Spectrochimica Acta, Part B: Atomic Spectroscopy, volume 174, pages 105997

Suspension assisted analysis of sulfur in petroleum coke by total-reflection X-ray fluorescence

Fernández Ruiz Ramón
Redrejo M J
Friedrich K E Josué
Rodriguez Nuria
Amils Ricardo
Publication typeJournal Article
Publication date2020-12-01
Quartile SCImago
Q2
Quartile WOS
Q1
Impact factor3.3
ISSN05848547
Spectroscopy
Analytical Chemistry
Atomic and Molecular Physics, and Optics
Instrumentation
Abstract
The influence of the particle size distribution of a petroleum coke sample compared to its sulfur content was investigated. For this matrix, an optimization procedure of the Suspension Assisted Analysis (SAA) by Total-reflection X-Ray Fluorescence (TXRF) quantitative method was developed. SAA-TXRF sulfur recoveries were evaluated for three particle size distributions of the same coke sample. The sulfur recovery increased when the particle size distribution was smaller. The observed behaviour was correlated and validated with CHNS elemental analysis and microwave-assisted digestion TXRF measurements. The results indicate that the sulfur signal is strongly influenced by the particle size distribution and the deposition morphology of the petroleum coke material. This effect could be explained by the presence of a strong absorption effect for the sulfur signal in combination with the distortion of the X-ray Standing Waves (XSW) field observed between the analyte, S, and the elements Ti and Co, which were used as an internal standard. The variation in sulfur observed was up to 45.5% lower than the higher recovery obtained by CHNS. This investigation suggests that for an adequate application of the SAA-TXRF method in petroleum coke or similar matrices, careful optimization of the final particle dispersion of the ground coke is crucial and necessary. In this case, the use of a high- power ultrasound probe was the key.

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Fernández Ruiz R. et al. Suspension assisted analysis of sulfur in petroleum coke by total-reflection X-ray fluorescence // Spectrochimica Acta, Part B: Atomic Spectroscopy. 2020. Vol. 174. p. 105997.
GOST all authors (up to 50) Copy
Fernández Ruiz R., Redrejo M. J., Friedrich K E. J., Rodriguez N., Amils R. Suspension assisted analysis of sulfur in petroleum coke by total-reflection X-ray fluorescence // Spectrochimica Acta, Part B: Atomic Spectroscopy. 2020. Vol. 174. p. 105997.
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RIS Copy
TY - JOUR
DO - 10.1016/j.sab.2020.105997
UR - https://doi.org/10.1016%2Fj.sab.2020.105997
TI - Suspension assisted analysis of sulfur in petroleum coke by total-reflection X-ray fluorescence
T2 - Spectrochimica Acta, Part B: Atomic Spectroscopy
AU - Fernández Ruiz, Ramón
AU - Redrejo, M J
AU - Friedrich K, E Josué
AU - Rodriguez, Nuria
AU - Amils, Ricardo
PY - 2020
DA - 2020/12/01 00:00:00
PB - Elsevier
SP - 105997
VL - 174
SN - 0584-8547
ER -
BibTex
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BibTex Copy
@article{2020_Fernández Ruiz
author = {Ramón Fernández Ruiz and M J Redrejo and E Josué Friedrich K and Nuria Rodriguez and Ricardo Amils},
title = {Suspension assisted analysis of sulfur in petroleum coke by total-reflection X-ray fluorescence},
journal = {Spectrochimica Acta, Part B: Atomic Spectroscopy},
year = {2020},
volume = {174},
publisher = {Elsevier},
month = {dec},
url = {https://doi.org/10.1016%2Fj.sab.2020.105997},
pages = {105997},
doi = {10.1016/j.sab.2020.105997}
}
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