影响。通过原位TG -DTA方法对WO3氮化还原成W2 N过程进行了分析 ,探讨了WO3与载体相互作用对WO3氮化还原成W2 N的影响

 
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