FUEL
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2023
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IF 7.4
Yuan Zhang,Yongshuai Wang,Hongyou Cui,Fang Wang,Zhihe Li,Changhua Sun,Yun Jia,Yujiao Xie,Feng Song,Jiangang Wang,Weiming Yi
Co-pyrolysis of biomass with Red Mud was used to boost up the quality of the produced bio-oil and recover iron from Red Mud. The influences of five different biomass species and impregnation pretreatment were investigated. It was found that co-pyrolysis could significantly improve the bio-oil quality, decreasing the acidity from 173.28 to 1.18 mg KOH/g due to the decarboxylation of carboxylic acids into ketones under the catalysis of Red Mud and boosting up the HHV from 20.05 to 31.80 MJ/kg with an energy efficiency of 72.56%. Meanwhile, the soluble alkalinity of Red Mud declined from 65.34 to 5.26 mg HCl/g, which is very crucial to mitigate the harmfulness and perniciousness to the environment. The characterizations of XRD, 57 Fe Mössbauer spectroscopy and XPS confirmed that the weak magnetic Fe 2 O 3 and FeOOH in Red Mud could be completely transformed into stronger magnetic Fe 3 O 4 . For this reason, the magnetic separation iron recovery reached up to 92.25% with iron grade of 66.12%. The findings in the research not only open the avenue for efficient biomass conversion to high quality fuels, but also provide an efficient approach to resourceful utilization of Red Mud.
研究领域:
能源与环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD PROCESSING AND PRESERVATION
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2020
·Vol. 44
·期 4
·e14370
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IF 1.405
Cheng-wei Yu,Qi-rui Hu,Hao-wei Wang,Ze-yuan Deng
The production of rice bran oil is severely impeded because of the rapid rancidity caused by rice bran lipase. Eleven stabilization treatments including 6 heating treatments and 5 nonheating treatments were carried out in this research. Lipase activities as well as oil colors, oil compositions, and contents of vitamin E and γ-oryzanol after different treatments were investigated to evaluate the effect of stabilization and oil qualities. All the treatments had no significant influence ( p > .05) on the oil compositions and γ-oryzanol contents. Among six heating treatments, autoclaving had the best stabilization effect for 10.73% lipase activity remained and other heating treatments held about 30%–35% lipase activities residual except dry heating (68.88%). Heating treatments except steam heating resulted in the significant decreases ( p < .05) of oil acid values and significant increases ( p < .05) of peroxide values, meanwhile six heating treatments increased oil colors. Among five nonheating treatments, ultraviolet irradiation for 18 hr and extreme low temperature (−80°C) for 72 hr were found 57.08% and 58.85% lipase activities residual, respectively. Peroxide value was significantly increased ( p < .05) only by ultrasound. All nonheating treatments had little effect ( p > .05) on oil acid values and color. In conclusion, ultraviolet irradiation might be a potential, convenient, and energy-saving stabilization method with high oil quality. Practical applications Rice bran has a potential for producing about 8 million tons of rice bran oil worldwide but nearly 90% rice bran was wasted every year. The processing of rice bran is impeded because of the rancidity caused by lipase, so the stabilization of rice bran is very important. This research provided a new and time-saving method for evaluating stabilization efficacy instead of long time storage. Using this new evaluating method, 11 stabilization methods were compared and methods like microwave, extrusion, and ultraviolet irradiation were considered to be suitable methods for industrial processing. In additional, ultraviolet irradiation was found to be a potential, convenient, and energy-saving stabilization method without influencing oil quality and nutrient content.
研究领域:
食品科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2022
·
IF 6.437
Xin Jin,Lunjing Yan,Beibei Cui,Jiao Kong,Meijun Wang,Liping Chang,Frederik Ronsse,Weiren Bao
The carbon material prepared by co-pyrolysis of biochar and caking coal has been proved that it acts in catalytic conversion of volatiles and could be used in a granular bed duster as filter medium due to its high abrasive resistance in the coal pyrolysis technology. In this work, inactive carbon material loaded by nickel (Ni/ICM) was prepared by pyrolysis of the blend of biochar ion exchanged with nickel and caking coal, and then was steam activated obtaining activated carbon material loaded by nickel (Ni/ACM). The study investigated the in-situ catalytic conversion process of coal pyrolysis volatiles over Ni/ICM and Ni/ACM in a continuous pyrolysis downer-bed reactor. The physical and chemical properties of Ni/ICM and Ni/ACM, pyrolysis product distribution and the component of tar were analyzed, especially, the coke suspended in tar (Coke-S) was separated from tar and characterized in detail. Results show that the crystallite size of Ni and NiO in Ni/ICM is about 5–7 nm, and that is slightly larger in Ni/ACM. Compared to Ni/ICM, more nickel species, pores, acid sites, oxygen-containing functional groups and carbon defects are contained in Ni/ACM. The yields of tar and light tar (boiling point below 360 °C) are higher over Ni/ICM than over Ni/ACM. Ni/ICM further improves the tar quality compared to ICM, and the content of light oil in tar increases from 22.0 wt% over ICM to 30.6 wt% over Ni 3.2 /ICM. The highest light oil yield is obtained over Ni 1.9 /ICM as 3.6 wt% and the lowest pitch yield is obtained over Ni 3.2 /ICM as 3.5 wt%. The characterization of Coke-S shows that it is composed of large aromatic clusters crosslinked by oxygen and fine ash particles. The large aromatic clusters, as heavy component in tar, are found that its H/C molar ratio increases and condensation degree decreases over Ni/ICM and Ni/ACM in comparison with ICM and ACM, respectively, which also means that the quality of tar is improved. Besides, the oxygen in the tar may have been transferred to the coke.
研究领域:
能源化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
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2023
·
IF 8.3
Jing Gao,Yang Cao,Tao Wu,Yujiang Li
In this study, roasted spent HDS ash (sHDSc-A) was used for the first time to catalytically pyrolyze oily spent HDS catalysts (sHDSc) to improve the yield and quality of pyrolysis oil. The results showed that sHDSc-A promoted the decomposition of coke in oily sHDSc, resulting in the recovery of more oil and gas. Meanwhile, sHDSc-A significantly improved the quality of the pyrolysis oil. They inhibited the aromatization of alkanes to increase the saturation of the pyrolysis oil from 59.39% to 74.25% and the H/C radio from 1.62 to 1.72; promoted the decomposition of long-chain alkanes to increase the content of C11–C22 from 41.97% to 61.99%; enhanced the conversion of carboxylic acids to ketones led to the reduction of heteroatomic compounds such as N (56.10%–45.39%), S (66.95%–56.59%), and O (45.26%–26.70%) in the pyrolysis oil. The promotion of sHDSc-A in the pyrolysis process is attributed to the catalytic effect of the metal oxides in sHDSc-A. Among them, Al 2 O 3 and Fe 2 O 3 can promote decarboxylation of carboxylic acids and reduce O mobility, while MoO 3 and Fe 2 O 3 play a significant role in reducing coke and increasing pyrolysis oil. NiO can also promote methane vapor reforming, and thus increase the production of H 2 in non-condensable gas. This study achieves self-circulation of oily sHDSc with a “waste-treatment-waste” strategy that presents the advantage of value-added energy recovery and waste reuse.
研究领域:
化学工程
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环境科学
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能源回收
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2024
·
IF 6
Hongyu Wu,Li Zhang,Ruiguo Cui,Chuxuan Zhang,Man Xu,Weiwei Liu,Mengshi Wang,Ruijie Liu,Long Xu,Lijun Song
This study evaluated the effects of screw pressing temperature (40 °C–200 °C) on the yields, physicochemical properties, oxidation stabilities, and antioxidant activities of apricot kernels oil (AO). Additionally, this study comparatively analyzed the functional properties of different apricot kernels protein isolates (APIs). The oil yield ranged from 30.06% to 49.07% with AO-200 showing the highest yield. Compared with cold pressing, high-temperature pressing significantly increased the trace components (such as total phenols, tocopherols, and phytosterols), oxidation stabilities, and antioxidant activities of AOs. High-temperature pressing also increased the functional properties of API. Multivariate analysis revealed that spiral pressing at 120 °C may be an optimal strategy for obtaining high-quality oil and protein isolate from apricot kernels. These findings provide a theoretical basis for the extraction and application of AO and API.
研究领域:
食品科学
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农业工程
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Hai-long Zhang,Chang-e Yang,Jing Du,Jun-bo He,Wei-nong Zhang
The aim of this study was to explore the detoxification effect and mechanism of montmorillonite (MMT) modified with quaternary ammonium salts (QAS) on zearalenone (ZEN) in corn oil. Therefore, the characteristics and adsorption behavior of MMT before and after QAS modification were analyzed using scanning electron microscopy (SEM), nitrogen adsorption–desorption, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and molecular dynamics simulations. The results showed that hexadecyl dimethyl benzyl ammonium chloride modified MMT (H-MMT) was an excellent adsorbent for removing ZEN from corn oil and the maximum adsorption amount of H-MMT (0.469 mg/g) for ZEN was 21.9 times that of MMT. This might be attributed to the numerous amounts of intercalation between MMT layers caused by QAS, which changed the appearance of MMT, increased the hydrophobicity, adsorption site, contact number and interaction energy of MMT with ZEN in corn oil. Adsorption experiments indicated that adsorption process of QAS modified MMT on ZEN was mainly chemical adsorption. Notably, H-MMT could not only remove pigment and ZEN in corn oil, but also improve oil quality by decreasing peroxide value and acid value. Therefore, H-MMT could be used as a potential adsorbent for the removal of ZEN from vegetable oil.
研究领域:
食品科学
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化学工程
·
环境科学
✓ 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）