RENEWABLE ENERGY
·
2022
·
IF 8.634
Wei Lv,Xiaohong Hu,Yuting Zhu,Ying Xu,Shijun Liu,Peili Chen,Chenguang Wang,Longlong Ma
Herein, the catalysts of ruthenium and molybdenum oxide nanoparticles supported on activated carbon (AC) were synthesized by precursor stepwise impregnation and employed for the hydrodeoxygenation (HDO) of lignin oil. The XRD, TEM, XPS and NH 3 -TPD-MS result of RuMoO x /AC catalysts confirm that the method of loading molybdenum precursor before ruthenium precursor is advantageous for the MoO x and Ru nanoparticles high dispersion and the reduction of MoO x species enhance the amount of acidity of catalyst. Meanwhile, the reduction temperature of RuMoO x /AC-1-T catalysts could effectively regulate the MoO x species that determine the activity and product distribution of HDO. The conversion of aromatic monomers/dimers were up to 96% with high selectivity of hydrocarbon over RuMoO x /AC-1-350 catalyst at 160 °C and 30 bar H 2 . Which is attributed to the MoO 3 and Ru species possess the excellent activity of benzene ring deep hydrogenation, ether bond breaking and acid dehydration. The RuMoO x /AC-1-350 catalyst effectively converted lignin oil (from the depolymerization of cornstalk hydrolysis residue) into hydrocarbons (56.9 wt%) and cyclohexanol/ethers (18.7 wt%) under 280 °C and 3 bar H 2 . The durability of the RuMoO x /AC-1-350 catalyst for HDO of lignin oil was also investigated and showed that the RuMoO x /AC-1-350 catalyst had good stability, regenerability and repeatability.
研究领域:
催化化学
·
能源化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Yufeng Ma,Yu Bei,Meng Zhang,Fei Song,Feilong Hu,Zhimin Kou,Lihong Hu,Yonghong Zhou,Puyou Jia
Woody oil is extracted from the fruits or seeds of woody plants . Preparing woody oil based and biodegradable plasticizer via solvent-free Diels-Alder reaction can reduce plasticizer enrichment and pollution, as well as dependence on petrochemical resources. Herein, woody oil based plasticizer (TOP-Ⅰ and TOP-Ⅱ) were successfully synthesized from renewable woody oil via solvent-free Diels-Alder reaction. Chemical structure of TOP-Ⅰ and TOP-Ⅱ was characterized with 1 H NMR, Biodegradation of TOP-Ⅱ was investigated in active soil and digestive system of Tenebrio molitor . Degradation products were extracted from active soil and Tenebrio molitor feces, the results showed that TOP-Ⅱ experienced biodegradation and formed degradation components with low molecular weight substances. The insect degradation of bio-based plasticizers was first reported and provided an effective way to reduce plasticizer enrichment and pollution. In addition, TOP-Ⅰ and TOP-Ⅱ was used to replace petroleum-based and non-degradable dioctyl phthalate (DOP) in plasticized poly(vinyl chloride) (PVC). The obtained plasticized PVC with TOP-Ⅰ and TOP-Ⅱ showed improved thermal stability, aging resistance, plasticization and solvent extraction resistance, the related mechanism behind these performances were also explored.
研究领域:
化学工程
·
环境科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Zhi Yang,Bowen Luo,Riyang Shu,Zhipeng Tian,Yu Kang,Ying Chen
An effective binary catalyst by using tungstic acid (H 2 WO 4 ) and Ru/C was employed for the hydrodeoxygenation (HDO) of phenolic compounds and raw lignin-oil. H 2 WO 4 was presented as solid at ambient temperature, but it dissolved at high temperature above 100 °C and therefore functioned as an active homogeneous catalyst. This phenomenon resulted in a temperature-controlled phase-transfer behavior in the HDO of phenolic compounds. An efficient HDO performance and an exceptional reusability for guaiacol HDO were presented by this bifunctional catalyst, which can be reused more than 10 times with guaiacol conversion and cyclohexane selectivity over 90%. The comparison of traditional liquid organic and mineral acids, as well as solid acids, with H 2 WO 4 confirmed the outstanding catalytic performance of H 2 WO 4 and highlighted the advantages of H 2 WO 4 as a homogeneous catalyst. Besides guaiacol, other phenolic compounds including various monomers and dimers all exhibited good HDO results, with 100% conversion and cycloalkanes selectivity. Moreover, the raw lignin-oil can be efficiently deoxygenated under the catalysis of this bifunctional catalyst. 99.3% content of hydrocarbons was obtained in the upgraded lignin-oil, which was promising to be used as fuel directly. This catalytic system has great potential for the industrial application of lignin-oil upgrade.
研究领域:
化学工程
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Huihui Gao,Xiankun Wu,Yaowen Hu,Mang Wu,Wei Liu,Zhongkai Wang
Although tremendous efforts have been made to convert woody oils into valuable chemicals, most of the known protocols still require multi-step procedures and rigorous conditions. Herein, a highly efficient method for converting woody oils into long-chain unsaturated dicarboxylic acid was reported. Such a strategy holds promises for opening new routes for utilizing woody oils. Firstly, self-metathesis of fatty acids from Rubber seed oil (RSO), Sapium sebiferum oil (SSO) and High oleic Canola oil (HOCO) were optimized. Pure E -octadec-9-enedioic acid monomer (C18) was obtained, and confirmed by 1 H NMR and FTIR spectra. The prepared dicarboxylic acid was then experienced condensation polymerization with 1,6-hexamethylenediamine. The chemical structures of the obtained polyamides were investigated by FTIR and 13 C NMR spectra. DSC , TGA, DMA, and tensile testing was used to explored their thermal and mechanical properties. Interestingly, due to the existence of broad melting and glass transition, the prepared polyamides possess multiple-shape memory properties.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2024
·
IF 9.3
Shan Jiang,Riyang Shu,Anqi Wang,Zhuoli Deng,Yuhong Xiao,Jiajin Li,Qingwei Meng,Qian Zhang
High-quality liquid biofuels can be produced from renewable lignin-derived phenolic compounds through the efficient hydrodeoxygenation (HDO) process, in which the traditional catalysts usually include metal site and acid site that catalyzes hydrogenation and deoxygenation procedures respectively. This work presented a novel acid-free NixMoyN/C catalyst from the perspective of green chemistry, providing a new pathway for HDO of lignin-derived phenolic compounds that involves hydrogenation, deoxygenation and hydrogenolysis at the same time. A series of NixMoyN/C catalysts were prepared by varying Ni and Mo molar ratio, where the Ni1Mo3N/C catalyst showed the best HDO performance. Guaiacol was completely converted at 260 °C after 4 h, with 95.8% cyclohexane selectivity. And a small amount of benzene can be obtained as a valuable fuel additive by-product by altering the conventional HDO reaction path. By shortening the reaction time, benzene can be obtained as the intermediate products with a relative high selectivity. Based on the characterizations of XRD, BET, SEM, TEM, XPS, H2-TPD and EPR, the results demonstrate that the multiple active components of Ni1Mo3N/C catalyst allow it to efficiently catalyze the hydrogen activation and C-O bond cleavage even under acid-free condition. The existence of the active phase of Ni, Ni2Mo3N and β-Mo2C, as well as the interaction between Ni and Mo metals, contributes together to achieve an efficient HDO performance. Not only for the various phenolic model compounds, the feasibility of Ni1Mo3N/C catalysts for upgrading raw lignin-oil was also demonstrated, with the hydrocarbon content increasing from 5.7% to 88.4%. Notably, arenes account for 18.2% in the hydrocarbon products, which confirms the occurrence of hydrogenolysis in the catalytic process. This work provides a novel route for the conversion of lignin-derived phenolic compounds to the production of high-quality hydrocarbon liquid biofuels, especially the direct production of arene component.
研究领域:
化学工程
·
催化
·
可再生能源
·
绿色化学
✓ 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）