The conversion of lignocellulosic biomass by pyrolysis or hydrothermal liquefaction gives
access to a wide variety of molecules that can be used as fuel or as building blocks in the …

Complex organic mixtures are found in many areas of research, such as energy,
environment, health, planetology, and cultural heritage, to name but a few. However, due to …

The lack of information about the chemical composition and structure of asphaltenes in
crude oil, which has a sufficient share in the economy of Azerbaijan, complicates its …

Determination of the molecular structures of petroporphyrins has been crucial to understand
the diagenetic pathways and maturation of petroleum. However, these studies have been …

Petroporphyrins, geoporphyrins, or metalloporphyrins are the original petroleum biomarkers,
identified by Alfred Treibs more than a century ago and the first molecular evidence for the …

The review discusses the achievements of the last 5 years in the field of using mass
spectrometry for the analysis of crude oils and some oil refining products. The presented …

Petroprophyrins are biomarkers used to extract information about petroleum genesis among
other characteristics. Identification of particular types, such as Ni, Cu, Mn, vanadyl (VO), and …

The presented review considers the currently relevant methods for studying petroleum
porphyrins. For this purpose, the experimental approaches used during the investigation of …

In the present work, the first data on the adsorption behavior of petroleum vanadyl
porphyrins in the presence and absence of asphaltenes are afforded. As adsorptives, N, N …

The resins and asphaltenes of three heavy oils differing in origin (Permian and
Carboniferous) and vanadium content (0.025–0.165 wt%) have been studied as sources for …