The direct synthesis of a bio-lubricant by the oligomerization of methyllinoleate via castor oil

2019 ◽  
Vol 21 (24) ◽  
pp. 6658-6666 ◽  
Author(s):  
Wenjie Xue ◽  
Lei Shi ◽  
Xinqing Chen ◽  
Minghuang Qiu ◽  
Cunhui Zhou ◽  
...  
Keyword(s):  
Noble Metal ◽  
Castor Oil ◽  
Direct Synthesis ◽  
Maximum Yield ◽  
Mo Catalyst

A non-noble metal (Mo) catalyst for the oligomerization of methyllinoleate via castor oil was successfully prepared to directly synthesize bio-lubricatant oil. The obtained oligomers were produced at a maximum yield of 70.8%.

A review on research progress in the direct synthesis of hydrogen peroxide from hydrogen and oxygen: noble-metal catalytic method, fuel-cell method and plasma method

2016 ◽  
Vol 6 (6) ◽  
pp. 1593-1610 ◽  
Author(s):  
Yanhui Yi ◽  
Li Wang ◽  
Gang Li ◽  
Hongchen Guo
Keyword(s):  
Hydrogen Peroxide ◽  
Fuel Cell ◽  
Noble Metal ◽  
Direct Synthesis ◽  
Research Progress ◽  
Pd Catalyst ◽  
Catalytic Method ◽  
Plasma Method ◽  
Cell Method ◽  
Plasma Methods

The direct synthesis of H2O2 from H2 and O2 using Pd catalyst, fuel cell and plasma methods have been reviewed systematically.

Ethanol direct synthesis from dimethyl ether and syngas on the combination of noble metal impregnated zeolite with Cu/ZnO catalyst

2014 ◽  
Vol 232 ◽  
pp. 22-26 ◽  
Author(s):  
Peng Lu ◽  
Guohui Yang ◽  
Yuki Tanaka ◽  
Noritatsu Tsubaki
Keyword(s):  
Dimethyl Ether ◽  
Noble Metal ◽  
Direct Synthesis

scholarly journals The Synthesis of V2O3 Nanorings by Hydrothermal Process as an Efficient Electrocatalyst Toward N2 Fixation to NH3

2020 ◽  
Vol 8 ◽  
Author(s):  
Ning Wang ◽  
Qing-Song Song ◽  
Wen-Jing Liu ◽  
Jian Zhang
Keyword(s):  
Noble Metal ◽  
Hydrothermal Process ◽  
Maximum Yield ◽  
Reduction Reaction ◽  
Reversible Hydrogen Electrode ◽  
Proof Of Concept ◽  
Ambient Conditions ◽  
Hydrogen Electrode ◽  
Etching Mechanism ◽  
Template Free

A new ringlike V2O3 architecture was successfully synthesized by a template-free hydrothermal method, and the sulfur ions-assisted central-etching mechanism of the ringlike structure was proposed. Herein, as a proof-of-concept experiment, taking V2O3 nanorings as non-noble-metal-free nitrogen reduction reaction (NRR) catalysts, they show desired electrocatalytic performance toward NRR under ambient conditions (maximum yield: 47.2 µg h−1 mgcat.−1 at −0.6 V vs. reversible hydrogen electrode, maximum Faraday efficiency: 12.5% at −0.5 V vs. reversible hydrogen electrode), which is significantly higher than those of noble metal-based catalysts.

Synthesis of Biodiesel from Castor Oil Catalyzed by Cesium Phosphotungstate with the Assistance of Microwave

2013 ◽  
Vol 291-294 ◽  
pp. 300-306 ◽  
Author(s):  
Hong Yuan ◽  
Qing Shu
Keyword(s):  
Microwave Radiation ◽  
Castor Oil ◽  
Solid Acid ◽  
Maximum Yield ◽  
Conventional Heating ◽  
Molar Ratio ◽  
Mass Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Programmed

Two cesium phosphotungstate-derived solid acid catalysts (Cs2.5H0.5PW12 and Cs0.5H2.5PW12) were prepared. The resulting catalysts were characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), N2 adsorption and desorption isotherm and temperature programmed desorption of ammonia(NH3-TPD). The Cs2.5H0.5PW12 and Cs0.5H2.5PW12 were respectively used to catalyze the tranesterification of castor oil and methanol for the synthesis of biodiesel with the assistance of microwave. Results shown microwave radiation can greatly enhance the transesterification process when compared with conventional heating method. Cs2.5H0.5PW12 showed better catalyst performance than Cs0.5H2.5PW12. A maximum yield of 90% was obtained from the using of 30:1 molar ratio of methanol to castor oil and 15 wt % mass ratio of catalyst to castor oil at 343 K under microwave radiation after 4h.

Performance of Compression Ignition Engine with Coated Piston for Multiple Blends of Methyl Castor Oil

2016 ◽  
Vol 8 (2) ◽  
Author(s):  
V.H. Wilson ◽  
V. Yalini
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Castor Oil ◽  
Fatty Acid Content ◽  
Maximum Yield ◽  
Biodiesel Production ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Step Process ◽  
Performance And Emission

Fossil fuel is getting exhausted at a fast rate and contributes to high carbon monoxide emissions. Biodiesel, being environmentally friendly, has better performance than diesel. Castor oil is an easily available vegetable oil in India. But its high viscosity leads to blockage of the fuel lines. The amount of free fatty acid more than 1% leads to soap formation which necessitates the biodiesel production in a two step process. The first step of acid catalyzed esterification process reduces the free fatty acid content of castor oil to below 1%. The second step of transesterification process converts the preheated oil to castor biodiesel. This two step process gave a maximum yield of 90%.The methyl castor oil (biodiesel) is blended with diesel in different proportions on volume basis as 15:85 (B15), 25:75 (B25), and 35:65 (B35). These blended oils are used to run a single cylinder four stroke compression ignition engine with different coatings of pistons, to study and compare the engine performance and emission characteristics at different load conditions.

Direct Synthesis of Two-Dimensional Metal–Organic Framework Nanoplates for Noble Metal Load and Gaseous Iodine Adsorption

2020 ◽  
Vol 20 (3) ◽  
pp. 1378-1382 ◽  
Author(s):  
Xin Chen ◽  
Xue Jiang ◽  
Xingfeng Lei ◽  
Baoliang Zhang ◽  
Mingtao Qiao ◽  
...  
Keyword(s):  
Noble Metal ◽  
Metal Organic Framework ◽  
Direct Synthesis ◽  
Two Dimensional ◽  
Metal Organic ◽  
Iodine Adsorption ◽  
Metal Load ◽  
Organic Framework

Synthesis of Ammonia Directly from Air and Water via a Single-Chamber Reactor Using Lanthanum Chromite-Based Composite as an Electrocatalyst

2021 ◽  
Vol 32 ◽  
pp. 35-44
Author(s):  
Ibrahim A. Amar ◽  
Mohammed M. Ahwidi
Keyword(s):  
Noble Metal ◽  
Ammonia Synthesis ◽  
Direct Synthesis ◽  
Formation Rate ◽  
Lanthanum Chromite ◽  
Ammonia Production ◽  
Faradaic Efficiency ◽  
Single Chamber ◽  
Promising Technology ◽  
Ammonia Formation

Carbon-free electrosynthesis of ammonia using water (H2 source) and air (N2 source) is promising technology to reduce the global CO2 emission resulting from the industrial ammonia production process (Haber-Bosch). In this study, electrocatalysis activity of non-noble metal perovskite-based catalyst (La0.75Sr0.25Cr0.5Fe0.5O3-δ-Ce0.8Gd0.18Ca0.02O2-δ, LSCrF-CGDC) for ammonia synthesis directly from air and water was explored. Ammonia was successfully from wet air (3%H2O) synthesized in a single-chamber type reactor. The highest ammonia formation rate and Faradaic efficiency of about 1.94×10-11 mol s-1 cm-2 and 2.01% were achieved at 375 oC and 1.2 V, respectively. The observed ammonia formation rate is higher than reported for an expensive noble metal-based catalyst (Ru/MgO). The obtained results indicated that the direct synthesis of ammonia from air and water is a promising technology for green and sustainable ammonia synthesis.

Direct Synthesis of Liquid Metal Colloids and Their Transmetalation into Noble Metal Nanoparticles

2014 ◽  
Vol 43 (8) ◽  
pp. 1207-1209 ◽  
Author(s):  
Shinya Sudo ◽  
Shunjiro Nagata ◽  
Kenta Kokado ◽  
Kazuki Sada
Keyword(s):  
Liquid Metal ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Direct Synthesis ◽  
Noble Metal Nanoparticles ◽  
Metal Colloids

scholarly journals Comparative Study on the Influence of Noble Metal Nanoparticles (Ag, Au, Pd) on the Photocatalytic Activity of ZnO NPs Embedded in Renewable Castor Oil Polymer Matrices

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3468
Author(s):  
Andreea L. Chibac-Scutaru ◽  
Viorica Podasca ◽  
Daniel Timpu ◽  
Violeta Melinte
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Castor Oil ◽  
Nanocomposite Films ◽  
Noble Metal Nanoparticles ◽  
Zno Nps ◽  
Urethane Dimethacrylate

Hybrid polymeric materials, due to the unique combination of properties that can be obtained by the convenient variation of organic and inorganic components, represent an attractive alternative for many applications, especially photocatalysis. Herein, we report the preparation of nanocomposite films containing functionalized ZnO nanoparticles, as well as in situ photogenerated noble metal nanoparticles (Ag, Au, Pd), for the achieving of materials with enhanced photocatalytic activity under visible light. The flexible free-standing nanocomposite films were synthesized by photopolymerization of a monomer mixture (silane castor oil urethane dimethacrylate and polypropylene oxide urethane dimethacrylate) in the presence of a Irgacure 819 photoinitiator. The efficiency of ZnO NPs functionalization was established by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis, while the polymer composites were characterized by UV-Vis spectroscopy, X-ray diffraction, transmission electron microscopy and scanning electron microscopy to evidence the formation, size and distribution of the nanoparticles inside the photocrosslinked matrix. To establish the photocatalytic capacity of nanocomposite films, the decomposition of various pollutants (methyl orange, phenol, metronidazole) was monitored under visible light irradiation, the best results being obtained for Au/ZnO film. Also, the advantage of immobilizing the catalysts in a polymeric support and its recycling ability without a significant decrease in photocatalytic efficiency was analysed.

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