Careful Investigations of PTV Injection Parameters for the Analysis of Vacuum Gas Oil by High-Temperature Comprehensive GC × GC,Energy & Fuels

当前位置： X-MOL 学术 › Energy Fuels › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Careful Investigations of PTV Injection Parameters for the Analysis of Vacuum Gas Oil by High-Temperature Comprehensive GC × GC
Energy & Fuels ( IF 5.2 ) Pub Date : 2020-09-07 , DOI: 10.1021/acs.energyfuels.0c01314
Marco Piparo _{1,

2,

3} , Lucille Flamant _{2,

3} , Gaelle Jousset _{2,

3} , Pascal Cardinael ₁ , Pierre Giusti _{2,

3}

Affiliation

To satisfy the global demand, more and more high-quality fuels, pure or converted from heavy oil cuts, like vacuum gas oil (VGO), into highly refined fuels are needed. To meet this increasingly demand, molecular information is mandatory to allow for a detailed characterization of these heavy oil fractions. Several separation techniques have been developed in the last years, among them gas chromatography (GC) and GC × GC are the most widely used ones for obtaining this information. To perform an exhaustive gas chromatographic analysis, all steps must be optimized. In particular, the injection process, which is a key part of the chromatographic process, should ensure the transfer of a representative part of the sample into the columns. This paper will show how the optimization of all programmable-temperature vaporizing (PTV) injection parameters allowed the determination of optimal high-temperature GC × GC (HT-GC × GC) conditions for the analysis of vacuum gas oil avoiding sample discrimination and sample degradation. n-Paraffins recovery from nC₈ to nC₄₄ was satisfactory and was calculated to be between 93.0 and 100.5% using PTV in splitless injection mode, and between 86.8 and 100.1% in solvent vent mode. A first application of HT-GC × GC using a flow modulator for the analysis of one of the heaviest petroleum cuts is also described. Comparison with other injection techniques showed the possibility to implement PTV, compared to on-column injector, in high-temperature applications for allowing satisfactory recovery of whole sample.

中文翻译：

高温综合GC×GC分析真空汽油的PTV进样参数的仔细研究

为了满足全球需求，需要越来越多的高质量燃料，无论是纯净燃料还是从重油馏分（例如真空瓦斯油（VGO））转化为高度精炼的燃料。为了满足这种日益增长的需求，必须提供分子信息以对这些重油馏分进行详细表征。近年来，已经开发了几种分离技术，其中气相色谱（GC）和GC×GC是获得此信息的最广泛使用的技术。要进行详尽的气相色谱分析，必须优化所有步骤。特别是，进样过程是色谱过程的关键部分，应确保将样品的代表性部分转移到色谱柱中。从n C ₈到n C _44的正构烷烃回收率令人满意，使用不分流进样模式的PTV计算得出的正构烷烃回收率在93.0至100.5％之间，在溶剂排放模式下计算得出的正构烷烃回收率在86.8至100.1％之间。还介绍了使用流量调节器分析最重的石油馏分之一的HT-GC×GC的首次应用。与其他进样技术的比较表明，与柱上进样器相比，在高温应用中可以实现PTV，从而可以令人满意地回收整个样品。

更新日期：2020-10-16

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11