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Effects of
m (SiO2):m (Al2O3) on catalytic performances of supported Ni catalysts for ethylene oligomerization- Low-Carbon Chemistry and Chemical Engineering Vol. 50, Issue 12, Pages: 40-47(2025)
- 作者机构：
郑州大学 化工学院，河南 郑州 450001
- 作者简介：
- 基金信息：
DOI：10.12434/j.issn.2097-2547.20250079
CLC： TQ21;O63Received：03 March 2025，
Revised：2025-04-03，
Published：25 December 2025
- 稿件说明：
移动端阅览
胡婷婷,付鑫鑫,党闪闪等.m(SiO2):m(Al2O3)对负载型Ni催化剂乙烯齐聚反应催化性能的影响[J].低碳化学与化工,2025,50(12):40-47.
HU Tingting,FU Xinxin,DANG Shanshan,et al.Effects of m(SiO2):m(Al2O3) on catalytic performances of supported Ni catalysts for ethylene oligomerization[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(12):40-47.
胡婷婷,付鑫鑫,党闪闪等.m(SiO2):m(Al2O3)对负载型Ni催化剂乙烯齐聚反应催化性能的影响[J].低碳化学与化工,2025,50(12):40-47. DOI： 10.12434/j.issn.2097-2547.20250079.
HU Tingting,FU Xinxin,DANG Shanshan,et al.Effects of m(SiO2):m(Al2O3) on catalytic performances of supported Ni catalysts for ethylene oligomerization[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(12):40-47. DOI： 10.12434/j.issn.2097-2547.20250079.
摘要
乙烯齐聚是工业合成高碳
α
-烯烃的主要途径。传统均相催化体系存在催化剂分离困难及产物选择性较差等问题，需开发新型多相催化体系实现工艺优化。采用溶胶-凝胶法+浸渍法制备了一系列无定型硅酸铝盐负载的Ni催化剂，探究了不同
m
(SiO
2
):
m
(Al
2
O
3
)对Ni催化剂物化性质及乙烯齐聚反应催化性能的影响。结果表明，在温度为240 °C 、压力为1.5 MPa和空速为10000 mL/(g·h)的条件下反应6 h，Ni质量分数为5%、
m
(SiO
2
):
m
(Al
2
O
3
) = 9:11的催化剂（Ni
5
/Si
9
-Al
11
）表现出最佳催化性能，其乙烯转化率为71.36%，产物以C
4
~C
8
偶数烯烃为主，其中C
4
烯烃选择性高达81.78%。催化剂中
m
(SiO
2
):
m
(Al
2
O
3
)的差异对Ni的化学价态无影响，Ni始终以Ni
2+
形式存在。
Abstract
Ethylene oligomerization is the primary route for industrial synthesis of higher carbon
α
-olefins. Traditional homogeneous catalytic systems face challenges such as difficult in catalyst separation and poor product selectivity
necessitating the development of novel heterogeneous catalytic systems for process optimization. A series of Ni catalysts supported on amorphous aluminum silicates were prepared by sol-gel method + impregnation method
and the effects of different
m
(SiO
2
):
m
(Al
2
O
3
) on physicochemical properties of the Ni catalysts and their catalytic performances in ethylene oligomerization were investigated. The results show that under the reaction conditions of temperature of 240 °C
pressure of 1.5 MPa and space velocity of 10000 mL/(g·h) for 6 h
the catalyst (Ni
5
/Si
9
-Al
11
) with Ni mass fraction of 5% and
m
(SiO
2
):
m
(Al
2
O
3
) of 9:11 exhibits the best catalytic performance. It achieves ethylene conversion rate of 71.36%
with the products dominate by C
4
~C
8
even-numbered olefins. Notably
the C
4
olefins selectivity reaches 81.78%. Differences of
m
(SiO
2
):
m
(Al
2
O
3
) in the catalysts have no impact on chemical valence state of Ni
which remains in the Ni
2+
form.
关键词
Keywords
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