4.7 Article

High-efficiency recycling of Mo and Ni from spent HDS catalysts: Enhanced oxidation with O2-rich roasting and selective separation with organic acid leaching- complexation extraction

Related references

Note: Only part of the references are listed.
Article Environmental Sciences

Feasibility of bioleaching integrated with a chemical oxidation process for improved leaching of valuable metals from refinery spent hydroprocessing catalyst

Ashish Pathak et al.

Summary: Bioleaching combined with chemical oxidation showed potential in improving the leaching of valuable metals (Mo and V) from spent hydroprocessing catalysts. The bioleaching yield was relatively low in the decoked spent catalyst due to the presence of metals in stable fractions. The integration of a second stage chemical oxidation process significantly improved the leaching yield in the coked spent catalyst.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2022)

Article Metallurgy & Metallurgical Engineering

Comprehensive recovery of metals in spent Ni-Mo/γ-Al2O3 hydrofining catalyst

Yuanyuan Cai et al.

Summary: This study proposed a technical route for the comprehensive recovery of valuable metals from spent Ni-Mo/γ-Al2O3 hydrofining catalysts, optimized the process conditions, and achieved good economic and environmental benefits. The use of specific extraction systems and precipitation agents enabled high separation efficiencies for Al, Mo, and Ni, realizing the comprehensive recovery of metals in the spent catalyst.

HYDROMETALLURGY (2022)

Article Metallurgy & Metallurgical Engineering

Features and mechanisms of self-sintering of molybdenite during oxidative roasting

Hu Sun et al.

Summary: Roasting experiments were conducted to investigate the self-sintering behaviors of MoS2 during oxidation. The study found that the desulfurization efficiency of MoS2 decreased with increasing roasting temperature, and a sintered layer primarily composed of MoO2, Mo4O11, and MoO3 was formed during the roasting process.

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA (2022)

Article Chemistry, Physical

CoNi nano-alloys modified yolk-shell structure carbon cage via Saccharomycetes as carbon template for efficient oxygen evolution reaction

Guangyao Hou et al.

Summary: A CoNi nano-alloys modified yolk-shell carbon cage catalyst was synthesized through a green synthesis method, exhibiting outstanding OER activity and stability, providing a new strategy for constructing catalysts for renewable energy systems.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Metallurgy & Metallurgical Engineering

Stepwise separation and recovery of molybdenum, vanadium, and nickel from spent hydrogenation catalyst

Rongrong Chen et al.

Summary: Recovering metal values from hazardous spent hydrogenation catalysts is of vital importance for both economic and environmental reasons. This study demonstrates the successful selective recovery of valuable molybdenum (Mo), vanadium (V), and nickel (Ni) from spent hydroprocessing catalysts using a sulfuric acid leaching-stepwise extraction process. The process shows high leaching efficiency and selectivity.

HYDROMETALLURGY (2022)

Article Chemistry, Organic

Stability, atomic charges, bond-order analysis, and the directionality of lone-electron pairs on nitriles and isocyanides

Xueli Cheng et al.

Summary: This study investigates the global molecular electrostatic potential minima and related properties in nitrile and isocyanide molecules using computational and molecular simulation methods. The results show that the directionality of lone pairs influences the electrostatic distribution in the molecules. The study also analyzes and discusses the related chemical properties.

JOURNAL OF PHYSICAL ORGANIC CHEMISTRY (2022)

Article Chemistry, Physical

3D interconnected porous Mo-doped WO3@CdS hierarchical hollow heterostructures for efficient photoelectrochemical nitrogen reduction to ammonia

Muhammad Asim Mushtaq et al.

Summary: In this study, low-cost Mo-doped WO3@CdS porous hollow microspheres were synthesized and demonstrated as efficient catalysts for reducing gaseous N-2 into ammonia. The Mo-doping and interconnected porous heterostructures provide sufficient catalytic sites for effective photoelectrocatalytic N-2 reduction.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Green & Sustainable Science & Technology

High-efficiency recycling method for Mo and Ni from spent catalyst via soda roasting and solvent extraction

Bingying Gao et al.

Summary: A high-efficiency recovery method for Mo and Ni from spent Mo-Ni/Al2O3 catalyst via soda roasting and solvent extraction was developed, achieving efficient separation and enrichment of Mo and Ni. The proposed method is simple, with a high recovery rate and high selectivity.

JOURNAL OF CLEANER PRODUCTION (2022)

Review Green & Sustainable Science & Technology

A review of metallurgical processes and purification techniques for recovering Mo, V, Ni, Co, Al from spent catalysts

Xin Liang et al.

Summary: The recovery of valuable metals from spent catalysts has become a focus of research due to industrialization and depleting ore resources. Among the three methods - hydrometallurgy, pyrometallurgy, and pyro-hydrometallurgy - pyro-hydrometallurgy seems to be the best choice as it combines the advantages of both pyrometallurgy and hydrometallurgy. It retains selectivity to metals like nickel and iron, reduces processing difficulty, and has high purity and selectivity when separating and purifying the leached valuable metals, making it a noteworthy technology.

JOURNAL OF CLEANER PRODUCTION (2022)

Article Chemistry, Physical

The mechanistic difference of 1T-2H MoS2 homojunctions in persulfates activation: Structure-dependent oxidation pathways

Jia-Cheng E. Yang et al.

Summary: This study investigated the mechanistic difference of 1 T-2H MoS2 homojunctions in catalytic activation of peroxymonosulfate (PMS) for degrading butyl paraben (BPB), finding that PMS/1 T-2H MoS2 showed higher performance in BPB removal, with (OH)•-induced BPB removal being the top priority for both PMS/1 T-2H MoS2 and PDS/1 T-2H MoS2. The different activation pathways and reactive species resulted in varying BPB removal, by-product distributions, and toxicity.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Chemistry, Physical

Unveiling the role of surface P-O group in P-doped Co3O4 for electrocatalytic oxygen evolution by On-chip micro-device

Xunbiao Zhou et al.

Summary: During oxygen evolution reaction, the introduction of P-O groups in newly formed oxides can effectively promote the metal-oxygen covalency, accelerating electron transfer and enhancing catalytic activity. A planar electrochemical microdevice based on thin-film catalyst was designed to explore the electric conductance evolution of transition metal phosphides or partially phosphatized oxides during electrochemical activation, offering new insights into the dynamic behavior of energy materials.

NANO ENERGY (2021)

Article Chemistry, Physical

Singlet oxygen triggered by robust bimetallic MoFe/TiO2 nanospheres of highly efficacy in solar-light-driven peroxymonosulfate activation for organic pollutants removal

Chencheng Dong et al.

Summary: This study constructed bimetallic MoFe/TiO2 nanospheres, which showed superior performance in degrading organic pollutants under simulated solar light. Photo-generated electrons and transition metallic redox couples played vital roles in the PMS activation process. Different from traditional SR-AOPs, sulfate radicals, hydroxyl radicals, and peroxymonosulfate radicals indeed participated in the generation of singlet oxygen.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Chemistry, Inorganic & Nuclear

Exploration of N-oxo pyridine 2-carboxamide ligands towards coordination chemistry, solvent extraction, and DFT investigation for the development of novel solvent for lanthanide and actinide separation

Debasish Das et al.

Summary: This study investigated the coordination chemistry of three ligands with uranyl nitrate and lanthanide nitrates, characterized by various analytical techniques. The behavior and stability of the ligands in metal ion extraction were explored through theoretical calculations and solvent extraction studies. Results showed different bonding modes and extraction preferences for uranium and europium ions, along with the radiation and chemical stability of the ligands.

POLYHEDRON (2021)

Article Metallurgy & Metallurgical Engineering

Extraction of molybdenum, nickel and aluminium from spent Ni-Mo hydrodesulphurization (HDS) catalyst in oxalic acid solutions

Sedat Ilhan

CANADIAN METALLURGICAL QUARTERLY (2020)

Article Engineering, Environmental

Multiscale model for steam enhancement effect on the carbonation of CaO particle

Hui Wang et al.

CHEMICAL ENGINEERING JOURNAL (2020)

Article Engineering, Chemical

General rate equation theory for gas-solid reaction kinetics and its application to CaO carbonation

Zhenshan Li

CHEMICAL ENGINEERING SCIENCE (2020)

Article Metallurgy & Metallurgical Engineering

Improving the separation of molybdenum from iron in acidic sulfate solutions due to the antagonistic effect

Haojie Zhang et al.

HYDROMETALLURGY (2019)

Article Nanoscience & Nanotechnology

Ab Initio Metadynamics Study of the VO2+/VO2+ Redox Reaction Mechanism at the Graphite Edge/Water Interface

Zhen Jiang et al.

ACS APPLIED MATERIALS & INTERFACES (2018)

Article Engineering, Chemical

Solvent similarity analysis-from qualitative to quantitative

Yueqiang Zhao et al.

CHEMICAL ENGINEERING SCIENCE (2018)

Article Chemistry, Multidisciplinary

Kinetics of thiophene hydrodesulfurization over a supported Mo-Co-Ni catalyst

Rami Doukeh et al.

COMPTES RENDUS CHIMIE (2018)

Article Chemistry, Physical

Atomic structure and migration dynamics of MoS2/LixMoS2 interface

Shulin Chen et al.

NANO ENERGY (2018)

Article Chemistry, Multidisciplinary

3R and 2H polytypes of MoS2: DFT and DFPT calculations of structural, optoelectronic, vibrational and thermodynamic properties

S. S. Coutinho et al.

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS (2017)

Proceedings Paper Engineering, Industrial

Synthesis of Al2( MoO4)3 by Two Distinct Processes, Hydrothermal Reaction and Solid-State Reaction

Yuhei Matsumoto et al.

PROCEEDING OF 4TH INTERNATIONAL CONFERENCE ON PROCESS ENGINEERING AND ADVANCED MATERIALS (ICPEAM 2016) (2016)

Review Chemistry, Multidisciplinary

Electrochemistry of Nanostructured Layered Transition-Metal Dichalcogenides

Xinyi Chia et al.

CHEMICAL REVIEWS (2015)

Article Chemistry, Multidisciplinary

Trends in the Adsorption and Growth Morphology of Metals on the MoS2(001) Surface

Wissam A. Saidi

CRYSTAL GROWTH & DESIGN (2015)

Article Chemistry, Multidisciplinary

Extraction of metals from Mo-Ni/Al2O3 spent catalyst using H2SO4 baking-leaching-solvent extraction technique

K. H. Park et al.

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY (2012)

Article Materials Science, Multidisciplinary

Effects of confinement and environment on the electronic structure and exciton binding energy of MoS2 from first principles

Hannu-Pekka Komsa et al.

PHYSICAL REVIEW B (2012)