EDXRF & XRT

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Energy dispersive X-ray fluorescence (EDXRF) is a routinely used analytical technique for the qualitative and quantitative determination of major and minor atomic elements in a wide variety of sample types. The heart of its versatility stems from the ability to provide rapid, non-destructive, multi-element analyses—from low parts-per-million (ppm) levels to high weight percent (wt%) concentrations—for elements from sodium (¹¹Na) to uranium (⁹²U).

X-ray Transmission (XRT) on-line process analyzers are routinely employed to classify crude oil and marine bunker fuels that contain 0.02-6 wt% sulfur (S). In this method, sulfur absorbs X-rays transmitted between an X-ray source and detector. The technique is well suited to the high pressures and extreme temperatures employed in transmission pipelines and blending operations.

NEX XT

Advanced X-ray Transmission (XRT) Sulfur Gauge—for Crude Oil, Marine Bunker Fuel and Blending Operations

Rigaku's NEX XT is the next generation process gauge for high-level sulfur measurement (0.02% to 6% S) of crude, bunker fuel, fuel oils, and other highly viscous hydrocarbons, including residuums.

On-Line sulfur gauge

This versatile, compact and robust X-ray Transmission (XRT) process gauge is specifically optimized for the sulfur analysis needs of refineries, pipelines, blending operations, bunkering terminals and other storage facilities. Applications for the NEX XT include bunker fuel blending to meet MARPOL Annex VI sulfur restrictions, interface detection of different grade fuels delivered via pipelines, refinery feedstock blending and monitoring, and the quality monitoring of crude at remote collection and storage facilities.

Compact design with no routine maintenance

Measure sulfur (S) from 200 ppm to 6 wt%
Up to 1480 psig and 200°C
User adjustable data update frequency
Reduced standards requirements
No sample condition or recovery system
No radioisotopes

X-ray transmission method

In the Rigaku NEX XT X-ray Transmission (XRT) on-line analyzer, a process stream passes through a flowcell where sulfur (S), in the hydrocarbon matrix, absorbs X-rays transmitted between an X-ray source and detector (see schematic at left). The recorded X-ray intensity is inversely proportional to the sulfur concentration.

Rigaku's NEX XT is engineered to be fully compatible with the high pressures and extreme temperatures employed in transmission pipelines and blending operations. Among its other key features are a simplified user interface, automatic density compensation, automatic water compensation, password protection, and standard platform for communicating sulfur, density, and water content to a plant-wide DCS.

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