skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Optimization of biogenic methane production from coal

Abstract

Given continuously increasing global energy needs, diversified efforts have been made to find and exploit new natural gas resources. These include coalbed methane (CBM), which represents an important global, unconventional source of natural gas. Efforts have been underway for some time to more effectively generate methane in-situ in coal plays by introduction of nutrients and/or microbial consortia. However, much is still to be learned about the limitations and environmental conditions that support microbial growth and are conducive to biogenic methane production from coal. Here we evaluated environmental conditions that led to increased methane production from subbituminous coal by introducing a foreign methanogenic consortium that included Methanobacterium sp. Furthermore, we used a central composite design (CCD) to explore a broad range of operational conditions, examine the effects of the important environmental factors, such as temperature, pH and salt concentration, and query a feasible region of operation to maximize methane production from coal. An anticipated detrimental effect of NaCl concentration on methane production was observed for the consortium assessed. The range of feasible operational conditions comprised initial pH values between 4.2 and 6.8, temperatures between 23 °C and 37 °C, and NaCl concentrations between 3.7 mg/cm 3 and 9.0 mg/cm 3. Coalmore » biogasification was optimal for this consortium at an initial pH value of 5.5, at 30 °C, and at a NaCl concentration 3.7 mg/cm 3 (i.e., 145,165 ppm, which is 25.6 sft 3/ton).« less

Authors:
 [1]; ORCiD logo [1];  [2];  [3];  [4];  [4]
  1. Univ. of Utah, Salt Lake City, UT (United States). Dept. of Chemical Engineering
  2. Univ. of Utah, Salt Lake City, UT (United States). Dept. of Chemical Engineering; Energy and Geoscience Inst., Salt Lake City, UT (United States)
  3. Inotec Inc., Salt Lake City, UT (United States)
  4. Univ. of Utah, Salt Lake City, UT (United States). Dept. of Materials Science Engineering
Publication Date:
Research Org.:
Univ. of Utah, Salt Lake City, UT (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1415144
Alternate Identifier(s):
OSTI ID: 1549275
Grant/Contract Number:  
FE0024088
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
International Journal of Coal Geology
Additional Journal Information:
Journal Volume: 183; Journal Issue: C; Journal ID: ISSN 0166-5162
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; Optimization; Microbial consortium; Methanogenesis; CBM; Methane

Citation Formats

Fuertez, John, Nguyen, Van, McLennan, John D., Adams, D. Jack, Han, Kyu-Bum, and Sparks, Taylor D. Optimization of biogenic methane production from coal. United States: N. p., 2017. Web. doi:10.1016/j.coal.2017.09.014.
Fuertez, John, Nguyen, Van, McLennan, John D., Adams, D. Jack, Han, Kyu-Bum, & Sparks, Taylor D. Optimization of biogenic methane production from coal. United States. doi:10.1016/j.coal.2017.09.014.
Fuertez, John, Nguyen, Van, McLennan, John D., Adams, D. Jack, Han, Kyu-Bum, and Sparks, Taylor D. Fri . "Optimization of biogenic methane production from coal". United States. doi:10.1016/j.coal.2017.09.014. https://www.osti.gov/servlets/purl/1415144.
@article{osti_1415144,
title = {Optimization of biogenic methane production from coal},
author = {Fuertez, John and Nguyen, Van and McLennan, John D. and Adams, D. Jack and Han, Kyu-Bum and Sparks, Taylor D.},
abstractNote = {Given continuously increasing global energy needs, diversified efforts have been made to find and exploit new natural gas resources. These include coalbed methane (CBM), which represents an important global, unconventional source of natural gas. Efforts have been underway for some time to more effectively generate methane in-situ in coal plays by introduction of nutrients and/or microbial consortia. However, much is still to be learned about the limitations and environmental conditions that support microbial growth and are conducive to biogenic methane production from coal. Here we evaluated environmental conditions that led to increased methane production from subbituminous coal by introducing a foreign methanogenic consortium that included Methanobacterium sp. Furthermore, we used a central composite design (CCD) to explore a broad range of operational conditions, examine the effects of the important environmental factors, such as temperature, pH and salt concentration, and query a feasible region of operation to maximize methane production from coal. An anticipated detrimental effect of NaCl concentration on methane production was observed for the consortium assessed. The range of feasible operational conditions comprised initial pH values between 4.2 and 6.8, temperatures between 23 °C and 37 °C, and NaCl concentrations between 3.7 mg/cm3 and 9.0 mg/cm3. Coal biogasification was optimal for this consortium at an initial pH value of 5.5, at 30 °C, and at a NaCl concentration 3.7 mg/cm3 (i.e., 145,165 ppm, which is 25.6 sft3/ton).},
doi = {10.1016/j.coal.2017.09.014},
journal = {International Journal of Coal Geology},
issn = {0166-5162},
number = C,
volume = 183,
place = {United States},
year = {2017},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

Save / Share: