Determination of molecular weight distributions of polymerized petroleum pitch by gel permeation chromatography with quinoline eluent

Abstract

A significant advantage peculiar to this industry is that practically all of the radiologically "hot" sample components are separated from the solution that is actually injected into the ion chromatograph. This means that the instrument does not become contaminated with radionuclides to the extent that it would with direct sample injection. This significantly reduces personnel exposure to radiation and in practice saves the trouble and expense of trying to clean up or replace (and correctly dispose of) the "hot" columns.

Possibilities and pitfalls in analyzing (upgraded) pyrolysis oil by size exclusion chromatography (SEC)

“…A comprehensive overview on SEC can be found elsewhere [8,9]. However, this technique was also used to analyze oils from different sources, including coal [10], petroleum [11][12][13][14], plastic wastes [15][16][17][18], lignins [19][20][21][22][23] and biomass like (upgraded) pyrolysis oil [6,18,[24][25][26][27][28][29][30]. The interpretation of the SEC chromatograms of biomass-derived samples is not so straightforward as for polymers, since there is a lack of appropriate standards.…”

Analysis of Bio‐Oils

“…The interactions between the column packing and solute are partly responsible for the lower than expected molecular weights as observed, for example, for aromatics. Garcia-Perez et al [20] and Greinke and O'Conner point out [26] a relation between the solvent polarity and the degree of interaction between the column packing and solute. Since the column used for pyrolysis oil analyses is usually a co-polymer of styrene and di-vinyl benzene [27], the affinity of non-polar compounds to the column packing is expected to increase as solvent polarity increases.…”

Novel reforming of pyrolized fuel oil by electron beam radiation for pitch production

“…Pitches are solid, fusible residues that are typically produced from coal, petroleum, and pure compounds [1]. Petroleum-based pitches are a low-priced raw material and are widely used in the manufacture of important industrial products for a wide range of carbon products, including carbon electrodes, high thermal conductivity carbon fibers, and the matrix phase of carbon-carbon composites [2][3][4].…”