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Title: Effects of low-temperature catalytic pretreatments on coal structure and reactivity in liquefaction

Abstract

This work is a fundamental study of catalytic pretreatments as a potential preconversion step to low-severity liquefaction. The ultimate goal of this work is to provide the basis for the design of an improved liquefaction process and to facilitate our understanding of those processes that occur when coals are initially dissolved. The main objectives of this project are to study the effects of low-temperature pretreatments on coal structure and their impacts on the subsequent liquefaction. The effects of pretreatment temperatures, catalyst type, coal rank and influence of solvent will be examined. We have made significant progress in the following four aspects during this quarterly period: (1) influence of drying and oxidation of coal on the conversion and product distribution in catalytic liquefaction of Wyodak subbituminous coal using a dispersed catalyst; (2) spectroscopic characterization of dried and oxidized Wyodak coal and the insoluble residues from catalytic and thermal liquefaction; (3) the structural alteration of low-rank coal in low-severity liquefaction with the emphasis on the oxygen-containing functional groups; and (4) effects of solvents and catalyst dispersion methods in temperature-programmed and non-programmed liquefaction of three low-rank coals.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Pennsylvania State Univ., University Park, PA (United States). Dept. of Materials Science and Engineering
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6765242
Report Number(s):
DOE/PC/91042-T4
ON: DE93014941
DOE Contract Number:  
AC22-91PC91042
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL LIQUEFACTION; CATALYSTS; COAL PREPARATION; SUBBITUMINOUS COAL; DRYING; STRUCTURAL CHEMICAL ANALYSIS; CHEMICAL REACTION KINETICS; DECALIN; EXPERIMENTAL DATA; FOURIER TRANSFORMATION; GAS CHROMATOGRAPHY; HEAT TREATMENTS; INFRARED SPECTRA; MASS SPECTROSCOPY; NMR SPECTRA; ORGANIC SOLVENTS; PROGRESS REPORT; PYROLYSIS; TETRALIN; ALKANES; AROMATICS; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; CHROMATOGRAPHY; COAL; CYCLOALKANES; DATA; DECOMPOSITION; DOCUMENT TYPES; ENERGY SOURCES; FOSSIL FUELS; FUELS; HYDROAROMATICS; HYDROCARBONS; INFORMATION; INTEGRAL TRANSFORMATIONS; KINETICS; LIQUEFACTION; MATERIALS; NUMERICAL DATA; ORGANIC COMPOUNDS; REACTION KINETICS; SEPARATION PROCESSES; SOLVENTS; SPECTRA; SPECTROSCOPY; THERMOCHEMICAL PROCESSES; TRANSFORMATIONS; 010405* - Coal, Lignite, & Peat- Hydrogenation & Liquefaction; 010600 - Coal, Lignite, & Peat- Properties & Composition

Citation Formats

Song, C, Saini, A K, Wenzel, K, Huang, L, Hatcher, P G, and Schobert, H H. Effects of low-temperature catalytic pretreatments on coal structure and reactivity in liquefaction. United States: N. p., 1993. Web. doi:10.2172/6765242.
Song, C, Saini, A K, Wenzel, K, Huang, L, Hatcher, P G, & Schobert, H H. Effects of low-temperature catalytic pretreatments on coal structure and reactivity in liquefaction. United States. https://doi.org/10.2172/6765242
Song, C, Saini, A K, Wenzel, K, Huang, L, Hatcher, P G, and Schobert, H H. 1993. "Effects of low-temperature catalytic pretreatments on coal structure and reactivity in liquefaction". United States. https://doi.org/10.2172/6765242. https://www.osti.gov/servlets/purl/6765242.
@article{osti_6765242,
title = {Effects of low-temperature catalytic pretreatments on coal structure and reactivity in liquefaction},
author = {Song, C and Saini, A K and Wenzel, K and Huang, L and Hatcher, P G and Schobert, H H},
abstractNote = {This work is a fundamental study of catalytic pretreatments as a potential preconversion step to low-severity liquefaction. The ultimate goal of this work is to provide the basis for the design of an improved liquefaction process and to facilitate our understanding of those processes that occur when coals are initially dissolved. The main objectives of this project are to study the effects of low-temperature pretreatments on coal structure and their impacts on the subsequent liquefaction. The effects of pretreatment temperatures, catalyst type, coal rank and influence of solvent will be examined. We have made significant progress in the following four aspects during this quarterly period: (1) influence of drying and oxidation of coal on the conversion and product distribution in catalytic liquefaction of Wyodak subbituminous coal using a dispersed catalyst; (2) spectroscopic characterization of dried and oxidized Wyodak coal and the insoluble residues from catalytic and thermal liquefaction; (3) the structural alteration of low-rank coal in low-severity liquefaction with the emphasis on the oxygen-containing functional groups; and (4) effects of solvents and catalyst dispersion methods in temperature-programmed and non-programmed liquefaction of three low-rank coals.},
doi = {10.2172/6765242},
url = {https://www.osti.gov/biblio/6765242}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Apr 01 00:00:00 EST 1993},
month = {Thu Apr 01 00:00:00 EST 1993}
}