当前位置：
X-MOL 学术
›
Ind. Eng. Chem. Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Modulating the Interaction of NiSO4 and Nb2O5 Boosts the Dimerization of Propylene
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-04-30 , DOI: 10.1021/acs.iecr.1c00142 Yu Ling 1 , Xiao Chen 1 , Hongkai Tong 1 , Weixiang Guan 1 , Ping Chen 2 , Zhaohui Huang 2 , Changhai Liang 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-04-30 , DOI: 10.1021/acs.iecr.1c00142 Yu Ling 1 , Xiao Chen 1 , Hongkai Tong 1 , Weixiang Guan 1 , Ping Chen 2 , Zhaohui Huang 2 , Changhai Liang 1
Affiliation
|
Propylene dimerization is an attractive way to branch out the bulk chemicals to high-value-added fine chemicals. Based on the coordinatively unsaturated surface sites of nickel and solid acid sites for boosting highly selective dimerization of propylene, a series of NiSO4/Nb2O5 catalysts were synthesized by tuning the synergistic effect through adjusting the calcination temperatures. Under the conditions of 70 °C, 2.5 MPa, and LHSV = 3 h–1 in a fixed-bed reactor, the NiSO4/Nb2O5-400 catalyst exhibits the highest propylene conversion of ca. 89% with 75% selectivity to C6 products (mainly including 4-methyl-2-pentene and 3-hexene). A possible Cossee–Arlman pathway has been proposed for the dimerization of propylene. In the long-term stability testing, an induction period has been observed, which may be attributed to the coordination of propylene molecules to unsaturated Ni2+ cations generating some active nickel species. Subsequently, the NiSO4/Nb2O5-400 catalyst presents a stability up to 30 h. The interesting results inspired us to modulate the interaction of metal (salt) and acid sites to strengthen the selective dimerization of low-carbon olefins.
中文翻译：
调节NiSO 4和Nb 2 O 5的相互作用促进丙烯的二聚
丙烯二聚是将大宗化学物质分支为高附加值精细化学物质的一种有吸引力的方法。基于镍的配位不饱和表面位点和用于促进丙烯高选择性二聚的固体酸位点，通过调节煅烧温度调节协同效应，合成了一系列NiSO 4 / Nb 2 O 5催化剂。在固定床反应器中，在70°C，2.5 MPa和LHSV = 3 h –1的条件下，NiSO 4 / Nb 2 O 5 -400催化剂的丙烯转化率最高。对C6产物（主要包括4-甲基-2-戊烯和3-己烯）具有89％的选择性和75％的选择性。已经提出了可能的Cossee-Arlman途径用于丙烯的二聚化。在长期稳定性测试中，观察到诱导期，这可能归因于丙烯分子与产生一些活性镍物质的不饱和Ni 2+阳离子的配位。随后，NiSO 4 / Nb 2 O 5 -400催化剂具有长达30小时的稳定性。有趣的结果激发了我们调节金属（盐）和酸性位点之间的相互作用，以增强低碳烯烃的选择性二聚作用。
更新日期：2021-05-19
中文翻译：
调节NiSO 4和Nb 2 O 5的相互作用促进丙烯的二聚
丙烯二聚是将大宗化学物质分支为高附加值精细化学物质的一种有吸引力的方法。基于镍的配位不饱和表面位点和用于促进丙烯高选择性二聚的固体酸位点，通过调节煅烧温度调节协同效应，合成了一系列NiSO 4 / Nb 2 O 5催化剂。在固定床反应器中，在70°C，2.5 MPa和LHSV = 3 h –1的条件下，NiSO 4 / Nb 2 O 5 -400催化剂的丙烯转化率最高。对C6产物（主要包括4-甲基-2-戊烯和3-己烯）具有89％的选择性和75％的选择性。已经提出了可能的Cossee-Arlman途径用于丙烯的二聚化。在长期稳定性测试中，观察到诱导期，这可能归因于丙烯分子与产生一些活性镍物质的不饱和Ni 2+阳离子的配位。随后，NiSO 4 / Nb 2 O 5 -400催化剂具有长达30小时的稳定性。有趣的结果激发了我们调节金属（盐）和酸性位点之间的相互作用，以增强低碳烯烃的选择性二聚作用。
京公网安备 11010802027423号