Results 31 to 40 of about 4,516 (172)

Effect of Additional Polyethylene Glycol and Citric Acid on Characteristics of NiMo/g-Al2O3 Catalyst in Light Cycle Gas Oil Hydrodesulfurisation

Bulletin of Chemical Reaction Engineering & Catalysis, 2023
Sulfur is an impurity in diesel that causes low product quality and environmental pollution. Therefore, a catalyst is needed in the profound hydrodesulfurization (HDS) reaction to produce diesel fuel with low sulfur content.
Dede Sukandar, Lailatul Badriyah, Wawan Rustyawan, Adawiah Adawiah   +3 more
doaj   +1 more source

Bimetallic CoMo Nanoparticles Supported over Carbon-Zeolite Composites as Dibenzothiophene Hydrodesulfurization Catalyst

Bulletin of Chemical Reaction Engineering & Catalysis, 2021
Cobalt molybdenum catalysts supported on novel activated carbon-HZSM-5 composites with different mass ratios were prepared by wet-impregnation method and pre-sulfided by CS2.
Zahra Mohammadian, Mohammad Hasan Peyrovi, Nastaran Parsafard   +2 more
doaj   +1 more source

Synthesis and Characterization of NiMo Catalysts Supported on Fine Carbon Particles for Hydrotreating: Effects of Metal Loadings in Catalyst Formulation

Frontiers in Chemical Engineering, 2022
The by-products collected during the synthesis of carbon nanohorns via the arc discharge synthesis method is comprised of other carbon particles (OCP).
Emma Aryee, Ajay Kumar Dalai, John Adjaye   +2 more
doaj   +1 more source

Extraction and Recovery of Metals from Spent HDS Catalysts: Lab- and Pilot-Scale Results of the Overall Process

Metals, 2022
The present study proposes an overall recycling process for spent hydrodesulfurization (HDS) catalysts. The process put together stages already known in the technical literature, tested again with samples coming from the roasting stage in a pilot kiln ...
Nertil Xhaferaj, Francesco Ferella
doaj   +1 more source

Coke Decomposition Kinetic Model of Spent Hydrodesulfurization Catalysts [PDF]

Journal of Applied Sciences and Nanotechnology
Recycling residue hydrodesulfurization (HDS) catalysts is essential due to frequent deactivation. Petroleum coke's high ignition temperature and complex combustion behavior stem from its graphite-like structure and low volatile matter.
Aymen Zween, Zaidoon Shakor, Bashir Sherhan   +2 more
doaj   +1 more source

Low‐Temperature in Situ Upgrading of Ultra‐Deep Heavy Oil Using Ni–Ce/MOF–OTf Superacid Catalysts to Enhance Energy Utilization and Sustainability

EcoEnergy, EarlyView.
A triflate‐functionalized Ni–Ce/MOF–OTf superacid enables low‐temperature (∼140°C) in situ upgrading of ultra‐deep heavy oil. It reduces viscosity by 92.11% in 12 h, maintains activity over cycles, and delivers 90.25% recovery with a lower carbon footprint by selective bond cleavage. ABSTRACT Ultra‐deep heavy oil is an important unconventional resource,
Li Wang, Ji‐Xiang Guo, Qiming Huang, Kunpeng Li, Chi Li, Yajie Wu   +5 more
wiley   +1 more source

Interspecific Differences in the Effects on Embryos Between Freshwater and Marine Fish Exposed to Water‐Accommodated Fractions Derived From Very‐Low Sulfur Fuel Oil

Environmental Toxicology, EarlyView.
ABSTRACT This study evaluated the toxic effects of water‐accommodated fractions (WAFs) of very‐low sulfur fuel oil (VLSFO) on freshwater and marine fish embryos. Embryos of Japanese medaka (Oryzias latipes), Java medaka (Oryzias javanicus), and grass puffer (Takifugu alboplumbeus) were exposed to various concentrations of VLSFO‐WAF, and the effects on ...
Jumpei Matsuo, Shusaku Fukugami, Kei Nakayama, Masatoshi Yamasaki, Emiko Kokushi, Seiichi Uno   +5 more
wiley   +1 more source

Tailoring Iron Nanostructures on MoS2: The Pivotal Role of Sulfur Vacancies in Growth Morphology and Charge Transfer

Advanced Materials Interfaces, Volume 13, Issue 18, 22 September 2026.
The deposition of Iron on pristine MoS2/Au(111) monolayers produces nanoparticles that donate charge to the support, generating Fe+2‐interfacial species. On the contrary, on defect‐engineered MoS2, sulfur vacancies trap sub‐nanometric Fe clusters and host two excess electrons that redistribute locally, suppressing Fe oxidation without formal Mo ...
Marco Nalesso, Naiara Leticia Marana, Eleonora Ascrizzi, Mattia Cattelan, Silvia Nappini, Ilargi Napal Azcona, Igor Píš, Giancarlo Milotti, Elena Magnano, Anna Maria Ferrari, Stefano Agnoli   +10 more
wiley   +1 more source

Upcycling High Impact Polystyrene Post‐Consumer E‐Waste Into Composites by Thiocracking

Macromolecular Chemistry and Physics, Volume 227, Issue 18, 29 September 2026.
A high sulfur composite (HSM) series was prepared from HIPS waste feedstock through its reaction with elemental sulfur, yielding remeltable solids with a modified thermal and mechanical properties. The resulting materials show evidence of organic comonomer incorporation, demonstrating a route for valorization of plastic waste into sulfur‐based material
Carson B. Shivers, Rhett C. Smith
wiley   +1 more source

Promoting effects in hydrogenation and hydrodesulfurization reactions on the zirconia and titania supported catalysts

, 2004
Tetralin hydrogenation (HYD) and thiophene hydrodesulfurization (HDS) were studied for the supported MoS2 and WS2 sulfides, either non-promoted or promoted with Co and Ni. The supports used were ZrO2, alumina-stabilized TiO2 and pure alumina. Preparation
Afanasiev, P, Ji, Y, Vrinat, M, Li, WZ, Li, C   +4 more
core   +1 more source