COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Yan Wang,Wenpei Feng,Jinjun Li,Zhixiong You
Hydroxy double salts (HDSs) have shown enormous potential for removing dyes from wastewater. However, the powder form of HDSs limits their potential in commercial applications. Herein, we proposed a facile one-step route to incorporate CuZn-HDS into the copper alginate matrix for methyl orange removal. This strategy could not only shape CuZn-HDS to beads but also significantly enhance the adsorption ability of the matrix. The obtained composite hydrogel beads displayed high water stability and excellent adsorption performance for MO, with more than 98% of MO being removed by CuZn-HDS/Alg-0.5. The maximum adsorption capacity of CuZn-HDS/Alg-0.5 for MO was 763.3 mg·g −1 at 298 K. Besides, the adsorption process matched the pseudo-second-order kinetic model and fitted well with the Freundlich model, suggesting that the adsorption of MO onto CuZn-HDS/Alg-0.5 was a multilayer chemical adsorption process. More importantly, CuZn-HDS/Alg-0.5 could selectively adsorb MO from MO & RhB (Rhodamine B) and MO & MB (Methylene blue) mixed solution. Mechanism studies indicated that the removal of MO was attributed to the electrostatic interaction, complexation interaction and ion exchange interaction between MO and CuZn-HDS/Alg-0.5. This work opens a new route for developing eco-friendly and efficient adsorbents to remove dyes from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Shan Yu,Yingying Ning,Jiaju Xu,Ruoxi Yang,Dan Zhao
The study used the mannanase-producing Lactobacillus casei HDS-01 as the probiotic component and combined it with konjac powder, which contains konjac glucomannan (KGM), to create a synergistic synbiotic. The aim was to investigate its probiotic potential and the changes in gut microbiota and short-chain fatty acids (SCFAs). The results indicated that KGM selectively stimulated the growth of L. casei HDS-01, confirming their synergistic effect. The survival rate of L. casei HDS-01 at pH levels of 2.5–5.5, bile salt concentration of 0–0.35 g/L, and NaCl concentration of 1–8 g/L reached more than 55 %, suggesting that L. casei HDS-01 can survive in the gastrointestinal tract. Furthermore, the colonisation ability of L. casei HDS-01 in the intestinal tract was significantly enhanced by KGM. The antidigestive property of konjac oligo-glucomannan (KOGM) in gastric juice was better than that of inulin, with 94 % of KOGM expected to reach the jejunum of the small intestine after entering the human digestive system. In vitro fecal fermentation results indicated that the L. casei HDS-01-KGM synbiotic effectively promote the proliferation of gut SCFAs-producing bacteria (2.43 × 10 8 CFU/mL) and increase SCFAs production. The contents of acetic acid (7.68 ± 0.04 μg/mL), propionic acid (6.72 ± 0.03 μg/mL) and butyric acid (4.37 ± 0.06 μg/mL) were higher than those of the other treatment groups. Meanwhile, L. casei HDS-01-KGM synbiotic could enhance the population of beneficial bacteria, such as Pediococcus while significantly reducing harmful bacteria, such as Shigella . These results demonstrate the synergistic effect of L. casei HDS-01-KGM synbiotic and establish the foundation for its application in the food industry
研究领域:
食品科学
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微生物学
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胃肠病学
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生物技术
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营养学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS COMMUNICATIONS
·
2016
·
IF 3.389
Dapeng Liu,Anjie Wang,Chenguang Liu,Roel Prins
Bulk Ni 2 P and Al 2 O 3 -supported Ni 2 P were prepared at low phosphidation temperature (300 °C) from Ni 9 S 8 and NH 4 H 2 PO 2 , which were separated to avoid the formation of phosphate inside the support pores. The unsupported product phases were characterized by XRD and the Ni 2 P/Al 2 O 3 catalysts by XRD, BET and TEM. A 10 wt.% Ni 2 P/Al 2 O 3 catalyst, made by the Ni(NO 3 ) 2 –NiO–Ni 9 S 8 –Ni 2 P path at a P/Ni ratio of 3, showed the highest activity in the hydrodesulfurization of dibenzothiophene. By separating the nickel and hypophosphite sources, Ni 2 P/Al 2 O 3 catalysts could be obtained at low phosphidation temperature and with low degree of blockage of pores by surplus phosphorus.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haoran Yu,Shuo Liu,Ali Yaraş,Linchao Hu,Wenyi Zhang,Mingguo Peng,Hasan Arslanoğlu,Qingqing Huang,Bolormaa Oyuntsetseg,Bingying Gao,Linqiang Mao
Spent hydrodesulfurization (HDS) catalyst contains considerable amounts of Mo, Ni and V, is an important secondary resource for these valuable metals. Direct acid solution leaching method exhibits poor separation effect from catalyst carrier for Mo due to greater stability of MoS 2 . This study explored Mo leaching efficiencies from spent HDS catalyst by Fenton-like oxidation systems (H 2 O 2 and K 2 S 2 O 8 ), which were frequently employed in the wastewater treatment. To further improve Mo leaching efficiency, nano zero-valent iron (nZVFe) was used to activate H 2 O 2 /K 2 S 2 O 8 and produce more free radicals (·OH and ·SO 4 - ). Approximate 96.0 % and 93.3 % of Mo were leached from spent HDS catalyst in nZVFe + H 2 O 2 + H 2 SO 4 and nZVFe + K 2 S 2 O 8 + H 2 SO 4 systems under optimal experimental conditions, increased by 16.2 % and 8.2 % than normal H 2 O 2 (79.8 %) and K 2 S 2 O 8 (85.1 %) system without nZVFe. The leaching process of Mo in both nZVFe + H 2 O 2 + H 2 SO 4 and nZVFe + K 2 S 2 O 8 + H 2 SO 4 systems conformed to the shrinkage core model. Kinetic analysis and molecular calculation demonstrated the leaching process of Mo in nZVFe + H 2 O 2 + H 2 SO 4 system was driven by chemical reaction and solid film diffusion, and the leaching and oxidation reactions of MoS 2 occurred simultaneously. However, the leaching process of Mo in nZVFe + K 2 S 2 O 8 + H 2 SO 4 system was driven only by chemical reaction, solid MoS 2 was firstly dissolved into Mo 4+ by H + , and then oxidized into Mo 6+ by ·SO 4 - . The economic and environmental impacts evaluation indicated that the separation of Mo from spent HDS catalysts by nZVFe + H 2 O 2 + H 2 SO 4 was assigned as a better choice than normal H 2 O 2 and K 2 S 2 O 8 system without nZVFe due to higher leaching efficiency and lower cost.
研究领域:
化学工程
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环境科学
✓ 已验证
DOI
高影响因子
Petroleum Science
·
2023
·
IF 5.6
Shui-Sen He,Ting-Ting Huang,Chao Chen,Yu Fan
A H 2 O 2 etching strategy was adopted to introduce coordinatively unsaturated sites (CUS) on MoS 2 -based catalysts for dibenzothiophene (DBT) hydrodesulfurization (HDS). The CUS concentrations on MoS 2 slabs were finely regulated by changing the concentrations of H 2 O 2 solution. With the increasing H 2 O 2 concentrations (0.1–0.3 mol/L), The CUS concentrations on MoS 2 slabs increased gradually. However, the high-concentration H 2 O 2 etching (0.5 mol/L) increased the MoO x S y and MoO 3 contents on MoS 2 slabs compared to etching with the H 2 O 2 concentration of 0.3 mol/L, which led to the less CUS concentration in the sulfided Mo–H-0.5 catalyst than in the sulfided Mo–H-0.3 catalyst. A microstructure-activity correlation indicated that the CUS introduced by H 2 O 2 etching on MoS 2 slabs significantly enhanced DBT HDS. Different Co loadings were further introduced into Mo–H-0.3, which had the most CUS concentration, and the corresponding 0.2-CoMo catalyst with the highest CoMoS content (3.853 wt%) exhibited the highest reaction rate constant of 6.95 × 10 −6 mol g −1 s −1 among these CoMo catalysts.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Chen Wen,Ligang Chen,Yating Xie,Jingying Bai,Xin Liang
In order to explore the effect of Fe doped CoP nanosheets on both hydrogen evolution reaction (HER) and hydrodesulfurization (HDS), FeCoP/C nanosheets have been successfully synthesized by the solvothermal process with Fe doped ZIF-67/C for the growth of FeCo-hydroxides nanosheets , as well as a following low-temperature phosphorization process. The performance evaluation results show that the FeCoP/C nanosheet exhibits an excellent acidic HER performance and an ordinary HDS performance compared to CoP/C and FeP/C catalysts. Experimental characterization and density functional theory results show that the high HER activity of the FeCoP/C nanosheet can be attributed to the fact that the nanosheet structure facilitates the exposure of active sites and the doped Fe atoms make CoP have a suitable hydrogen adsorption energy , while the ordinary HDS activity of the FeCoP/C nanosheet can be attributed to the fact that the doped Fe atoms can inhibit the cleavage of C–S bonds by CoP.
研究领域:
材料科学
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催化
·
能源材料
·
化学工程
✓ 已验证
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Zhe Bai,Luyao Wang,Hongwei Cao,Xiangwen Zhang,Guozhu Li
Hydrodesulfurization (HDS) is an effective way to reduce sulfur content in oil for the enforcement of more stringent environmental regulations. MoS 2 has been widely used as an effective component for catalyzing HDS, and needs to be extensively studied in depth. Herein, MoS 2 nanoflowers with the symbiosis of 1T-2H phases in the basal planes and coexistence of S and Mo vacancies are prepared via the assembly of many nanosheets by a one-pot solvothermal method. The morphology, crystal phase structure and defects of these 1T-2H MoS 2 samples were well characterized. The 1T/2H ratio and the state of vacancies were effectively tuned by changing the solvothermal conditions. Active and stable 1T-2H mixed MoS 2 nanoflowers with high content of 1T phase and moderate S and Mo vacancies were obtained by the regulation of oxalic acid in the mixture of ethanol and water. In the HDS of dibenzothiophene at 300 °C and 4 MPa, the optimal catalyst of MoS 2 -water–ethanol-OA exhibited a substrate conversion of 89.3% in 10 h. Moreover, the activity of MoS 2 -water–ethanol-OA was well retained without any decrease in the recycling experiment.
研究领域:
催化
·
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Pengcheng Wang,Jun Liu,Guo Liu,Peiwen Xu,Xinzhen Feng,Weijie Ji,Yulan Gao,Chak-Tong Au
In this work, we studied how the oxidic CoMoO x /Al 2 O 3 and sulphurated CoMoS x /Al 2 O 3 interfacial structures determine catalytic efficiency in selective hydrodesulfurization (HDS) of dibenzothiophene (DBT). To achieve this goal, we first synthesized the γ-Al 2 O 3 materials of unique morphologies through the ionic liquid-assisted hydrothermal process under different conditions. The resulting γ-Al 2 O 3 hexagonal plates (HP) and stacked hexagonal plates (SHP) are single crystallites with the dominant (1 1 0) and (1 1 1)/(1 0 0) facet structures, respectively; whereas the Al 2 O 3 rods show polycrystalline feature. Through impregnation of Mo/Co salts of different loadings, the various CoMoO x precursors were generated on the different Al 2 O 3 facets owing to the distinct interaction: mostly the two-dimensional (2D) poly-/mono-meric MoO x species together with the three-dimensional (3D) MoO 3 on the Al 2 O 3 (1 1 0) facet vs. the quasi 2D polymeric MoO x species on the Al 2 O 3 polycrystalline facet. Such structural difference further affected the sulfidation of the MoCoO x as well as the quantity of active MoCoS x entities on different γ-Al 2 O 3 supports: 10Mo3CoS x /Al 2 O 3 -HP had the highest level of MoCoO x sulfidation thus a much higher fraction of MoS 2 plus Co 9 S 8 /CoMoS species whereas less quantity of partially sulphurated CoMoO x S 2 /CoO x together with SO x 2- species. All the distinct interfacial domains of the sulphurated catalysts reasonably account for significantly different efficiency in HDS of DBT. Surface MoS 2 /CoMoS/Co 9 S 8 species of the highest content over the Al 2 O 3 (1 1 0) facet correspond to the highest DBT areal conversion rate and TOF value, owing to the enhanced MoS 2 -Co 9 S 8 and MoS 2 -CoMoS conjunction and synergism.
研究领域:
催化
·
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Sustainable Metallurgy
·
2026
·
IF 3.5
Yang Han,Wang Jing,Jiang Yue,Wu Hang,Zhou Chaohui,Pang Junbao,Zhou Jianchao,Yu Yuhang,Xu Wei
Spent hydrodesulfurization (HDS) catalysts are valuable secondary resources for recovering critical metals such as tungsten (W) and molybdenum (Mo). This study proposes a new pressurized oxygen-enriched sodium salt leaching process to enhance the recovery efficiency of W and Mo. By optimizing roasting parameters and leaching conditions, the leaching efficiencies of 94.1% for W and 99.5% for Mo were achieved. The synergistic combination of sodium salt roasting and pressurized oxygen leaching effectively converted refractory sulfides into soluble tungstate and molybdate ions. The results revealed that sodium salts promoted the formation of porous oxide intermediates during roasting, and pressurized oxygen facilitated oxidative dissolution of metal phases. The process not only addresses environmental risks associated with spent catalyst disposal but also contributes to sustainable metal recovery, aligning with circular economy principles. Graphical
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·123212
·
IF 7.5
Zhiyu Wang,Mingyuan Liu,Binying Gao,Linqiang Mao
The recovery of high value metals from spent hydrodesulfurization catalysts serves as a crucial strategy not only for mitigating environmental pollution but also for alleviating resource shortages. Herein, a hydrated deep eutectic solvent (P-DES) composed of betaine hydrochloride and p-toluenesulfonic acid was developed to selectively leach valuable metals from spent catalysts and enable their stepwise recovery. Under optimal conditions (BeCl:PTSA = 1:2, 45 wt% H 2 O, 90 ℃, 10 g L −1 , 180 min), leaching efficiencies of 90.03% for Ni, 98.60% for Mo, and 94.98% for V were achieved, while Al dissolution was suppressed to 9.82%. Density functional theory (DFT) and leaching kinetics both indicate an apparent metal release order of Mo > V > Ni, which is also consistent with the observed order of leaching efficiency (Mo > V > Ni). Independent Gradient Model based on Hirshfeld partitioning (IGMH) results show that P-DES features a Cl - -centered hydrogen-bond network, which provides a proton-active and chloride-containing microenvironment. During leaching, H + breaks M-O bonds, V(V) is reduced predominantly to V(IV) with minor Mo(VI) reduction, and the dissolved metals are stabilized as chloro or oxychloro species. In the subsequent recovery process, V(IV) was selectively precipitated at pH 5.2 within 3 min and calcined at 450 ℃ to produce V 2 O 5 . Mo was then extracted using an N235/2-ethylhexanol system and recovered as MoO 3 after calcination at 550 ℃. Finally, Ni was precipitated from the raffinate at pH 12.2 as Ni(OH) 2 . The recovery rates of V, Mo and Ni were obtained at 93.36, 97.36, and 89.52%. This work presents an integrated, green hydrometallurgical route for the comprehensive recycling of spent HDS catalysts.
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2019
·
IF 3.021
Butian Xia,Liyuan Cao,Kaiwei Luo,Liang Zhao,Xiaoqin Wang,Jinsen Gao,Chunming Xu
The modified CoMo/γ-Al2O3 catalysts with different Ce and/or P loading were prepared by the incipient wetness impregnation method. The catalysts were characterized using X-ray fluorescence spectroscopy, N2-adsorption–desorption, pyridine Fourier transform infrared, H2 temperature-programmed reduction, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. The effect of Ce and/or P on the active phase, acidic properties, and catalytic activity of the CoMo/γ-Al2O3 catalysts were investigated in detail. The results showed that the phosphorus additive can slightly increase the stacking number of MoS2 slabs by reducing the metal–support interaction. Also, the addition of a small amount of cerium (1.75 wt %) not only increased the average slab length and stacking layer number of MoS2 slabs, but also formed new Brønsted acid sites on the support, which efficiently enhance the thiophene hydrodesulfurization (HDS) and olefins isomerization activity of the catalyst. These favorable effects are more obvious in cases where cerium and phosphorus coexist. The CoMo/γ-Al2O3P(2)Ce(1.75) catalyst exhibited the highest thiophene HDS and olefin isomerization conversion values of 98.58 and 19.51%, respectively. The high isomerization activity is able to inhibit the loss of gasoline octane number. Based on the above results, it can be concluded that the synergistic effect between Ce and P can achieve deep desulfurization and minimize the loss of octane number by modulating the acidity of the support and optimizing the active phase of the sulfided catalysts.
研究领域:
催化化学
·
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）