Catalysts
·
2023
·Vol. 13
·期 3
·539
·
IF 3.9
Yuhao Chen,Mengli Li,Zhuang Xu,Guowang Shen,Xugeng Wang,Bin Dai
In this study, novel Zn catalysts were prepared by the wet impregnation method using printing and dyeing wastewater (PDW)-modified petroleum coke (petcoke) as a carrier, and they were applied to the acetylene acetoxylation. The pretreated petroleum coke has a high specific surface area which provides sufficient space for the loading of Zn. Calcination further increases catalyst activity, but when calcination temperatures exceed 1000 °C, a significant loss of Zn occurs, resulting in a dramatic decrease in catalyst activity. This enables the conversion of acetic acid up to 85%. X-ray photoelectron spectroscopy confirmed that a large amount of N is introduced into PC from PDW, which changes the electron transfer around Zn. Temperature-programmed desorption (TPD) analysis revealed that the nitrogen-doped Zn(OAc)2catalyst enhanced the catalytic activity by modulating the intensity of the catalyzed adsorption of acetic acid and acetylene. This study provides a new way to reuse petroleum coke and printing and dyeing wastewater to support the sustainable development of the vinyl acetate industry.Keywords:wastewater;petroleum coke;vinyl acetate
研究领域:
催化化学
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环境科学
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工业化学
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2014
·
IF 6.16
Mingbo Wu,Yue Wang,Wenting Wu,Chao Hu,Xiuna Wang,Jingtang Zheng,Zhongtao Li,Bo Jiang,Jieshan Qiu
Here we report a new strategy for preparation of water-soluble photoluminescent carbon quantum dots (CQDs) from petroleum coke . Petroleum coke was oxidized first in mixed concentrated H 2 SO 4 and HNO 3 , and then functionalized by hydrothermal ammonia treatment. The as-made CQDs and nitrogen-doped CQDs (N-CQDs) were characterized by UV–Vis absorption spectroscope, fluorescence spectroscope, transmission electron microscope, atomic force microscope , Raman spectrometer, X-ray powder diffractometer, X-ray photoelectron spectroscope and Fourier transform infrared spectrometer . The results show that the quantum yield of CQDs increases greatly from 8.7 to 15.8%, and the fluorescent lifetime increases from 3.86 to 6.11 ns after the hydrothermal treatment in ammonia. Moreover, the fluorescent color of N-CQDs can be tuned through the amount of doped nitrogen. Both CQDs and N-CQDs are water-soluble, and have uniform particle distribution, strong luminescence, and highly fluorescent sensitivity to pH in a range of 2.0–12.0. The uniform size distribution and nitrogen-doping of N-CQDs help to lead to high yield of radiative recombination , resulting in improved fluorescence properties. This work offers a simple pathway to produce high quality and enhanced photoluminescent CQDs from petroleum coke.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2017
·Vol. 32
·期 7
·1248-1257
·
IF 1.673
Jufeng Huang,Wei Xing,Fazle Subhan,Xiuli Gao,Peng Bai,Zhen Liu,Youhe Wang,Qingzhong Xue,Zifeng Yan
With increasing output of petroleum coke, the value-added exploitation of petroleum coke has become a tough problem. Preparing porous carbons is a traditional way to the value-added exploitation of petroleum coke. Here, we used a facile and efficient hard-templating strategy to synthesize mesoporous carbon with high surface area from petroleum coke. N2 adsorption analyses show that the BET specific area and pore volume of the carbons can reach up to 864 m2/g and 1.37 cm3/g, respectively. To utilize the abundant mesopores of the carbons, anthraquinone-modified mesoporous carbon was tested as an electrode material for supercapacitor applications. Electrochemical measurements demonstrated that the specific capacitance reached up to 366 F/g at the current density of 1 A/g, indicating a promising prospect of using this carbon in electrochemical energy-storage field. More importantly, the strategy used in this work can be easily modified to prepare other nano-carbon materials from petroleum coke.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Dongdong Zhang,Weijun Ma,Jiachuan Wang,Xin Lu,Jie Luo
Porous carbon with well-developed pores and heteroatom-doping is studied extensively in aqueous supercapacitor. However, few studies focus on the construction of hydrophilic capacitive carbon. Herein, interlaminar oxygen bridging assisted alkali activation strategy is proposed to design hydrophilic petroleum coke-based porous carbon (PPC) with oxygen-doping and pore forming via KOH activation oxidized petroleum coke. Due to the low activation temperature and alkali-coke ratio of 1:1, PPC-600 inherits high oxygen content of 14.51 at.% and ordered graphite lattice, and presents low specific surface area of 216 m 2 g −1 and small water contact angle of 6.2°. Electrochemical tests show that PPC-600 delivers a capacitance of 304.7 F g −1 at 0.5 A g −1 higher than PPC-700 (specific surface area of 1030 m 2 g −1 ) about 226.9 F g −1 . CV deconvolution reveals that the high capacitance of PPC-600 is associated with the coupling of surface-controlled and diffusion-controlled, while PPC-700 is mainly contributed by surface-controlled, confirming that interlaminar oxygen can increase the non-double layer capacitances. Furthermore, PPC-600-based aqueous supercapacitor has excellent capacitance retention of 89.7 % and Colombian efficiency about 100 % over 50,000 cycles at 10 A g −1 . These results show that surface heteroatom and hydrophilic engineering are promising strategies to improve the capacitance of porous carbon.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NEW CARBON MATERIALS
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2016
·
IF 0.993
Yue Wang,Wen-ting Wu,Ming-bo Wu,Hong-di Sun,Hui Xie,Chao Hu,Xue-yan Wu,Jie-shan Qiu
Yellow-visual fluorescent carbon quantum dots (CQDs) were prepared from petroleum coke by ultrasonic-assisted chemical oxidation and were used as label-free probes for Cu 2+ detection in water. The detection of Cu 2+ by CQD probes is related to a quenching of fluorescence by a photoinduced electron transfer mechanism. The quenched fluorescence of the CQDs by Cu 2+ can be recovered by adding ethylene diamine tetraacetic acid. The yellow-visual fluorescent CQD probes have a linear detection range from 0.25 to 10 μM, a detection limit of 0.0295 μM, a response time of 3 s, and a superior sensitivity and selectivity for Cu 2+ detection compared to other fluorescent probes. The CQDs are easy to prepare, economical, reusable, fast to respond and can be used in on-line detection.
研究领域:
化学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2023
·
IF 6.9
Wenfu Zhu,Yuqin Wang,Fan Yao,Xiaohong Wang,Haoming Zheng,Guangzheng Ye,Hairong Cheng,Junliang Wu,Haomin Huang,Daiqi Ye
Waste resource utilization of petroleum coke is crucial for achieving global carbon emission reduction. Herein, a series of N-doped microporous carbons were fabricated from petroleum coke using a one-pot synthesis method. The as-prepared samples had a large specific surface area (up to 2512 m 2 /g), a moderate-high N content (up to 4.82 at.%), and high population (55%) of ultra-micropores (<0.7 nm). Regulating the N content and ultra-microporosity led to efficient CO 2 adsorption and separation. At ambient pressure, the optimal N-doped petroleum coke-based microporous carbon exhibited the highest CO 2 uptake of 4.25 mmol/g at 25°C and 6.57 mmol/g at 0°C. These values are comparable or even better than those of numerous previously reported adsorbents prepared by multistep synthesis, primarily due to the existence of ultra-micropores. The sample exhibited excellent CO 2 /N 2 selectivity at 25°C owing to the abundant basic pyridinic and pyrrolic N species; and showed superior CO 2 adsorption-desorption cycling performance, which was maintained at 97% after 10 cycles at 25°C. Moreover, petroleum coke-based microporous carbon, with a considerably high specific surface area and hierarchical pore structure, exhibited excellent electrochemical performance over the N-doped sample, maintaining a favorable specific capacitance of 233.25 F/g at 0.5 A/g in 6 mol/L KOH aqueous electrolyte. This study provides insight into the influence of N-doping on the porous properties of petroleum coke-based carbon. Furthermore, the as-prepared carbons were found to be promising adsorbents for CO 2 adsorption, CO 2 /N 2 separation and electrochemical application.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Fengxin Li,Yan Wang,Fumin Li,Mingqing Hua,Yan Huang,Huifang Cheng,Haibo Wu,Jiacheng Li,Jixing Liu
High-sulfur petroleum coke (HSPC), produced during petroleum coking process, has drawn ever increasing attention in the manufacture of graphite electrodes with the rise of new energy vehicles in recent years. However, its high sulfur content ( S > 3.0 wt.%) has become the major obstacle limiting this promising application. Herein, an innovative method is proposed to effectively lower the content of sulfur in HSPC through a series of polyoxometalate H 11 P 2 W 13 V 5 O 62 (HPA) coupled CeO 2 . The experimental results unveiled that the sulfur compounds in HSPC predominately existed as thiophene and mercaptan sulfur compounds, which could be oxidized to be the corresponding sulphone, sulphoxide and sulphate species. Moreover, the introduction of CeO 2 considerably promoted the dispersion of HPA, thereby exposing more reactive sites for the adsorption and activation of H 2 O 2 to produce active oxygen species, and thereafter endowing x%HPA@CeO 2 ( x = 20∼40) with excellent catalytic oxidative desulfurization (ODS) performance for HSPC. As a result, the sulfur content was significantly reduced from 4.46 wt.% to 2.12 wt.% at 70 °C and reaction time of 4 h due to the coupling effect between HPA and CeO 2 over 30%HPA@CeO 2 . The present study not only provides an innovative technological path for the efficient removal of sulfur from HSPC, but also promotes the understanding of catalytic ODS process of HSPC on the catalyst surface active centers.
研究领域:
化学工程
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zhiyang Zhao,Dongqiang Cai,Juan Liu,Guifu Zou,Qiang Zhang,Zhanlong Song,Cuiping Wang,Longzhi Li
Direct cracking of hydrogen sulfide (H 2 S) can be used to obtain high purity hydrogen (H 2 ), thus avoiding the waste of hydrogen resources by the traditional Krauss process. Microwave-induced discharge of spherical graphitization petroleum coke (PC) was proposed to solve the problem of low efficiency and high energy consumption of H 2 S cracking. The PC was prepared by microwave-assisted desulfurization and metal (Fe, Co) catalytic graphitization to obtain better discharge effect. Subsequently, the graphitized PC was applied to induce microwave discharge, and the effects of graphitization parameters on the discharge performance were discussed. Lastly, the attention was concentrated on multi-effects catalytic decoupling and cracking kinetic properties of microwave-induced discharge for H 2 S cracking. PC with Fe 1 /Co 2 loading exhibited greater graphitization degree ( I D / I G = 1.027) (30.7 % than petroleum coke), brought stronger discharge intensity (initial and ending intensity at 4.08 V and 2.73 V in one-hour), and better discharge stability (67 % after one-hour) compared to PC raw coke. H 2 S cracking through microwave discharge catalysis exhibited a favorable catalytic effect, obtained a complete conversion at the initial stage and remained 95.58 % after one-hour, with H 2 yield of 98.1 %. With Fe 1 /Co 2 loading, H 2 S cracking had the least activated energy, 14.96 kJ/mol, which was the multi-effects of microwave discharge catalysis, thermal-catalysis and Co-catalysis. It was further calculated that discharge-catalysis dominated in H 2 S cracking, with the highest contribution, followed by Co-catalysis, and thermal-catalysis had the lowest contribution.
研究领域:
化学工程
·
能源科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Shiyi Wang,Xiaojing Sun,Longfei Xie,Yujing Ji,Liwen Lu,Yuqing Chen,Haomin Huang,Daiqi Ye
To overcome the worldwide environmental crisis related to the continuous emission of CO 2 , the use of porous organic polymers, which are excellent absorbents and conversion materials, to reduce CO 2 emission is of great significance. Among them, hyper-crosslinked polymers (HCPs) are porous materials with a high pore density that are synthesized using a simple one-pot method that is economical and can realized at a low temperature, hence they have good application prospects as adsorbents for CO 2 . In this study, a batch of petroleum coke-based HCPs with different sulfur contents was prepared via the one-pot Friedel-Crafts alkylation reaction using inexpensive and abundant petroleum coke as raw material. Thereafter, the use of the prepared materials for CO 2 adsorption revealed that the HCPs with a high sulfur content had a larger specific surface area (825 m 2 /g) and showed a higher CO 2 adsorption capacity (2.1603 mmol/g at 1 bar 298 K) than its counterpart with a lower sulfur content. Thus, the presence of sulfur significantly enhanced the CO 2 adsorption performance of the material. Further, the simulation of the heat of adsorption of HCPs with and without sulfur using Material Studio also confirmed the higher CO 2 capture efficacy of HCPs with a higher sulfur content.
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
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-14
·
IF 3.8
Omer Ahmed M.,Eltaweil Abdelazeem S.,Abdelhamed Aly M.,Abd El-Monaem Eman M.,El-Subruiti Gehan M.
Worldwide industrialization has grown at a rapid pace, contaminating water resources, particularly with phenolic pollutants that pose a risk to aquatic systems and human health. The goal of this study is to create an inexpensive magnetic composite that can effectively remove nitrophenol (o-NP) using adsorptive means. In this instance, a nonanyl chitosan (N-Cs) derivative was synthesized and then combined with activated petroleum coke (AP-coke) and magnetic Fe 3 O 4 to boost its adsorbability towards o-NP and to facilitate its separation. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffractometer (XRD), Vibrating sample magnetometer (VSM), X-ray photoelectron spectroscopy (XPS), and zeta potential were employed to characterize the magnetic composite. The experimental results indicated that the Fe 3 O 4 /AP-coke/N-Cs composite possesses a greater affinity toward o-NP with a maximal efficiency reached 88% compared to 22.8, 31.2, and 45.8% for Fe 3 O 4 , AP-coke and N-Cs, respectively. The equilibrium adsorption data coincided with the Langmuir, Freundlich, and Temkin isotherm models, with a maximum adsorption capacity of 291.55 mg/g at pH 6, whereas the pseudo second order kinetic model offered the best fit to the experimental data. Besides, the developed adsorbent preserved satisfactory adsorption characteristics after reuse for five successive cycles. The proposed adsorption mechanism involves the H-bonding, π-π interaction, hydrophobic interactions and electron donor-acceptor interactions. These findings hypothesize that the constructed magnetic composite could efficiently remove nitrophenols from polluted water with high performance and ease-separation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Pen Luo,Zhengjie Chen,Xiuhua Chen,Wenhui Ma,Xiaowei Gan,Rui Xie
Sulfur in petroleum coke poses significant environmental risks and damages equipment and carbon products, making its removal essential. This study presents a method for the desulfurization and modification of high-sulfur petroleum coke through catalytic roasting with reduced iron powder. The experimental results indicated that with a petroleum coke particle size of 75–58 μm, an iron powder-to-petroleum coke mass ratio of 50 %, and roasting at 1400 °C for 1 h, the desulfurization rate reached 87.93 %, reducing the sulfur content to 0.91 wt%, with a product recovery rate of 80.82 %. A series of characterizations of petroleum coke products before and after desulfurization were conducted, revealing that both the desulfurization efficiency and the graphitization performance of petroleum coke were significantly enhanced by the addition of iron powder. Additionally, density functional theory calculations for the pyrolysis of benzothiophene showed that the energy barrier for the pyrolysis process was reduced in the presence of Fe catalysis, theoretically confirming the desulfurization mechanism. The resulting low-sulfur petroleum coke products can serve as raw materials for graphite preparation.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yangyang Wang,Wenzheng Zhu,Guanyu Wang,Caiyun Chen,Wei Xu,Yanjiao Li,Lizhuang Chen,Yingying Chen,Hongxun Yang
Carbon-based materials have excellent conductivity, low cost, and environmental friendliness, making them the primary choice for negative electrode in sodium ion batteries (SIBs). Among them, hard-carbon and soft-carbon as amorphous carbon are considered to have potential as negative electrode for SIBs. However, soft-carbon exhibits a slow charging speed and poor low-temperature performance and hard-carbon behaves a low initial coulombic efficiency, resulting in a key obstacle to their extensive applications in SIBs. Herein, a new N/O co-doping soft-hard carbon nanofiber (PCNF) composite was prepared by electrospinning with heat treatment method, petroleum coke (PC) as soft-carbon and oxygen source and polyacrylonitrile (PAN) as hard-carbon and nitrogen source. The optimal PCNF-800 carbonization at 800 °C delivers an enhancement capacity of 296.1 mAh g −1 at 25 mA g −1 after 100 cycles with the capacity retention of 88.2 %. The excellent electrochemical property is ascribed to the co-doping of N/O in the carbon resulting in the large number of defects which could enhance Na + adsorption and transport, the appropriate interlayer spacing, the porous nanofiber mircostructure, and the synergistic effect between soft and hard carbon. Meanwhile, this study provides a possible new idea for the high-value utilization of petroleum coke.
研究领域:
材料科学
·
能源存储
✓ 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）