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.)
Toward New Descriptors of Basic Nitrogen Compounds in Middle Distillates by 2D NMR
Energy & Fuels ( IF 5.2 ) Pub Date : 2020-01-27 , DOI: 10.1021/acs.energyfuels.9b03199
D. Proriol 1 , L. Chahen 1
Affiliation  

Basic nitrogen compounds (N-compounds), present in middle distillates, can inhibit acidic catalysts used in hydrotreatment processes. A better knowledge of these compounds, especially the environment of the nitrogen atom, may be interesting to improve these processes. Herein, we propose a new promising methodology to couple the extraction of the basic N-compounds by flash chromatography with 2D NMR analysis. The NMR sequence heteronuclear single-quantum correlation (HSQC) allows us to visualize specific C–H correlations and, with the help of the prediction software Advanced Chemistry Development/Laboratory (PS-ACDL), eleven areas of interest have been identified. The representativeness of these areas has been validated with data from literature and with a gas oil (GO) sample analysis. These areas are specific to C–H couples in pyridine, quinoline, isoquinoline, and acridine derivatives and give a detailed fingerprint of basic N-compounds in the GO cut. Moreover, certain areas allow us to describe the close environment of the nitrogen atom and allow, for example, to differentiate isoquinoline from quinoline derivatives.

中文翻译:

二维NMR寻找中间馏分中碱性氮化合物的新描述词。

存在于中间馏分中的碱性氮化合物(N化合物)可以抑制加氢处理过程中使用的酸性催化剂。更好地了解这些化合物,尤其是氮原子的环境,可能对改善这些过程很有帮助。在本文中,我们提出了一种新的有前途的方法,以通过快速色谱与2D NMR分析耦合基本N化合物的提取。NMR序列异核单量子相关性(HSQC)使我们可以可视化特定的C–H相关性,借助预测软件Advanced Chemistry Development / Laboratory(PS-ACDL),已确定了11个感兴趣的领域。这些领域的代表性已通过文献数据和粗柴油(GO)样品分析得到验证。这些区域是吡啶,喹啉,异喹啉和a啶衍生物,并在GO色谱图中给出了基本N化合物的详细指纹图谱。此外,某些区域允许我们描述氮原子的封闭环境,并允许例如区分异喹啉和喹啉衍生物。
更新日期:2020-01-29
down
wechat
bug