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. 2022 Sep 20;7(39):34966-34973.
doi: 10.1021/acsomega.2c03574. eCollection 2022 Oct 4.

Cu-BDC and Cu2O Derived from Cu-BDC for the Removal and Oxidation of Asphaltenes: A Comparative Study

Abhishek Nayak  1 , Shanon Viegas  1 , Harshini Dasari  1 , Nethaji Sundarabal  1
Affiliations

Cu-BDC and Cu2O Derived from Cu-BDC for the Removal and Oxidation of Asphaltenes: A Comparative Study

Abhishek Nayak et al. ACS Omega. .

Abstract

Asphaltenes have been associated with a number of problems in the petroleum industry with regard to the storage, exploration, and transportation of petroleum crude. In the current work, Copper-BenzeneDiCarboxylic acid (Cu-BDC) and Cu-BDC derived metal oxide has been used in the removal and oxidation of the asphaltenes. The MOF derived metal oxide was confirmed to be Cu2O. Though adsorption of asphaltenes followed a Langmuir adsorption isotherm in both cases, Cu-BDC was superior to Cu2O with an adsorption capacity four times that of the adsorption capacity of Cu2O. Also, the kinetic studies showed that the adsorption kinetics followed pseudo second order adsorption kinetics in both cases. From the oxidation studies, it was found that Cu-BDC was unstable beyond 350 °C and had no role in catalyzing the oxidation reaction. The Cu2O, however, was successful at catalyzing the asphaltene oxidation reaction and a reduction of 50 °C in oxidation temperature was observed. Hence comparing Cu-BDC with Cu2O, MOF was successful in the adsorption reaction but the MOF derived metal oxide had the upper hand in the oxidation reaction.

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Conflict of interest statement

The authors declare no competing financial interest.

Figures

Figure 1
Figure 1
FESEM micrographs of (A) Cu-BDC and (B) Cu2O.
Figure 2
Figure 2
XRD of the prepared Cu2O and Cu-BDC MOF.
Figure 3
Figure 3
FTIR spectrum of prepared Cu2O and Cu-BDC.
Figure 4
Figure 4
Langmuir and Freundlich isotherm model plots for the adsorption of asphaltenes using Cu-BDC and Cu2O.
Figure 5
Figure 5
Boyd plot of the asphaltenes adsorption onto Cu2O and Cu-BDC.
Figure 6
Figure 6
TGA of asphaltenes oxidation against Cu-BDC and Cu2O assisted oxidation of asphaltenes along with Cu-BDC thermal degradation profile.
See this image and copyright information in PMC

References

    1. Rashid Z.; Wilfred C. D.; Gnanasundaram N.; Arunagiri A.; Murugesan T. A comprehensive review on the recent advances on the petroleum asphaltene aggregation. J. Pet. Sci. Eng. 2019, 176, 249–268. 10.1016/j.petrol.2019.01.004. - DOI
    1. Luo P.; Gu Y. Effects of asphaltene content on the heavy oil viscosity at different temperatures. Fuel 2007, 86, 1069–1078. 10.1016/j.fuel.2006.10.017. - DOI
    1. Shayan N. N.; Mirzayi B. Adsorption and removal of asphaltene using synthesized maghemite and hematite nanoparticles. Energy Fuels 2015, 29, 1397–1406. 10.1021/ef502494d. - DOI
    1. Gray M. R.The Chemistry and Technology of Petroleum, 2nd ed., revised and expanded; Speight J. G., Ed.; Marcel Dekker: New York, 1991; Vol. 38, pp 1304–1305.
    1. Mack C. Colloid chemistry of asphalts. J. Phys. Chem. 1932, 36, 2901–2914. 10.1021/j150342a005. - DOI

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