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Tighten Control of Distillation Processes with the New MXT®-1HTSim Dist Column |
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Tighten Control of Distillation Processes with the New MXT®-1HTSim Dist Column
By Barry Burger, Petroleum Chemist and Jan Pijpelink, Petrochemical Market Development Manager
Content previously published inPetro Industry News
High temperature crude oil simulated distillation using ASTM methods D6352 and ASTM D7500 presents many challenges to refineries and contract laboratories for the determination of petroleum distillates in the boiling range of 174°C to 720°C. Both the column construction and the polydimethylsiloxane polymer must be robust enough to withstand the high method temperatures without significant degradation. In addition, columns must yield a C50/C52 resolution value between 2 and 4, exhibit acceptable peak symmetry, and reliably produce accurate boiling point data. Accurate determination of the boiling range distribution of medium and heavy fractions using GC simulated distillation provides critical information regarding the composition of crude oil and other products related to refinery processes. While fused silica columns can be used, they are not the best option anymore for high temperature simulated distillation applications. Metal MXT®-1HT Sim Dist columns are a much better alternative. These new columns are more stable at 430°C than fused silica columns and easily meet all method criteria, even under accelerated conditions.
Exceptional Stability Extends Column Lifetime
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Advances in Porous Layer Open Tubular Columns |
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Advances in Porous Layer Open Tubular Columns
Content previously published in International Laboratory
Jaap de Zeeuw discusses recent advances in PLOT column technology in anInternational Laboratoryarticle. New stabilization technology minimizes particle release, assuring more consistent flow and better performance for a number of applications.
Find out more (4.4mb pdf) |
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New D3606 Column Set Outperforms TCEP Columns for Benzene Analysis |
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New D3606 Column Set Outperforms TCEP Columns for Benzene Analysis
By Barry Burger, Petroleum Chemist and Jan Pijpelink, Petrochemical Market Development Manager
Content previously published in Petro Industry News
 Demand for finished gasolines containing ethanol continues to increase, as these fuels reduce greenhouse gas emissions and can be used to help control air pollution. Ethanol is a cost-effective additive for production; however, its presence significantly complicates the analysis of benzene, a regulated carcinogen which is added to increase octane levels. Accurate benzene and toluene analysis is critical because incorrect data can result in inaccurate octane levels and out-of-specification product. Toluene analysis is straightforward, but benzene is extremely difficult to separate from ethanol on the 1,2,3-tris(2-cyanoethoxy) propane (TCEP) column listed in ASTM method D3606. A new D3606 column set developed by Restek separates benzene and ethanol completely and more reliably than TCEP columns, resulting in tighter control and more accurate results for refineries and contract laboratories.
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Higher DHA Sample Throughput for PONA Analysis: Options for Helium and Hydrogen |
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Chemical/Petrochemical Article
Higher DHA Sample Throughput for PONA Analysis: Options for Helium and Hydrogen
By Barry Burger, Petroleum Chemist, Jan Pijpelink, Petrochemical Market Development Manager, and Jaap de Zeeuw, International GC Consumables Specialist
Content previously published in Petro Industry News
Accurate information about the concentrations of the individual components in gasolines is critical for evaluating raw materials and controlling refinery processes. A high-resolution GC method for detailed hydrocarbon analysis (DHA) of gasolines is outlined in American Society of Testing and Materials (ASTM) Method D6730-01—often referred to as the PONA (paraffins, olefins, naphthenes, aromatics) or PIANO (paraffins, isoparaffins, aromatics, naphthenes, olefins) analysis. ASTM D6730-01 is specific for the analysis of these hydrocarbon components, plus oxygenated additives such as methanol, ethanol, tert-butanol, methyl tert-butyl ether (MTBE), and tert-amyl methyl ether (TAME) in spark-ignition engine fuels.
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Stable Sulphur & Mercury Sampling in Refineries |
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Stable Sulphur & Mercury Sampling in Refineries
Using Siltek® and Sulfinert® Surface Treated Components
- Reliably sample sulfur and mercury compounds at ppb levels.
- Reduce lab costs—obtain accurate results the first time.
- Detect costly process upsets, improving product yield.
Refinery and natural gas samples often contain trace amounts of sulfur- and mercury-containing compounds, which can interfere with reactions, poison catalysts in petrochemical processes, and damage equipment. Because these compounds quickly react with stainless steel surfaces, accurate determination of these compounds is impossible when samples are collected and stored in untreated sample cylinders. Restek’s Siltek® and Sulfinert®passivation techniques bond an inert layer into the surface of stainless steel, preventing active compounds from reacting with or adsorbing to the steel.
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