Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Help
Clear All

Query Builder

Query box

Help
Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Low-temperature evolution of hydrocarbon gases from coal

Filetype[PDF-1.03 MB]


  • English
    • Details You May Also Like

    Details:

    • Personal Author:
      Kim, Ann G.
    • Corporate Authors:
      United States. Bureau of Mines.
    • Description:
      "Hydrocarbon gases, primarily methane but also the c2 through c5 paraffins, the c2 and c3 olefins, and possibly the c4 and c5 olefins, are byproducts of coal formation. Although it is generally believed that coal formation occurred at temperatures below 200 deg c, most experimental work on gas formation from coal has been performed at temperatures between 200 deg and 1,000 deg c. The objective of this Bureau of Mines experiment was to determine if observable changes in the gases from coal could be produced at temperatures below 200 deg c in relatively short periods of time. The experiment involved heating coal samples from six coalbeds at constant temperatures and analyzing evolved gases. The composition of the gases at three temperatures was compared. At 35 deg c, over 99 pct of the gas is methane; at 125 deg and 150 deg c, methane constitutes approximately half of the hydrocarbon gas. Isobutane and pentane are the predominant higher hydrocarbons at temperatures between 100 deg and 150 deg c." - NIOSHTIC-2

      NIOSH no. 10000608

    • Subjects:
    • Series:
      Report of investigations (United States. Bureau of Mines) ; 7965
    • Document Type:
      Report
    • Collection(s):
    • Main Document Checksum:
    • Download URL:
    • File Type:

    Supporting Files

    • No Additional Files

    More +

    You May Also Like

    Checkout today's featured content at stacks.cdc.gov