RENEWABLE ENERGY
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2023
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IF 8.7
Mengxue Song,Chonghao Qiu,Pengfei Ma,Jiawei Zhong,Zhuohan Zhang,Weiping Fang,Wenjing Song,Jianqiang Fan,Weikun Lai
Reductive etherification is an attractive and practical strategy to convert bio-platform compounds into valuable chemicals. In directed synthesis of furfuryl ethers, reductive etherification of bioderived furfurals is still challenging due to the complexity of catalytic reaction . Herein, reductive etherification of furfural with alcohol was investigated over Ni/ZSM-5 catalyst, which found that Si/Al ratios in ZSM-5 played an important role on the catalytic performance. For Ni/ZSM-5 with Si/Al ratio of 50, 80.9% yield of furfuryl ether at 90.8% conversion of furfural was achieved under the condition of 2 MPa H 2 and 180 °C for 3 h in isopropanol. The catalyst exhibited superior stability and recyclability during the consecutive cycle run. Catalysts characterization demonstrated that both acidic properties and furfural adsorption were influenced by the Si/Al ratios in Ni/ZSM-5, which correlated to the reaction route and catalytic performance. Lewis acid sites enhanced furfural hydrogenation into furfuryl alcohol, while Brønsted acid sites on ZSM-5 effectively catalyzed sequential etherification of furfuryl alcohol to furfuryl ether. Under optimization conditions, various furfuryl ethers could be obtained with yields above 80% over Ni/ZSM-5 catalyst in different primary alcohols, demonstrating the general versatility of the approach. Our findings offered opportunities to develop an efficient furfuryl ethers synthesis method .
研究领域:
催化化学
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能源化学
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绿色化学
✓ 已验证
产品关联
DOI
高影响因子
Chem Catalysis
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2024
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IF 11.5
Bin Chen,Shui Yang,Longmei Shang,Yiling Wu,Youting Wang,Jian Tian,Jiale Huang,Xiaodong Zhang,Qingbiao Li,Guowu Zhan
Biomass resources can be converted to biochemicals via the catalytic pyrolysis process, but conventional catalysts often suffer from severe deactivation due to coke formation. Here, a ternary Ni/bio-Z5 catalyst was constructed by integrating ZSM-5 and Ni components on a porous bio-SiO2 platform derived from rice husk. The Ni/bio-Z5 achieved 76% aromatic selectivity for the catalytic pyrolysis of soybean oil, corresponding to a space-time yield as high as 154.8 garom · h−1 · gcata−1. It is confirmed that the bio-SiO2 platform shortened the surface diffusion path of aromatics by co-diffusion, which then inhibited coke formation and significantly improved the catalyst stability. Moreover, the atomically dispersed Ni on ZSM-5 effectively promotes the aromatization of C2=-C6= by enhancing adsorption and acting as an oligomerization center for isoalkyl carbenium ions. The coupling of deoxygenation and aromatization reactions promotes the enhancement of aromatic selectivity through the formation of methyl-substituted cyclopentenone that can be readily converted to aromatics.
研究领域:
能源与环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2024
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IF 5.8
Yingna Li,Muhammad Sajjad Ahmad,Mudassir Hussain Tahir,Maryam Bashir,Arif Muhammad Khan,Rana Muhammad Irfan,Imran Riaz Malik,Boxiong Shen
This study investigates the selective production of aromatics through the co-pyrolysis of cabbage waste and plastics followed by catalytic reforming with Ni-modified ZSM-5. Co-pyrolysis significantly improves the inflection point (a parameter for determining thermal stability) to 251.3 °C from 232.7 °C. This process also enhances the relative yield of olefins and phenols , which are precursors for aromatic production to 25.46 and 17.23 respectively, up from 13.87 to 12.05. Furthermore, catalytic pyrolysis elevates the relative yield of aromatics to 53.4, as confirmed by Thermogravimetric Analysis (TGA) and Thermogravimetric-Fourier Transform Infrared Spectroscopy (TG-FTIR) analyses. GC-MS confirms the enhanced formation of valuable chemical precursors via co-pyrolysis such as phenols and olefines to 18.67 % and 22.13 % leading to a 63.81 % selective yield of aromatics in the final oil with 10Ni/ZSM-5. Ni modification of ZSM-5 is influential in decreasing PAH formation (7.26 % from 20.37 %), indicating that this two-step process is an effective method for transforming waste into high-quality bio-oil with enriched aromatic content.
研究领域:
环境科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2019
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IF 7.65
Weicheng Xu,Bingxu Chen,Xueding Jiang,Feng Xu,Xin Chen,Limin Chen,Junliang Wu,Mingli Fu,Daiqi Ye
The effect of Ca modification on the Ni/ZSM-5 catalyst for efficient toluene oxidation was studied in a plasma-catalytic system. The Ni/ZSM-5 and Ca-Ni/ZSM-5 catalysts were prepared by a wet impregnation method and characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), Pyridine-FTIR spectroscopy and temperature programmed desorption of ammonia (NH 3 -TPD). Among the catalysts tested, the Ca-Ni/ZSM-5 sample showed the best potential for toluene conversion (90.2%) and CO 2 selectivity (70.7%). Pyridine-FTIR spectra and NH 3 -TPD results proved that the introduction of Ca and Ni onto ZSM-5 caused a decrease in the strong and weak acidic sites. In addition, gas chromatography/mass spectrometry (GC-MS) result showed that the Ca-Ni/ZSM-5 catalyst reduced the production of undesirable byproducts (such as p-nitrotoluene and methyl benzoate). Calcium in the Ni/ZSM-5 system influenced the acidity and other surface characteristic of the catalyst, as well as directly impacting the reactive plasma species and the intermediates. Finally, possible reaction mechanisms in the plasma catalysis of toluene were also proposed.
研究领域:
环境催化
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大气污染控制
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材料化学
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表面科学
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等离子体化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）