BIOMASS & BIOENERGY
·
2023
·
IF 6
Wen-jie Cong,Jian Yang,Jianguo Zhang,Zhen Fang,Zheng-diao Miao
Magnetic self-assembly metal-organic frameworks (MOFs) were constructed for the co-production of biodiesel and hydrogen from waste oils. The highly active MOF nanoparticles were synthesized and catalyzed crude glycerol with 126.8% hydrogen yield in subcritical water (350 °C, 5 min). By coupling alkali with MOF-derived carriers, continuous process of fast production of biodiesel (with microwave heating at 90 °C in 15 min, 15:1 methanol/oil molar ratio and 9 wt.% catalyst dosage) and hydrogen (350 °C, 5 min) were achieved with yield of 95.3% biodiesel from waste oil (AV of 3.95 mg KOH) and 102.6% H 2 from crude glycerol by-product, respectively. The nanoparticles were magnetically separated for 5 cycles with 95% biodiesel yield. Subsequently, the deactivated catalyst was used for hydrothermal gasification with 50% increasing in hydrogen yield. Characterization techniques showed active sites of MOF-derived nanoparticles were well dispersed with surface area increased by 3.9 times for highly efficient production of biodiesel and hydrogen. It revealed that MOF materials can be designed to make active catalysts and carriers for loading catalytic sites for biomass conversions to targeted biofuels.
研究领域:
能源与环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Reaction Chemistry & Engineering
·
2021
·Vol. 7
·期 3
·699-710
·
IF 4.239
Xia Jiang,Feng Long,Jiaping Zhao,Peng Liu,Jianchun Jiang,Junming Xu
Molecular structural modification was a critical step for the production of high-quality biofuel. In this study, it was found that catalytic cracking followed by product isomerization is an effective technology to convert waste oil into low CFPP and high-quality biofuel. The detailed catalyst characterization was conducted by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermo-gravimetric analysis (TGA), NH3-temperature programmed desorption (NH3-TPD), H2-temperature programmed reduction (H2-TPR), X-ray photoelectron spectroscopy (XPS), pyridine-adsorbed Fourier-transform infrared spectroscopy (Py-FTIR) and Fourier-transform infrared (FTIR) spectroscopy analysis. With the addition of Ce into the Ni/SAPO-11 catalyst, the occurrence of the hydro-cracking reaction was restrained efficiently, and (20 + 1)% NiCe/SAPO-11 was considered as the optimal catalyst for the hydro-isomerization study. Under the action of the bimetallic catalyst, the isomerization reaction could be carried out at low reaction temperature (340 °C) because of the high olefin content (approximately 43%) in pyrolytic oils. Comparison of physical and chemical properties for the hydro-isomerization of pyrolytic oil catalyzed over NiCe/SAPO-11 and Pt/SAPO-11 was conducted. For the two catalysts, the product fuel revealed excellent properties, which abided by the established EN and ASTM standards.
研究领域:
能源科学
·
催化化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Dongxian Li,Xianzhi Meng,Shenlin Huang,Jia Wang,Jianchun Jiang
Sustainable aviation fuel (SAF) is a promising solution for reducing aviation-related carbon emissions. However, conventional SAF production methods such as waste oil aromatization face challenges like complex processing requirements and the generation of unwanted polycyclic aromatic hydrocarbons (PAHs). This study presents a novel, aromatization-free approach to SAF production by co-upcycling waste oils and polystyrene (PS) plastics. The inherent aromatic ring structures in PS plastics are utilized to directly form aromatic hydrocarbons, bypassing the need for traditional aromatization. A two-stage pressurized fixed-bed reactor was employed, where waste oils and PS underwent co-hydropyrolysis to generate intermediates, followed by gas-phase catalytic hydrogenation. Under optimized conditions (0.15 MPa H 2 , 480 °C for co-hydropyrolysis, 350 °C for hydrogenation, and 5 mg Pd/SBA-15 catalyst), this process yielded 71.0 wt% C 8 -C 16 jet fuel components, with 84.5 % selectivity. In comparison, catalysts with higher acidity, such as Pd/HZSM-5 and Pd/USY, promoted side reactions like cracking, leading to lower liquid yields (35.7 wt% and 18.1 wt%, respectively) and a more complex product mixture. Additionally, Pd/SBA-15 catalyst demonstrated excellent stability, maintaining consistent catalytic performance over 10 repeated cycles, and showed potential for scalability with a variety of waste plastics and oils. The study underscores the feasibility of co-upcycling waste oils and PS plastics, offering an efficient, sustainable pathway to streamline SAF production while reducing the environmental impacts associated with conventional methods.
研究领域:
能源科学
·
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
FOOD AND AGRICULTURAL IMMUNOLOGY
·
2018
·
IF 2.568
Jiajia Sun,Liqiang Liu,Shanshan Song,Gang Cui,Hua Kuang
The problem of waste oil is a food safety issue that requires urgent resolution. In this study, a novel hapten was designed for the rapid detection of capsaicinoids, a marker of waste oil, and a monoclonal antibody (MAb) 5D7 was generated that is specific for three major capsaicinoids: capsaicin (CPC), dihydrocapsaicin (DCPC), and N-vanillylnonanamide (N-V). The half maximal inhibitory concentrations of MAb 5D7 for CPC, DCPC, and N-V were 1.12, 0.8, and 0.87 ng/mL, respectively. An immunochromatographic strip test based on MAb 5D7 was established for these three capsaicinoids, with visual inspection limits of <1.0 ng/mL, which satisfies the requirement for the rapid on-site inspection of waste oil.
研究领域:
食品安全
·
免疫学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 2
·51484
·
IF 3.125
Xin Qi,Yu Guo,Qianlin Chen,Xiaohan Zhao,Xianquan Ao
Slow-release fertilizers (MSRFs) are effective in improving fertilizer utilization and reducing environmental fertilizer pollution. In this study, polyvinyl alcohol (PVA) was modified with kitchen waste oil (KWO) and grafted with urea to prepare a urea MSRF. FTIR, Scanning electron microscopy, X-ray diffraction and water contact angle were used to study the MSRF structure and properties. The effects of the nitrogen content on its properties were also investigated through release performance and degradation behavior evaluation and plant experiments. The results showed that the oil-based polyalcohol-modified PVA (OPMPVA) solution prepared from KWO had good compatibility with the urea-modified compound hydroxylurea, and the prepared MSRF had good hydrophobicity, degradation and slow-release properties. The nutrient release period reached more than 20 days, and the degradation rate after 30 days reached 10.2%. Plant experiments showed that the MSRF prepared in this research has good application potential, and the utilization of nitrogen nutrients was improved.
研究领域:
农业科学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yaoyao Zhu,Yeqiang Lu,Hang Yu,Guojun Jiang,Xueting Zhao,Congjie Gao,Lixin Xue
Super-hydrophobic F-TiO 2 @PP membranes were developed from polypropylene (PP) non-woven fabric by in situ cross-linking polymerization of trifluorofluorooctyl methacrylate (FOMA) and sol–gel-derived titanium dioxide with vinyltriethoxysilane (VTES). Due to the formation of super-hydrophobic “coral”-like synapses on the filamentous surfaces of PP non-woven fabric, F-TiO 2 @PP membranes showed extremely high water contact angles up to 157° and capability of rapidly absorbing oil drops. The F-TiO 2 @PP membranes were also able to expel water from water-in-oil emulsions with robustly high oil permeate fluxes (up to 11,000 L m −2 h −1 under gravity), water removing efficiency (up to 99.7%), re-usability and long-term stability even at the presence of surfactant and salts. Such superior performance could lead to potential applications in rapid collection and efficient purification of recovered oily organic components from waste liquids or accidental oil discharges in marine or continental situations.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Songlong Jiao,Lei Liu
Photocatalytic degradation is a potential method to solve pollution caused by waste lubricating oils. In this work, vertically aligned MoS2 layers are grown on Ti3C2 via hydrothermal method and the influence of the friction time on its photocatalytic performance was studied. The results show that friction benefits the improvement of the efficiency of catalytic degradation because of the change of photocatalysts’ morphology caused by the shear force and pressure from rubbing pair, which generates more active sites. MoS2@Ti3C2 nanohybrid with friction time of 60 min has the best photocatalytic performance in terms of waste oil (liquid paraffin) and methyl orange removal of 80.5 and 98%, respectively. The Schottky junction between Ti3C2 and MoS2 and the heterojunction between MoS2 and TiO2 can prolong the recombination time of electron–hole pairs and widen the absorption range of the visible light, which play a key role in the excellent photocatalytic activity of the MoS2@Ti3C2 nanohybrid.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ENERGY
·
2020
·
IF 8.848
Wen-Jie Cong,Yi-Tong Wang,Hu Li,Zhen Fang,Jie Sun,Hai-Tong Liu,Jie-Teng Liu,Song Tang,Lujiang Xu
Biodiesel was directly one-step produced from waste oils without pretreatment catalyzed by a solid base alkalized from spent bleaching clay (SBC) ash. Optimized conditions were obtained with 99.1% biodiesel yield from soybean oil with an orthogonal design. The base catalyst was stable within 8 cycles (>95% biodiesel yield) and resistant to saponification (AV = 9.7 mg KOH/g, 96.5% biodiesel yield). The base was characterized with XRD, EDX-mapping, FT-IR, XRF and TPD, and it had similar strong basicity to Na 2 SiO 3 (0.21 vs. 0.22 mmol/g for Na 2 SiO 3 ) with active sites of Na 2 O and CH 3 ONa evolved from Na 2 SiO 3 and NaAlSiO 4 by reactions of NaOH with oxides (e.g., SiO 2 , Al 2 O 3 ) in SBC ash. Furthermore, the base was magnetized with magnetism of 6.86 emu/g by carbonizing residual oil in SBC as carbon support and reductant (of Fe 2 O 3 to magnetic Fe 3 O 4 particles). It catalyzed soybean oil to produce biodiesel with 99.2% yield and blended oil (AV = 5.9) to biodiesel with 91.9% yield without any saponification. The catalyst was magnetically separated and reused for 3 cycles with 87% yield. The non-magnetic base could also efficiently catalyze actual SBC oil for the production of biodiesel with 95% yield at AV of 10. This work realized the full use of inorganics in SBC, and its oil for direct biodiesel production at a low temperature (i.e., 65 vs. 120 °C with sulfuric acid process) without wastes produced and results can easily find practical applications for waste oils.
研究领域:
能源科学
·
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2022
·Vol. 98
·期 1
·66-76
·
IF 3.709
Yuan Xue,Xueling Zhao,Hong Yuan,Hui Li
Background An efficient sulfonic acid-type acid catalyst with high acid site density based on hydrothermal carbon microspheres (HCMs) has been developed. The reaction by which double bonds in the HCMs were oxidized to generate carboxyl groups was evaluated based on density functional theory calculations. Results Sulfonic acid-type HCMs (SHCMs) were prepared from HCMs through a three-step process comprising oxidation, amidation and sulfonation. An analysis of the oxidation process indicated that the formation of carboxyl groups involved the activation of O 2 molecules and C H bonds, the cleavage of CC bonds, the homolytic fission of peroxy acids and the coupling reactions of H • radicals. The formation of numerous carboxyl groups on the HCM surfaces was the key to obtaining SHCMs with a high acid density of 14.5 mmol g −1 . Conclusions The SHCMs obtained exhibited good catalytic performance during the transesterification of waste frying oil with methanol. Reactions performed using a methanol/oil molar ratio of 9:1 at 90 °C for 5 h gave a fatty acid methyl ester yield of 85.56%. © 2022 Society of Chemical Industry (SCI).
研究领域:
催化化学
·
理论计算
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 27
·期 3
·2599-2621
·
IF 2.914
Xiao Dingtian,Yu Zhifeng,Qing Shan,Du Shunlin,Xiao Huaqiang
In this paper, a complete biomass composite processing system based on agricultural waste powders, recycled plastics, and waste oil is proposed. The wood-colored wallpaper, the green wallpaper, and the blue wallpaper are produced by this processing system. These wallpapers are new products with low cost, high added value, and environmental friendliness. These wallpapers have also been systematically tested. Based on the analysis of test results, a 3D model of material formation mechanism, liquefaction filling technology, and hybrid network model construction technology are obtained. The experiment found the reasonable RLDPE and RLLDPE ratio (1:0.26), the reasonable ratio of biomass to specialty solvents (1:1.5), the reasonable dose of the solid dye (3%), and the reasonable concentration of dye solutions. Wood-colored bio-composite wallpaper products have a smooth surface, wood color (ΔE = 36.7), natural aroma, and good comprehensive mechanical properties (tensile strength 9.255 MPa; elongation at break 20.998%; Young’s modulus 2229.475 MPa). The processing system and wallpaper products in this article not only promote the plastic recycling economy and sustainable agricultural development but also provide new channels for the development of waste oil reuse and new ideas for the development of high value-added biocomposite materials.
研究领域:
材料科学
·
环境科学
·
生物质工程
✓ 已验证
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2023
·
IF 3.3
Guo Zhijin,Liang Xuezheng
The novel porous polymer-based solid acid was synthesized via the polycondensation of 1,4-dichloroxylene (DCX) and following sulfonation using chlorosulfonic acid. The polymer structure could be adjusted by introducing naphthalene. The extremely high surface area of 816 m 2 /g and organic framework provided the mass transfer efficiency and hydrophobic surface. The abundant aromatic rings owned enough sulfonation sites, which resulted in high acidity over 2.7 mmol/g. The novel porous polymer-based solid acid showed high activities for the tetrahydropyranylation of alcohols with the yield over 90% in 5 min at room temperature using 1 wt.% catalyst. The novel solid acid could be recycled for 13 times. The efficient procedure for biodiesel synthesis from waste oil on mild condition was also developed using the solid acid. Both the free fatty acids and glycerides were transformed to the biodiesel products with the yield over 99%. The high surface area, high acidity and the organic framework were the key factors for the high activities, which hold great potential in green chemistry.
研究领域:
催化化学
·
绿色化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2019
·Vol. 27
·期 2
·429-440
·
IF 1.947
Wang Yunjie,Yuan Hong,Zhang Zhi,Ke Yihu
A series of ordered mesoporous S 2 O 8 2−/ ZrO 2 –SiO 2 (OMSZS) solid superacids with different calcination temperatures (400–650 °C) was synthesized using zirconium n-propoxide and tetraethyl orthosilicate as the raw materials and P123 as a structure-directing agent by solvent evaporation-post-dipping method. Transmission electron microscopy and small-angle X-ray diffraction results showed that the OMSZS were all ordered. The nitrogen adsorption results indicated that the specific surface area of OMSZS could reach up to 331–385 m 2 /g, whereas the average pore diameters were in the range of 3.1–3.2 nm. The pyridine infrared results mainly displayed Lewis acids, and the ammonia (NH 3 )-temperature programmed desorption characterization showed that the NH 3 desorption of the OMSZS calcined at 550 °C was 61 cm 3 /g STP. The catalytic performance of the OMSZS was investigated by the transesterification reaction of waste frying oil and methanol. The yield of fatty acid methyl ester could reach up to 94% at 200 °C reaction temperature for 6 h. After repeated use for four times, the catalyst still featured good activity and the yield was 78%.
研究领域:
材料科学
·
催化化学
✓ 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）