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3 edition of Hydrogenation of Pitch From Low-Temperature Carbonization of Coal. found in the catalog.

Hydrogenation of Pitch From Low-Temperature Carbonization of Coal.

United States. Bureau of Mines.

Hydrogenation of Pitch From Low-Temperature Carbonization of Coal.

by United States. Bureau of Mines.

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Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesReport of investigations (United States. Bureau of Mines) -- 6124
ContributionsGraves, R., Kawa, W., Hiteshue, R.
ID Numbers
Open LibraryOL21742694M

Effects of Coal Ash in Combustion Processes Notes References Chapter 11 Carbonization Low-Temperature Carbonization High-Temperature Carbonization Coal Tar Processing Flash Pyrolysis Plasma Pyrolysis Formed Coke Notes References Chapter 12 Gasification Gasification Reactions Early and Current. Purchase Fuels and Fuel Technology - 2nd Edition. Print Book & E-Book. ISBN , Text node here in '{0}'. 22 The Carbonization of Coal in Laboratory Apparatus 23 Solid Fuels Derived from Coal—Low-Temperature Coke.

The desirability of associating hydrogenation with low temperature carbonization, to effect an increase of motor fuel by hydrogenating the tar acids, has been stressed by Gentry (), but Egloff and Morrell () see no reason at all why the tar acids should be removed from the motor fuel, as demanded by present standards.   The heavy fraction of light diesel oil, derived from petroleum naphtha catalytic cracking, was chosen as the additives in co-carbonization of medium coal tar pitch to modify the carbonization property. The results showed that the mesophase pitch optical structure changed from the original mosaic into a large-flow domain [15, 16].

  In this study, a low-temperature coal tar pitch (CTP1) was subjected to carbonization in order to study the formation, growth, and development of mesophase achieved under different conditions. The results were compared to those obtained with a petroleum pitch (PP) and a conventional high-temperature coal tar pitch (CTP2). CTP1 was converted to . USA US05/, USA USA US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords coal carbonization char liquefaction gas Prior art date Legal status (The legal status is an assumption and is not a .


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Hydrogenation of Pitch From Low-Temperature Carbonization of Coal by United States. Bureau of Mines. Download PDF EPUB FB2

Additional Physical Format: Online version: Graves, Richard D. Hydrogenation of pitch from low-temperature carbonization of coal (OCoLC) The coal-tar pitch gives on carbonization a distinctly larger amount of residue than the coal hydrogenation pitch mostly due to higher aromaticity. Higher mesophase and lower volatiles content in residue from CHP88 produced at a given soaking time proves greater reactivity of the pitch constituents.

The pitches, coal-tar pitch CTP and coal hydrogenation pitch CHP88 differ to a considerable extent in their chemical constitution, carbonization rate and anisotropic content of resultant semicoke [3,4].

It seemed interesting to recognize the carbonization behaviour of blend of the pitches as a possible raw material for electrode coke and Author: J. Machnikowski, S. Jasieńko, M. Malczewska, J. Petryniak. Hydrogenation of pitch from low-temperature carbonization of coal / By Richard D. Graves, Raymond W.

Hiteshue and Walter. Kawa Topics: Pitch., Coal. Earlier experiments had showed that cokery pitch, the pitch obtained from high-temperature carbonization of coal, was superior to coal itself as beginning material for hydrogenation.

In this low-temperature carbonization process, coal is heated at °F ( °C) to 1, °F ( °C) in the absence of air. These temperatures optimize the production of coal tars richer in lighter hydrocarbons than normal coal tar.

The Bergius process is a method of production of liquid hydrocarbons for use as synthetic fuel by hydrogenation of high-volatile bituminous coal at high temperature and pressure.

It was first developed by Friedrich Bergius in In Bergius was awarded the Nobel Prize in Chemistry for his development of high pressure chemistry. The transformation of the low temperature (°C) hydrogenation pitch occurred at a high rate leading to the coke of small size optical texture. The high temperature (°C) hydrogenation pitch produced on carbonization large, easily deformable anisotropic units, and the optical texture of resultant semicoke was comparable to that observed in.

Spinnable mesophase pitch with high pitch yield of more than 50 wt% was successfully prepared using direct bitumen coal extracted fraction through the three-step process of hydrogenation, N 2 blowing heat treatment, and thin-layer evaporation.

The prepared mesophase pitch was smoothly spun to the fibrous form and could be converted into mesophase pitch. Coal utilization - Coal utilization - Carbonization (coke making): Coke is the solid carbonaceous residue that remains after certain types of coal are heated to a high temperature out of contact with air.

The process of heating coal in this manner is referred to as carbonization or coke making. High-temperature carbonization, with which this section is concerned, is practiced to.

THE recent opening by the Duke of Kent of a new plant erected near Chesterfield by Messrs. Low Temperature Carbonisation Ltd. has once again directed public attention to the commercial.

The carbonization of an industrial coal-tar pitch was studied, by using a tube bomb, as a function of carbonization temperature ( °C– °C) and inert gas pressure (1–20 bar) and.

Characterization of Middle-Temperature Gasification Coal Tar. Part 2: Neutral Fraction by Extrography Followed by Gas Chromatography–Mass Spectrometry and Electrospray Ionization Coupled with Fourier Transform Ion Cyclotron Resonance Mass Spectrometry. Energy & Fuels26 (6),   China is one of the largest coal producers in the world and abundant coal tar is produced from coal gasification and carbonization every year.

Thus, catalytic hydrotreating coal tar for the production of clean fuel has received substantial attention. In this work, clean liquid fuel was obtained from the catalytic hydrogenation of a low temperature coal tar (LTCT). Chapter Prediction of Pitch Coke Anisotropy from Proximate Analysis and EPR Characterization of Pitches Chapter Tests of A Mechanism for H2s Release during Coal Pyrolysis Chapter Co-Carbonization of QI Free Pitches Derived from Coal Tar and Coal Hydrogenation Product Chapter A Study of Coal Utilization Process by Flash Pyrolysis.

Effect of electrolytic systems on electrochemical hydrogenation of mesophase coal tar pitch Article in Fuel Processing Technology 80(1). Machnikowski et al. 16–18 have also stressed the importance of hydrogenation of coal-tar pitch during the generation of mesophase product. The mesophase pitch was traditionally prepared by direct thermal condensation method 19–21 which had.

The proper hydrogenation of Hyper-coal (HPC) using 1,2,3,4-tetrahydroquinoline (THQ) was able to decrease the oxygen content and adjust the molecular structure of HPC for preparing the spinnable pitch with high softening point (SP).

The spinnable pitch prepared from the THQ-soluble (QS) fraction of HPC as a precursor consisted of more naphthenic carbon groups than. The Karrick process is a low-temperature carbonization process, where coal is heated at °F ( °C) to 1, °F ( °C) in the absence of air.

These temperatures optimize the production of coal tars richer in lighter hydrocarbons than normal coal tar. @article{osti_, title = {Comparison of coal and iron requirements between bituminous coal hydrogenation and low temperature carbonization (L.

C.) followed by hydrogenation}, author = {Not Available}, abstractNote = {Plants producingtons/yr aviation gasoline tons/yr of liquid petroleum gasoline (L.P.G.) by hydrogenation of coal. Silicon carbide nanoparticles (nSiC) have been used to modify coal tar pitch (CTP) as a carbon binder.

The influence of ceramic nanoparticles on the structure and microstructure was studied. The structure of CTP-based carbon residue with various nSiC contents was analyzed by using SEM with EDAX, Raman spectroscopy, and X-ray diffraction. The effect of ceramic nanofiller .Carbonization and hydrogenation of coal.

New York, United Nations, (OCoLC) Material Type: Government publication, International government publication: Document Type: Book: All Authors / Contributors: I G C Dryden; United Nations Industrial Development Organization.The phenol content of low-temperature carbonization tars was higher than from high-temperature coke ovens and the temperatures used in hydrogenation had been found to be particularly advantageous.

The yields, referred to coal, were about forty times as high with pressure hydrogenation as from coke ovens.