Analytical Instrumentation
A New Solution to Eliminate Centrifuge for Sulfur in Crude Oil Analysis
Jul 20 2018
Author: Kyle Kuwitzky - XOS on behalf of XOS
BACKGROUND
Test methods for measuring sulfur content, like ASTM D4294 and ISO 8754, have become critical for assessing the value of crude oil. These methods utilize X-ray Fluorescence (XRF) analysis, and with any method, it is important to consider the interferences inherent within the analysis technique. The ASTM D4294 standard test method references matrix effects as a known interference, which may influence the sulfur measurement in crude oil and produce biased results.
CHALLENGE
Crude oil presents unique challenges for ASTM D4294 analysis. While sulfur containing compounds in crude oil are primarily comprised of organosulfur compounds that remain homogeneous in hydrocarbons, interferences like Si, Ca, Cl, Fe and water are commonly present and will settle to the bottom of a sample over time. These interferences can absorb the X-ray signal and reduce the concentration of sulfur reported. While many D4294 instruments (traditional XRF) can correct for interfering elements, interferences that settle in crude oil can create challenging scenarios. Diagram A demonstrates settling over a period of 60 minutes.
Digital Edition
PIN 25.3 June/July
June 2024
Analytical Instrumentation - Recent Advances In Various Bench Scale Accelerated Oxidative Testing Methods For Fuels - Petrochemical Industry: Anton Paar Solutions Streamline Processes, Reduce H...
View all digital editions
Events
Jul 30 2024 Jakarta, Indonesia
Jul 30 2024 Jakarta, Indonesia
China Energy Summit & Exhibition
Jul 31 2024 Beijing, China
Jul 31 2024 Chengdu, China
Aug 05 2024 Moon Township, PA, USA