FUEL
·
2025
·
IF 7.5
Xiaoning Zhang,Buning Chen,Jianwei Wang,Yusheng Zhou,Xueli Huang,He Huang
The high content of heteroatoms and trace metals makes it difficult to upgrade poor-quality oils (PQO). The co-pyrolysis or co-hydrogenation of coal tar (CT)/vacuum residue (VR) is a new approach for the efficient utilization of PQO. The products of CT/VR co-pyrolysis and co-hydrogenation were characterized by RV, TG-FTIR, and GC × GC-TOF. Co-pyrolysis reduces the reaction harshness by lowering the activation energy of pyrolysis. Co-pyrolysis changes the reaction paths of oxygen-containing free radicals by promoting the generation of oxygen-containing organic compounds and inhibiting coke generation by increasing the pyrolysis spillover of unsaturated hydrocarbons. Co-hydrogenation increased the gasoline and diesel yields while reducing coke production. The saturates, aromatics, resins, and asphaltenes of CT and VR experienced a significant increase in the gasoline and diesel fractions after hydrogenation. The gasoline and diesel content enhancement in the four-component hydrogenation products of CT increased with increasing polarity, whereas the opposite trend was observed for the four-component hydrogenation of VR. There was a clear synergistic effect between the aromatics of CT and VR in terms of hydrogenation saturation, while the synergistic effect of the aromatics was somewhat weaker. The saturates and resins had an inhibitory effect on each other.
研究领域:
能源化学
·
石油化工
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2019
·
IF 6.669
Konglong Feng,Zaocheng Huang,Bo Peng,Weijie Dai,Yunqi Li,Xiaoai Zhu,Yunjiao Chen,Xing Tong,Yaqi Lan,Yong Cao
Deacidification of high-acid soy sauce residue (SSR) oil is crucial to utilization of SSR oil. Aspergillus niger lipase (ANL) has been widely applied for such purpose while its immobilization still has large room for improvement. ANL was immobilized onto six different macroporous acrylic resins, accounting the effect of the different textural properties of resins on stability and their potential for application in enzymatic deacidification. The resin MARE with lower porosity, higher bulk density, and medium hydrophobicity, was chosen as the best carrier for the best thermostability and reusability. ANL-MARE is a promising catalyst than Novozym 40086, which not only exhibited higher deacidification activity and good thermostability, but also was continuously reused for 15 cycles and efficiently catalyzed from high-acid SSR oil into diacylglycerol-enriched oil. Therefore, immobilized ANL was a novel, low-cost and recyclable biocatalyst that could be used as a good alternative to higher-cost commercial lipases in industrial applications.
研究领域:
生物化学
·
食品科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2019
·
IF 3.073
Kun Chen,Di Zhang,Yang Dai,He Liu,Zongxian Wang,Ummul-Khairi Ibrahim,Aijun Guo
Suspended particles (SPs) were separated from an FCC Slurry Oil (SLO) via centrifugation with the aid of toluene-dilution. Further solvent extraction of SPs with CS 2 /toluene (50 V/V%) mixed solvent would generate solvent extraction insolubles (SEINS) and solubles (SES). They were sent for a series of chemical and structural characterizations, respectively, in the hope of providing clues to address issues from sedimentation and clarification processes. It was found that SPs were composed of catalyst fragments and organic substances wrapped around them, serving as a shield. The characterizations from TEM and XPS strongly suggested that the outer surface of SEINS was sufficient in oxygen-containing sites (organic functional groups and aluminosilicate), while the outer surface of SPs was not. High oxygen content and almost same nitrogen content of SES, comparable with that of asphaltenes, were detected through XPS characterization. This rationalized the strong adsorption of SES on SEINS in the form of a tedious solvent extraction process. A new structure of SPs has thus been described on the basis of these characterizations. Design sedimentation experiments verified the SPs’ structure. Furthermore, the experiments offered a promising way for acquiring high clarification efficiency with rather low usage of sinking agent through solvent pretreatment.
研究领域:
化学工程
·
材料科学
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产品关联
DOI
高影响因子
Petroleum Science
·
2023
·
IF 5.6
Wei-Wei Feng,Ye-Gui Qian,Ting-Hai Wang,Qing-Yan Cui,Yuan-Yuan Yue,Pei Yuan,Xiao-Jun Bao
To deeply understand the effects of support properties on the performance of Mo-based slurry-phase hydrocracking catalysts, four Mo-based catalysts supported on amorphous silica alumina ( ASA ), γ -Al 2 O 3 , ultra-stable Y (USY) zeolite and SiO 2 were prepared by the incipient wetness impregnation method, respectively, and their catalytic performances were compared in the vacuum residue (VR) hydrocracking process. It is found that the Mo/ASA catalyst exhibits the highest VR conversion among the different catalysts, indicating that both the appropriate amount of acid sites, especially B acid sites and larger mesoporous volume of ASA can enhance the VR hydrocracking into light distillates. Furthermore, Mo catalysts supported on the different supports show quite different product distributions in VR hydrocracking. The Mo/ASA catalyst provides higher yields of naphtha and middle distillates and lower yields of gas and coke compared with other catalysts, it is attributed to the highest MoS 2 slab dispersion, the highest sulfuration degree of Mo species, and the most Mo atoms located at the edge sites for the Mo/ASA catalyst, as observed by HRTEM and XPS analyses. These features of Mo/ASA are beneficial for the hydrogenation of intermediate products and polycyclic aromatic hydrocarbons to restrict the gas and coke formation.
研究领域:
催化化学
·
石油加工工程
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2019
·Vol. 22
·期 1
·44-53
·
IF 9.405
Yajing Duan,Yanglin Liu,Zhaojun Chen,Dong Liu,Enqiang Yu,Xiaodong Zhang,Hui Fu,Jinzhe Fu,Jiatao Zhang,Hui Du
Slurry-phase hydrocracking employing a dispersed catalyst is an efficient technology for the upgrading of residue to clean fuels. The green synthesis of 2D nanosheet hierarchical composites when carrying out some intrinsic functionalities is interesting for both scientific and technological applications. Herein, we present our effort in simultaneously enhancing the residue upgradation and synergistic fabrication of 2D MoS2 nanosheets/carbon hierarchical structures based on amorphous molybdenum sulfide nanocatalysts. The amorphous molybdenum sulfide nanocatalysts (MoSx-AM, x ≈ 2.79) are constructed in an inverse microemulsion system and are then either modified by oleic acid to synthesize oleophilic MoSx nanocatalysts (MoSx-OL) or annealed to obtain MoS2 nanocatalysts with the typical layered structure (denoted as MoSx-AN). Benefiting from the decomposition into 2D MoS2 nanosheets with a length less than 20 nm during the residue slurry-phase hydrocracking, MoSx-AM and MoSx-OL exhibit superior hydrogenation and anti-coke activity compared with MoSx-AN. X-ray photoelectron spectroscopy and density functional theory (DFT) calculation reveal that the residue macromolecules with a polycyclic aromatic structure and heteroatoms show strong interaction with 2D MoS2 nanosheets, which disturbs the formation of a layered-structure of MoS2 and results in isolated 2D MoS2 nanosheets. The generated 2D MoS2 nanosheets with abundant active sites lead to the superior performance in residue slurry-phase hydrocracking. These results demonstrate a dispersed nanocatalyst for slurry-phase hydrocracking and also provide a perspective for the anti-coke of petroleum refining. In particular, this process also enabled the dispersed 2D MoS2 nanosheet/carbon hierarchical structure formation synergistically.
研究领域:
化学工程
·
材料科学
·
催化反应
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Xiaoying Zhai,Weiguo Lin,Jinkai Liu,Xu Chen,Junfeng Yong,Wensheng Yang
The development of earth-abundant electrocatalysts to replace noble metal for oxygen reduction reaction (ORR) has attracts tremendous interest. In this work, Fe, N-codoped porous carbon-embedded Fe 3 C nanoparticles (Fe 3 C/Fe, N-PCR) is fabricated from petroleum vacuum residue via a simple template-assisted and subsequent doping-assisted calcination method. The unique hybrid material shows great features: abundant active sites including pyridinic N, Fe N, and Fe 3 C nanoparticles, a relatively large surface area (509.3 m 2 g − 1 ) and 3D interconnected hierarchical porous structure. The Fe 3 C/Fe, N-PCR as an electrocatalyst exhibits remarkable ORR catalytic activity in alkaline medium, with a high onset potential of 1.02 V and half-wave potential of 0.86 V, which surpass commercial Pt/C (20 wt%) by ca. 30 and 20 mV, respectively. Moreover, Fe 3 C/Fe, N-PCR has outstanding long-term stability and tolerance to methanol poisoning, outperforming Pt/C. Combining with the exciting performance, abundant and cheap raw material, and facile synthetic method, Fe 3 C/Fe, N-PCR catalyst has promising future in ORR. This study also provides a new approach for high value utilization of petroleum vacuum residue.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Qingyang Li,Zhengting Xiao,Hongchuan Xin,Guangci Li,Da Wang,Chao Feng,Xuebing Li,Song Chen,Keng H. Chung
An oil-soluble CoMo 6 heteropolyacid was synthesized by modifying the heteropolyacid with a surfactant dioctadecyl dimethyl ammonium chloride, and then was used to prepare highly active sulfided catalyst. The effect of sulfurization degree on the hydrotreating activity of the catalyst was investigated, and the results show that the incompletely sulfurized catalyst exhibited high reactivity for 4,6-dimethylbenzothiophene (4,6-DMDBT) and vacuum residue (VR). The unusual finding was attributed to more CoMoS species and surface oxysulfides, and the latter were probably generated in the partial replacement of O atoms with S atoms during the sulfurization. The acidic oxysulfides (SO 4 2- groups) not only improved the activation of 4,6-DMDBT but also facilitated the cleavage of C-C bonds of the intermediate product 3,3′-dimethylcyclohexylbenzene according to the reaction data and DFT calculation. Besides, the catalysts with incomplete sulfide state exhibited outstanding catalytic performance on the upgrading of VR. The proposed incomplete sulfurization strategy provided a new way to prepare bifunctional hydrogenation catalysts with both desulfurization and cracking activities.
研究领域:
催化化学
·
石油加工工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2018
·
IF 2.795
Xianni Song,Dong Liu,Bin Lou,Zhiheng Li,Aijun Guo,Dongming Zhang,Luhai Wang
In this study, catalyst particles (the main component is Al 2 O 3 –SiO 2 ) were removed from the fluid catalytic cracking slurry oil by adding a polyacrylamide flocculants (1200 μg/g) and a ammonium citrate aqueous solution weighting agent (10% by weight of the slurry oil) at 95 °C, and then settled for 18 h. The ash content which determined by the muffle stove was considered as a criteria for measuring the efficiency of sedimentation. The size and distribution of the catalyst particles, before and after sedimentation, were analyzed using a laser particle size analyzer and a light transmission microscope. The results showed that the removal efficiency could reach 95.12% when both the flocculants and weighting agent were added. However, either the flocculants or weighting agent applied individually could only obtain inferior removal efficiencies of 87.04% or 68.76%, respectively. It would be attributed to the synergistic effect between the two agents. Moreover, it was also found that the flocs were rapidly formed from original catalyst particles and the flocculants firstly. Then the weighting agent provided assistance for the sedimentation of the flocs, of which the process was identified as the control step. The sedimentation process established in the experiment might play a role in the industrial removal of catalyst particles from slurry oil in the future.
研究领域:
化学工程
·
环境工程
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Marine Science and Engineering
·
2025
·Vol. 13
·期 9
·1713
·
IF 2.8
Aigang Li,Shengjun Guo,Jianwen Deng,Hong Chen,Jinxuan Wu,Ru Jiang,Jing Tan,Lihua Cheng,Libo Zhang,Qinzhen Fan
Addressing IMO 2020 compliance, this study investigates marine fuel oil production from hydrotreated residues, focusing on mitigating excessive total sediment potential (TSP) caused by over-hydrotreatment. This study systematically investigates the impact of blending ratios of Fluid Catalytic Cracking (FCC) slurry oil with Residue Desulfurization (RDS) heavy oil on TSP, colloidal stability, and asphaltene structure evolution. Techniques such as XRD, SEM, and XPS were employed to analyze the structural changes in asphaltenes during the TSP exceeding process. The results indicate that as the FCC slurry oil blending ratio increases, TSP in the blended oil initially rises and then decreases. The peak TSP value of 0.41% occurs at a 10% FCC slurry oil blending ratio, primarily due to high-saturation hydrocarbons in RDS heavy oil disrupting the colloidal stability of asphaltenes in FCC slurry oil. When the blending ratio reaches 25%, TSP significantly decreases to 0.09%, attributed to the solubilizing effect of high aromatic compounds in the FCC slurry oil on the asphaltenes. The ω(Asp)/ω(Res) ratio mirrors the TSP trend, and the colloidal solubilizing capacity of asphaltenes increases with the blending ratio. Asphaltenes in RDS heavy oil exhibit a spherical structure, whereas those in FCC slurry oil show a layered structure. The precipitated asphaltenes in the blends primarily result from the aggregation of asphaltenes in FCC slurry oil, with heteroatoms (N, S, O) mainly originating from RDS heavy oil asphaltenes. During the early stage of blending, TSP formation is dominated by FCC slurry oil asphaltenes, but increasing the aromatic content in the system can significantly reduce TSP. This work provides theoretical and technical support for optimizing marine fuel blending processes in petrochemical enterprises.
研究领域:
石油工程
·
燃料化学
·
胶体与界面科学
·
船用燃料
·
石油化工工艺
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
·
2021
·Vol. 124
·期 4
·2100193
·
IF 2.679
Yonglin Li,Shasha Wen,Yiwen Sun,Na Zhang,Yuan Gao,Xiuzhu Yu
Extra virgin olive oils (EVOO) are vulnerable to adulteration. Thus, a rapid and cost effective screening method is required to detect adulteration. This study develops a method for detecting EVOO adulterated with refined olive pomace oil (ROPO) based on polarity reversal method (PRM). A device is designed based on PRM to determine current of oil sample. Adulteration is detected according to the current difference between EVOOs and ROPOs caused by the content discrepancy of polar compounds. Polar phenolic components are characterized by high performance liquid chromatography-mass spectrometry and Folin–Ciocalteu assay to confirm the principle of the proposed method. Calibration, validation, and blind sample validation is performed. Results showed that current of EVOOs is higher than that of ROPOs due to richer and higher content of polar phenolic compounds. Calibration of 5–90% adulteration with R 2 = 0.997 is established. The R 2 of validation and blind sample validation are close to 1. The relative standard deviation of 5–90% adulterated samples and ROPO is 4.76%, indicating good accuracy and precision. Practical Applications : The proposed method can obtain adulterated ROPO content by simply referring the calibration curve of current within 10 min without pretreatment, which can be used in quick test for industry and retailers.
研究领域:
食品科学
·
分析化学
·
质量控制
✓ 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）