SciTech Connect

Title: VAPOR PRESSURES AND HEATS OF VAPORIZATION OF PRIMARY COAL TARS

VAPOR PRESSURES AND HEATS OF VAPORIZATION OF PRIMARY COAL TARS This project had as its main focus the determination of vapor pressures of coal pyrolysis tars. It involved performing measurements of these vapor pressures and from them, developing vapor pressure correlations suitable for use in advanced pyrolysis models (those models which explicitly account for mass transport limitations). This report is divided into five main chapters. Each chapter is a relatively stand-alone section. Chapter A reviews the general nature of coal tars and gives a summary of existing vapor pressure correlations for coal tars and model compounds. Chapter B summarizes the main experimental approaches for coal tar preparation and characterization which have been used throughout the project. Chapter C is concerned with the selection of the model compounds for coal pyrolysis tars and reviews the data available to us on the vapor pressures of high boiling point aromatic compounds. This chapter also deals with the question of identifying factors that govern the vapor pressures of coal tar model materials and their mixtures. Chapter D covers the vapor pressures and heats of vaporization of primary cellulose tars. Chapter E discusses the results of the main focus of this study. In summary, this work provides improved understanding of the volatility of coal and more » cellulose pyrolysis tars. It has resulted in new experimentally verified vapor pressure correlations for use in pyrolysis models. Further research on this topic should aim at developing general vapor pressure correlations for all coal tars, based on their molecular weight together with certain specific chemical characteristics i.e. hydroxyl group content. « less
Authors: ;
Publication Date:
OSTI Identifier:774960
Report Number(s):DE--FG22-92PC92544-18
TRN: AH200110%%12
DOE Contract Number:FG22-92PC92544
Resource Type:Technical Report
Data Type:
Resource Relation:Other Information: PBD: 1 Jul 1997
Research Org:Federal Energy Technology Center, Morgantown, WV (US); Federal Energy Technology Center, Pittsburgh, PA (US)
Sponsoring Org:US Department of Energy (US)
Country of Publication:United States
Language:English
Subject: 01 COAL, LIGNITE, AND PEAT; 09 BIOMASS FUELS; VAPORIZATION HEAT; COAL; COAL TAR; MOLECULAR WEIGHT; PYROLYSIS; VAPOR PRESSURE; CELLULOSE; PYROLYSIS PRODUCTS