Effect of impregnation method on hydrocracking performance of Ni-W/Y-ASA catalyst

doi:10.16085/j.issn.1000-6613.2020-1495

Abstract

Abstract:

Amorphous silica alumina (ASA) with high surface area and modified Y zeolite (USY) were used to prepare the carrier of a series of Ni-W/Y-ASA catalysts, which were prepared by traditional impregnation method, aluminum sol impregnation method, USY powder impregnation method and ASA powder impregnation method. N₂ adsorption-desorption, SEM, NH₃-TPD, Py-IR and particle strength tester were used to explore the texture, morphology, acidity properties and mechanical strength of the catalysts prepared by different impregnation methods, and the prepared catalysts were applied to the hydrocracking reaction of n-decane. The Ni-W/Y-ASA catalyst prepared by ASA powder impregnation method retained more acidic sites on USY and had the maximum Br?nsted acid content, which enhanced the acid properties of the catalyst and thus improved its cracking activity.

Key words: impregnation method, hydrogenation, catalyst, Y-zeolite, amorphous silica alumina

摘要：

以高比表面积无定形硅铝（ASA）和改性Y型分子筛（USY）为原料制备催化剂载体，分别采用传统浸渍法、铝溶胶浸渍法、USY粉体浸渍法和ASA粉体浸渍法制备Ni-W/Y-ASA催化剂。采用氮气吸附-脱附、扫描电镜（SEM）、氨气程序升温脱附（NH₃-TPD）、吸附吡啶原位红外（Py-IR）和颗粒强度测定仪等表征手段，探究不同的浸渍方法对催化剂的织构性质、形貌、酸性以及机械强度的影响，并将制备的催化剂应用于正癸烷的加氢裂化反应。结果表明，采用ASA粉体浸渍方法，因较多地保留了Ni-W/Y-ASA催化剂中USY粉体上的B酸性位，使催化剂具有最多的B酸含量，增强了催化剂的酸性质，进而提高了催化剂在以正癸烷为模型化合物的加氢裂化反应中的裂化活性。

关键词: 浸渍方法, 加氢, 催化剂, Y型分子筛, 无定形硅铝

CLC Number:

TE624.9

GE Jiaqi, XIE Fangming, LIU Siwei, MA Yanlong, LI Haiyan, TIAN Hongyu, SUN Famin, LIU Baijun. Effect of impregnation method on hydrocracking performance of Ni-W/Y-ASA catalyst[J]. Chemical Industry and Engineering Progress, 2021, 40(6): 3191-3196.

葛佳琪, 谢方明, 刘思危, 马艳龙, 李海岩, 田宏宇, 孙发民, 刘百军. 浸渍方法对Ni-W/Y-ASA催化剂加氢裂化性能的影响[J]. 化工进展, 2021, 40(6): 3191-3196.

Figures/Tables 7

References 16

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样品	机械强度 /N·cm^-1	比表面积 /m²·g^-1	孔容 /mL·g^-1	平均孔径 /nm
Cat-JZ	109	329	0.53	6.5
Cat-JJ	60	275	0.57	8.3
Cat-YJ	112	394	0.76	7.7
Cat-ASAJ	101	333	0.53	6.1

样品	机械强度 /N·cm^-1	比表面积 /m²·g^-1	孔容 /mL·g^-1	平均孔径 /nm
Cat-JZ	109	329	0.53	6.5
Cat-JJ	60	275	0.57	8.3
Cat-YJ	112	394	0.76	7.7
Cat-ASAJ	101	333	0.53	6.1

样品	酸量/μmol·g^-1
	200℃				350℃
	B	L	B+L	B/L	B	L	B+L	B/L
Cat-JZ	49.3	172.1	221.4	0.29	34.1	100.4	134.5	0.34
Cat-JJ	76.3	137.5	213.8	0.55	35.2	109.7	144.9	0.32
Cat-YJ	57.1	178.3	235.4	0.32	22.7	127.1	149.8	0.18
Cat-ASAJ	84.6	150.6	235.2	0.56	49.3	108.2	157.5	0.46

样品	酸量/μmol·g^-1
	200℃				350℃
	B	L	B+L	B/L	B	L	B+L	B/L
Cat-JZ	49.3	172.1	221.4	0.29	34.1	100.4	134.5	0.34
Cat-JJ	76.3	137.5	213.8	0.55	35.2	109.7	144.9	0.32
Cat-YJ	57.1	178.3	235.4	0.32	22.7	127.1	149.8	0.18
Cat-ASAJ	84.6	150.6	235.2	0.56	49.3	108.2	157.5	0.46

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