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Please note, we are experiencing high volume submissions; you will receive confirmations of submissions in due course. Data upload (DOI): https://researchdata.up.ac.za/ UPSpace: https://repository.up.ac.za/handle/2263/51914
Characterization of medium-temperature Sasol-Lurgi gasifier coal tar pitch
Papole, Gedion; Focke, Walter Wilhelm; Manyala, Ncholu I.
Medium-temperature gasifier pitch (MTP) is only partly soluble in acetonitrile, methanol and
ethanol. Single-stage pitch extraction with a large quantity of methanol yielded two liquid
phases containing 76 wt. % and 27 wt. % pitch respectively. The pitch fractions recovered
from these two phases featured similar aromaticity indices. However, the pitch from the
pitch-rich phase had a higher average molar mass and gave an improved carbon yield at 1000
°C. Analysis of the methanol-insoluble pitch fraction showed that methanol extraction at
reflux temperatures effectively removed boronic acid model compounds from pitch samples
spiked with the same.