| Catalog | Sample Lot No. | Appearance | Purity | |
|---|---|---|---|---|
| ACM660606-1A | A24C423P | Solid | Min. 98% | INQUIRY |
Yuan, Chengdong, et al. Fuel 284 (2021): 118981.
To enhance the efficiency of in-situ combustion (ISC) for heavy oil recovery, copper(II) stearate has been proposed as an oil-soluble catalyst to catalyze the oxidation of heavy oil during the ISC process. Through a combination of TG-FTIR, autoclave experiments, FESEM-EDX, and XPS, alongside isoconversional kinetic methods, the catalytic mechanism and kinetics were thoroughly investigated. The study found that the addition of copper(II) stearate could initiate efficient homogenous and heterogeneous catalytic oxidation/combustion processes for heavy oil. In the low-temperature range, copper(II) stearate acts as a homogeneous catalyst in the Low-Temperature Oxidation (LTO) phase before its complete decomposition. In the high-temperature range, the in-situ generated CuO nanoparticles (formed after the complete decomposition of copper(II) stearate) serve as a heterogeneous catalyst during the Fuel Deposition (FD) and High-Temperature Oxidation (HTO) phases, facilitating the formation and combustion of the fuel (coke-like residues).
Specifically, the addition of copper(II) stearate significantly reduced the activation energy (Eα) values in various reaction stages (LTO, FD, and HTO), most notably in the late stages of LTO, FD, and the early stages of HTO. The maximum Eα decreased from approximately 500-600 KJ/mol to 300-400 KJ/mol, thereby reducing the required energy to overcome reaction barriers, increasing the speed and quality of coke formation, and promoting a more continuous formation and combustion process of the coke residues.
Suyambulingam, Gokul Raja Thangaiyanadar, et al. Chemical Engineering Journal 320 (2017): 468-477.
The development of superhydrophobic materials is rapidly expanding due to their various applications, such as self-cleaning surfaces, oil-water separation, and aquatic robots. In this study, a cost-effective spraying method was employed to develop a superhydrophobic coating composed of porous ZnO nanoparticles and copper stearate (CuSA2).
Spraying of ZnO/Copper Stearate Films
ZnO/CuSA2 films were deposited using a spray method, varying the weight ratio of ZnO. Briefly, CuSA2 (0.32 g) was dispersed in ethanol (25 mL) using ultrasonication for 10 minutes. Following this, different weight percentages of ZnO nanoparticles (0.06, 0.08, 0.10, 0.12, and 0.14 grams) were added to the CuSA2 solution and ultrasonicated for 30 minutes using a probe-type ultrasonic generator. The resulting green suspension was placed in an atomizer bowl and sprayed onto pre-cleaned glass substrates (maintained on a hot plate at 60 °C) at a pressure of 4 psi. The coating process was carried out over different time ranges, from 30 seconds to 30 minutes. The sprayed films containing porous ZnO, submicron ZnO, and ZnO nanoparticles impregnated with CuSA2 were respectively referred to as ZnO/CuSA2 coatings, submicron ZnO/CuSA2 coatings, and ZnO nanoparticle/CuSA2 coatings.
Panigrahi, Sudipa, et al. The Journal of Physical Chemistry C 111.4 (2007): 1612-1619.
This report discusses the synthesis and stabilization of copper organic sols in toluene using the biomolecules L-cysteine and 1-dodecanethiol (DDT), and characterizes the particles to identify Cu-S interactions. The synthesized particles were found to be effective catalysts for the synthesis of octylphenol ether. In this synthesis process, copper stearate was used for the first time as a Cu(II) precursor.
Copper organic sols were synthesized using a single-phase process with copper stearate as the Cu(II) precursor. A copper stearate solution was prepared in tetrahydrofuran (THF) and used as a stock solution (10-1 M). Then, 200 µL of the copper stearate solution was diluted with toluene to a final volume of 30 mL. Nitrogen gas was bubbled through the solution to remove dissolved oxygen. Subsequently, 0.005 grams of solid L-cysteine was added to the toluene mixture. The final concentration of Cu(II) in toluene was 0.66 mM, and the final concentration of the cysteine ligand was 1 mM. Finally, the mixture was treated with 2 mg of solid sodium borohydride and shaken vigorously. As shaking continued, the green color gradually faded, and after 25 minutes, the solution turned colorless indicating the formation of colorless Cu(I). After an additional 20 minutes of shaking, a pale yellow color appeared in the solution, indicating the beginning of copper nanoparticle precipitation in toluene. DDT was added instead of cysteine for a different test. Upon adding DDT to the copper stearate solution in toluene, the green color immediately vanished, and after 20 minutes of shaking, the colorless solution turned yellow, indicating the formation of copper organic sol in toluene.
Absorbance measurements of the resulting solutions revealed a new absorption peak at 487 nm for the cysteine-functionalized solution, while the DDT-protected copper organic sol exhibited a maximum absorption peak at 458 nm, consistent with the typical plasmon resonance peak of copper nanoparticles. The solution was left to stand for 24 hours to allow excess NaBH4 to decompose, yielding a toluene copper organic sol completely free from reducing agents.
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