INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2021
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IF 3.764
Yu Ling,Xiao Chen,Hongkai Tong,Weixiang Guan,Ping Chen,Zhaohui Huang,Changhai Liang
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.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
Advanced Energy and Sustainability Research
·
2022
·Vol. 3
·期 11
·2200055
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IF 0
Benben Shen,Mengjiong Chen,Fan Zhang,Da Liu,Xinyi Liu,Jin Xie,Shuang Yang,Yu Hou,Hua Gui Yang
Herein, the scalable chemical bath deposited NiO x -NiSO 4 heterostructured films are reported as the efficient hole transport layers (HTLs) in perovskite solar cells. The NiO x -NiSO 4 films show excellent hole extraction ability and reduce interfacial charge recombination in solar cell devices. By using NiO x -NiSO 4 HTLs, a high power conversion efficiency of 20.55% is obtained, which is about 12.23% greater than that of the pure NiO x transport layer. This study provides a simple solution-processing route toward the large-area production and fabrication of full inorganic transport layers for perovskite photovoltaics.
研究领域:
材料科学
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能源科学
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光伏技术
✓ 已验证
产品关联
DOI
Molecular Catalysis
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2023
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IF 4.6
Xiaoqing Zhang,Yuewen Shao,Kai Sun,Mengjiao Fan,Shu Zhang,Xun Hu
Nickel-based catalysts are widely used in hydrogenation of varied types of organics. However, the nickel catalyst, like Ni/SiO 2 , lacks selectivity for hydrogenation of C=C and C=O. This is undesirable in some scenarios, such as conversion of biomass-derived furfuryl alcohol (FA) to cyclopentanone (CPO), a fine chemical, in which the C=C in furan ring of FA needs to be retained. In this study, introduction of sulfur species to Ni/SiO 2 catalyst via loading NiSO 4 was adopted to inhibit hydrogenation of furan ring in FA, aiming to achieve conversion of FA to CPO via ring-opening route. The results indicated that NiSO 4 was reduced to Ni x S y , which further reacted with metallic Ni, forming Ni 3 S 2 species and introducing the acidic sites with high-strength. The co-existence of Ni x S y and metallic Ni species effectively hindered hydrogenation of furan ring in FA, reducing tetrahydrofurfuryl alcohol (THFA) yield from 97% over Ni/SiO 2 to 0 over the NiS x /SiO 2 catalysts and shifting the major product to CPO. Nonetheless, the enhanced acidic sites along with the introduction of NiSO 4 catalyzed polymerization of reaction intermediates, competing with the production of CPO. The acidic sites, however, facilitated hydrogenolysis of vanillyl alcohol to selectively produce (yield: 94.3%) in hydrogenation of vanillin. Characterization of hydrogenation of FA with in-situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) technique suggested the oxygen-containing functionalities in FA, instead of furan ring, could strongly adsorb on the NiS 10 /SiO 2 catalyst, enhancing rearrangement reaction to form CPO while suppressing hydrogenation of the furan ring.
研究领域:
催化化学
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生物质转化
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材料科学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
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2024
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IF 8.1
Bingnan Zhou,Bo Fan,Zhimin Gong,Shuai Shao,Dongmei Zhou,Shixiang Gao
The excessive usage and emissions of triclosan (TCS) pose a serious threat to aquatic environments. Iron-based bimetallic particles (Pd/Fe, Ni/Fe, and Cu/Fe, etc.) were widely used for the degradation of chlorophenol pollutants. This study proposed a novel synthesis method for the preparation of Ni/Fe bimetallic particles (Ni-Fe bm ) by ball milling microscale zero valent iron ZVI (mZVI) and NiSO 4 . Ball-milling conditions such as ball-milling time, ball-milling speed and ball-to-powder ratio were optimized to prepare high activity Ni-Fe bm bimetallic particles. During the ball-milling process, Ni 2+ was reduced to Ni 0 and formed a coupled structure with ZVI. The amount of Ni 0 on ZVI significantly affected the activity of Ni-Fe bm bimetallic particles. The highest activity Ni-Fe bm bimetallic particles with Ni/Fe ratio of 0.03 were synthesized under optimized conditions, which could remove 86.56% of TCS (10 μM) in aerobic aqueous solution within 60 min. In addition, higher particle dosage, lower pH condition and higher reaction temperature were more conducive for TCS degradation. The higher corrosion current and lower electron transfer impedance of Ni-Fe bm bimetallic particles were the main reasons for its high activity. The hydrogen atom (•H) on the surface of Ni-Fe bm bimetallic particles was mainly contributed to the removal of TCS, as reductive transformation products of TCS were detected by LC-TOF-MS. Notably, a small amount of oxidation products were discovered. The total dechlorination rate of TCS was calculated to be 39.67%. After eight reaction cycles, the residual Ni-Fe bm bimetallic particles could still degrade 28.34% of TCS within 6 h. Low Ni 2+ leaching during reaction indicated that Ni-Fe bm bimetallic particles did not pose potential environmental risks. The prepared environmental-friendly Ni-Fe bm bimetallic particles with high activity have great potential in the degradation of other chlorinated organic compounds in wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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水处理
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Lan li,Jie Sun,Hao Ling,Feng Ju
NiSO4/ZnO-Al2O3-SiO2 adsorbent, as a novel reactive adsorption desulfurization (RADS)adsorbent, has self-sulfidation ability and high desulfurization performance when treating model fuel. However, the RADS performance of the adsorbent under FCC gasoline feedstock is not well understood. Here, we compare the performance of the adsorbent under FCC gasoline with model fuel to test the effect of the hydrocarbon composition of the feedstock. The complex composition of FCC gasoline makes it sensitive to the nickel loading amount of the adsorbent. Under the influence of specific surface area and pore structure, the adsorbent loaded with 3 wt% nickel shows better desulfurization activity when treating FCC gasoline. As hydrocarbons in FCC gasoline compete with sulfur compounds for active Ni sites, the reaction conditions have been tested and optimized to achieve deep desulfurization while maintaining low olefin loss to ensure the octane number of the product. By experimental tests and characterization, it has been proved that NiSx and NiO acted as active Ni sites of the adsorbent. Based on these observations, the mechanism of RADS of FCC gasoline over NiSO4/ZnO-Al2O3-SiO2 adsorbent has been proposed, which provides theoretical support for the development of new adsorbents and the optimization of RADS process.
研究领域:
化学工程
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环境科学
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石油炼制
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）