FUEL
·
2018
·
IF 4.908
Liang Shen,Fanfei Min,Lingyun Liu,Jinbo Zhu,Changguo Xue,Chuanchuan Cai,Wei Zhou,Chao Wang
Fossil fuel depletion, environmental concerns, and steep hikes in the price of fossil fuels make it imperative to develop alternative and renewable products to decrease oil products consumption in coal flotation process. Pyrolysis product of the waste cooking oil was proposed as a potential coal flotation collector in this paper. The gas chromatograph-mass spectrometer test and thermogravimetric method were used to study the properties of the waste cooking oil. The pyrolysis product of the waste cooking oil was used as coal flotation collector in two different ways. Thermogravimetric analysis showed that the pyrolysis of the waste cooking oil sample was mainly divided into three processes. The waste cooking oil pyrolysis product possessed strong collecting ability and better selectivity, and can replace diesel as a coal flotation collector. 79% combustible matter recovery was obtained in the presence of 1 kg/Mg DW-450 °C dosage compared with that of 68% in the presence of diesel. Better flotation results can be obtained in the presence of gaseous pyrolysis products of the waste cooking oil. With the increase of pyrolysis temperature of the waste cooking oil, the combustible matter recovery of the concentrate is increasing, while the ash content of the concentrate is showing a decreasing trend.
研究领域:
能源与燃料
·
环境科学
·
矿物加工工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 16
·13365-13370
·
IF 3.289
Weina Zhao,Yuan Xue,Peng Ma,Wenfei Ma,Jieni Wang,Deli Lu,Sheng Han
This study was conducted to improve the cold flow properties of biodiesel obtained from waste cooking oil. The fuel properties of biodiesel blends with 0# diesel in 10 vol% (B10), 20 vol% (B20), 30 vol% (B30), 40 vol% (B40), and 50 vol% (B50) were determined. Mixed cold flow improver (CFI) was composed of ethyl acetoacetate (EAA), iso-decyl methacrylate (EHMA) and iso-octyl methacrylate (IOMA) in various proportions. The fuel properties of B50 with mixed CFIs were also determined. Binary mixed CFIs performed the best improvement on cold flow properties of B50. With the blending of 2.5 vol% EAA and 10 vol% IOMA, the CFPP and PP of B50 with CFI were decreased by 11 °C and 12 °C, respectively, with respect to neat biodiesel. In addition, density, water content, kinematic viscosity, flash point, acid value, oxidation stability, and calorific value of formulated B50 were also determined. All the fuel properties of formulated B50 satisfied the GB19147-2009 (III) and GB19147-2013 (IV) for −10# automobile diesel fuels.
研究领域:
能源科学
·
化学工程
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产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2020
·
IF 3.612
Shilei Ding,Fuwei Li,Zhixia Li,Hongchang Yu,Caifeng Song,Deyuan Xiong,Hongfei Lin
Waste cooking oil (WCO) and stearic acid (SA) were considered to be renewable and readily available bio-oil resources to produce bio-fuel via catalytic hydrodeoxygenation. The most often used catalysts for hydrodeoxygenation were the vulcanized NiMo catalysts, however, the vulcanized catalysts tend to deactivate due to the loss and oxidation of sulfur upon treating bio-oil with high oxygen content. Therefore, it is necessary to develop sulfur-free catalysts. In present study, the reduced NiMo catalysts were prepared by loading Ni and Mo on different supports (γ-Al 2 O 3 , HZSM-5, β-zeolite, activated carbon and bentonite) using incipient-wetness impregnation method, and followed by H 2 reduction. The effects of the properties of supports (acidity, porosity) and H 2 reduction on the dispersity and valence state of metal components were investigated. The hydrodeoxygenation activities of the reduced catalysts were evaluated by catalytic WCO and SA. It was found that when Ni 2+ was loaded on a slightly acidic supports such as γ-Al 2 O 3 and activated carbon, Ni 2+ was easier to be reduced, and aggregate to form larger particles. When Ni 2+ was loaded on a strongly acid supports e.g. HZSM-5, β-zeolite or bentonite, Ni 2+ was more difficult to be reduced but could uniformly disperse on the supports. The aggregated Ni atoms could promote the formation of C17, while the dispersed Ni atoms could promote the formation of C18. γ-Al 2 O 3 supported catalyst achieved the highest SA (97.9%) and WCO (80%) conversion under the mild reaction conditions of 300 °C and 2 MPa H 2 for 3 h, exhibiting the superior catalytic activity.
研究领域:
能源化学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH-PART A-CURRENT ISSUES
·
2018
·
IF 2.706
Fan He,Yuanxin Tian,Zhenlin Xu,Lin Luo,Jinyi Yang,Hong Wang,Yuanming Sun,Qingfeng Du,Yudong Shen
Phthalate acid esters (PAEs) contamination raised concerns as a result of migration from food packaging and environmental exposure. Because of the adverse effects of PAE reported in humans, the aim of this study was to examine the ability to screen for the detection these chemicals as an indicator of potential exposure. Too develop a sensitive screening test to determine PAE, a specific polyclonal antibody against phthalic acid (PA), the hydrolysate of PAEs, was used as a marker of total PAEs. This method involved the use of 4-aminophthalic acid (APA) as an immunizing hapten to generate antibody. Subsequently, this antibody conjugated with labeled gold nanoparticles (GNPs) was then used to develop an immunochromatographic assay (ICA) for visually detecting PA. After establishing optimal assay conditions, the ICA strip detected visually PA at 3 μg/ml rapidly in less than 5 min. Further, this assay exhibited reliable specificity for PA with no apparent cross-reactivity with structurally related PAEs. A significant correlation between data obtained with the ICA strip and high-performance liquid chromatography (HPLC) analysis was achieved using cooking oils as model spiked samples. The proposed use of ICA offers an effective tool for rapid on-site screening for total PAEs in cooking oils.
研究领域:
食品科学
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免疫学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
Atmospheric Pollution Research
·
2022
·
IF 4.831
Zhanghua Liu,Jianbing Su,Aojuan Ma,Aixue Zhu,Pengyan Liu
In this study, the following 5 kinds of tracer pollutants of cooking oil fumes were selected: palmitic acid , stearic acid , cholesterol, stigmasterol and β-sitosterol, and an effective method of their extraction, separation, enrichment and determination was established considering the conditions of the low-altitude exhaust and the condensation of cooking fumes. Five tracer pollutants were determined both in the PM 2.5 and gas phases from college canteen exhaust and in waste oil condensed from fumes of different edible oils in households. It was found that the amount of palmitic acid was higher than that of stearic acid in the same sample; the emission characteristics of 5 substances in condensed grease samples from different oils varied considerably; compared with palmitic acid and stearic acid, 3 sterols (cholesterol, stigmasterol and β-sitosterol) are more characteristic as tracers of cooking oil fumes. The results provide technical and methodological references for the contribution and traceability analysis of catering source exhaust in air pollution source apportionment .
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2024
·
IF 9
Yanchao Liu,Weijiong Dai,Lichen Zhang,Jiajun Zheng,Yanze Du,Xiwen Zhang,Tong Zhang,Bo Qin,Ruifeng Li
The conversion of waste cooking oil into biodiesel can bring about dual benefits: alleviating environmental pollution and realizing waste recycle. Embryonic zeolite has highly accessible acid sites because of the partially formed or more open zeolitic structure, which can solve problems such as diffusion limitation and inaccessible acid sites that the traditional zeolite catalysts face in the process of macromolecular reactants. In this work, a series of embryonic Beta zeolites were prepared by using mesoporous SBA-15 as a self-sacrificial silica source via a solid-state transformation strategy. NH 3 -TPD and FT-IR pyridine adsorption confirm that Brønsted acid sites have been created in these amorphous form embryonic catalysts. The diffusion property of toluene obtained by a zero-length column method proved that the higher the zeolization degree, the greater the diffusion activation energy. The synergistic effects resulted from the combination of the ordered mesoporous structures (ranging from 2 to 10 nm) stemming from the SBA-15 substrate and the moderate acid sites (∼88 μmol g −1 ) offered the embryonic SBEA-3 catalyst with remarkable catalytic performance for ≥95 % conversion during 20 times cycling tests and more than 90 % methyloleate yield.
研究领域:
化学工程
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环境科学
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2022
·
IF 3.475
Xiaoxia Ye,Zhihao Wu,Min Wang,Yuancai Lv,Xiaodan Huang,Yifan Liu,Chunxiang Lin
The printing ink on the plastic surface will greatly reduce the quality of recycled plastic products. In this work, quaternary ammonium-modified waste cooking oil (WCOEQ) was fabricated using waste cooking oil, epichlorohydrin, and trimethylamine aqueous solution as raw materials, through ring-opening esterification and quaternary amination reaction. The synthesis conditions of WCOEQ were optimised, and the structure and properties of WCOEQ were characterised by Fourier transform infrared spectroscopy, zeta potential, and 1H NMR. Furthermore, WCOEQ had excellent emulsifying performance, low kraft point, low critical micelle concentration value, good foaming, and stability, which could effectively reduce the surface tension of water, showing application potential in the field of plastic deinking. Importantly, compared with the waste cooking oil without deinking effect, the WCOEQ had an excellent deinking performance on the ink on the plastic surface, and the deinking efficiency could be improved by increasing the concentration of the deinking agent, the deinking temperature, and prolonging the pre-soaking and stirring time. The results of atomic force microscope, energy-dispersive spectroscopy, optical photos, and Leica microscope showed that the roughness changed significantly and the ink molecules were gradually peeling off. This work highlighted the potential of quaternary ammonium-modified waste cooking oil for excellent removal of printing inks on the plastic surface.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers of Chemical Science and Engineering
·
2024
·Vol. 18
·期 12
·1-9
·
IF 4.3
Xu Yang,Guo Xuan,Wang Meng,Fang Yunming
The characterization of bio-aviation fuel composition is paramount for assessing biomass conversion processes and its suitability to meet international standards. Compared with one-dimensional gas chromatography mass spectrometry (1DGC-MS), comprehensive two-dimensional gas chromatography with mass spectrometry (GC × GC-MS) emerges as a promising analytical approach for bio-aviation fuel, offering enhanced separation, resolution, selectivity, and sensitivity. This study addresses the qualitative and quantitative analysis methods for both bulk components and trace fatty acid methyl ester (FAME) in bio-aviation fuel obtained by hydrogenation at 400 °C with Ni-Mo/ γ -Al 2 O 3 &Meso-SAPO-11 as catalyst using GC × GC-MS. In bulk composition analysis, C 12 concentration was highest at 25.597%. Based on GC × GC-MS analysis platform, the quality control method of FAME in bio-aviation fuel was established. At the split ratio of 10:1, limits of detections of six FAMEs were 0.011–0.027 mg·kg −1 , and limits of quantifications were 0.036–0.090 mg·kg −1 , and the GC × GC-MS research platform had the ability to detect FAME from 2 to 5 mg·kg −1 . The results showed that this bioaviation fuel did not contain FAME.
研究领域:
能源科学
·
分析化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 44
·期 14
·11564-11582
·
IF 3.741
Wei Liu,Hong Yuan
Summary Hydrogen is considered an ideal energy carrier. However, the use of fossil fuels to produce hydrogen depletes natural resources and causes environmental problems. Therefore, there is an urgent need to find alternative raw materials and technologies for the production of hydrogen. Waste cooking oil (WCO) is a renewable energy source that has emerged as a potential raw material for hydrogen production. This study describes the production of hydrogen and carbon nanotubes (CNTs) by catalytic cracking of a WCO model compound (WCOMC) performed in a lab-scale fixed bed using Ni-Co/SBA-15 catalysts. The phase, structure and reduction properties of the catalyst were analysed by using different characterisation methods. The effects of the nickel-cobalt metal content and the reaction temperature on both the hydrogen production and the quality of the CNTs were investigated. The deposited carbonaceous products were characterised to analyse their external appearance, internal structure, oxidation stability and graphitisation degree. The results indicated that the catalyst containing 20% Ni and 30% Co showed the highest activity. When reaction temperature was 800°C, the instantaneous volume fraction of hydrogen was close to 43.5 vol% and the content of hydrogen in the gas product was close to 66.5 vol%. A few multi-walled CNTs having a small diameter and some CNTs with an open-topped structure were deposited on 10%Ni-40%Co/SBA-15 and 30%Ni-20%Co/SBA-15, respectively. Thermogravimetric analysis and Raman spectroscopic analysis indicated that all CNTs showed high oxidation stability and a high degree of graphitisation.
研究领域:
能源科学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Siyu Pan,Jun Yan,Xu Peng,Zhou Xu,Qi Zeng,Zhonghui Wang,Minzhong Zhao,Yi Chen
In the poly(vinyl chloride) (PVC) industry, waste cooking oil (WCO)-derived epoxidized fatty acid methyl esters (EFAMEs) represent a promising bio-alternative to conventional ortho-phthalate plasticizers that are being phased out due to their toxicity and nonrenewable nature. However, to improve the leaching resistance of EFAMEs, the WCO feedstock has to go through multistage distillation at particularly high temperatures under vacuum conditions for saturated component removal, resulting in intensive energy consumption, a significant waste of the feedstock, and a final bioplasticizer with a still faster leaching rate than those of ortho-phthalates. Here, we report a strategy that can Y-shape all components in WCO-derived EFAMEs with another short, polar ester chain via a nucleophilic substitution reaction of the feedstock mixture with dimethyl carbonate. This strategy entails no utilization of an energy-intensive procedure and, importantly, converts all components in the WCO feedstock into the final bioplasticizer. Relative to ordinary EFAMEs, the Y-shaped epoxidized fatty acid methyl diester exhibits a significantly suppressed leaching rate. Under certain scenarios, it even leaches at a rate equivalent to or slower than that of di-(2-ethylhexyl) phthalate (DEHP), the most ubiquitously applied member of the ortho-phthalate family. With this strategy in hand, the renewable WCO may be converted into a high-performance bioplasticizer in an energy-efficient and atom-economic manner to support the phase-out of ortho-phthalates in the PVC industry.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 56
·45575-45581
·
IF 3.84
Jieni Wang,Weina Zhao,Yani Ai,Hongyan Chen,Leichang Cao,Sheng Han
Complementary blending of biodiesel from waste cooking oil (BWCO) with diesel from direct coal liquefaction (DDCL) was evaluated to improve the fuel properties. The fuel properties of the biodiesel blends with the addition of 0%, 2.5%, 5%, 10%, and 20% DDCL (vol) were determined. It indicated that blending complemented the individual deficiencies and superiorities of the two fuels. The oxidative stability and cold flow properties of BWCO were strongly improved. Simultaneously, the flash point and kinematic viscosity of DDCL were also enhanced. With the blending of 20 vol% DDCL with BWCO, all the main fuel properties of the blends were in accordance with EN 14214 and ASTM D6751. The fuel properties of DDCL–BWCO after storage for 100 days were also determined. In addition, variance analysis was performed using IBM SPSS Statistics to clarify the effect of adding DDCL on the fuel properties of BWCO.
研究领域:
能源科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2023
·
IF 3.4
Guoliang Zhang,Haoyu Liu,Sen Fu,Hong Yuan
BACKGROUND A series of ZSM-5@KIT-6 composite molecular sieve catalysts was prepared by encapsulating ZSM-5 as a substrate in the mesoporous material KIT-6. The intent was to use these catalysts to promote the catalytic cracking of a waste cooking oil model compound (WCOMC) to produce light olefins. RESULTS The morphology, structural characteristics and acidity of each of the resulting catalysts were characterized by X-ray diffraction, transmission electron microscopy, N 2 -Brunauer–Emmett–Teller (N 2 -BET) surface area analysis and temperature-programmed ammonia desorption. The results showed that ZSM-5 was successfully coated with KIT-6. The BET surface areas of these catalysts ranged from 345 to 792 m 2 g −1 and the specimens had average pore sizes in the range of 2.37–5.51 nm. Total acidity increased with increases in the mass-based proportion of ZSM-5 in the material. CONCLUSION The catalytic cracking of WCOMC was studied in a lab-scale fixed-bed apparatus. Trials at a reaction temperature of 600 °C using the material having a mass-based ZSM-5 proportion of 80.0% (ZK-80) gave the highest gas-phase yield of light olefins of 43.8%. After 6000 min, the catalytic performance of this material remained stable, demonstrating a resistance to carbon deposits. The superior activity of the present composite catalysts can be ascribed to improvements in pore structure and acid strength distribution. © 2023 Society of Chemical Industry (SCI).
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
危险品化学品经营许可证（带存储）