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Zhao W, Zhao D, Wang K, Fan L, Zhao Z, Dong H, Shu L. Will greenhouse gas emissions increase with mining depth in coal mines? An analysis of gas occurrence under varying in-situ stress conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 945:173957. [PMID: 38901602 DOI: 10.1016/j.scitotenv.2024.173957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 05/14/2024] [Accepted: 06/10/2024] [Indexed: 06/22/2024]
Abstract
The rapid development of the economy leads to the high demand for deep coal resources, which further poses the potential problem of deep gas (or methane) emissions. The clarification of deep gas occurrence law for coal mines provides theoretical and data support for methane emission predictions, and assists industrial and mining enterprises in planning targeted emission reduction measures. This study defined and verified the existence of a critical depth for the deep gas occurrence in coal mines based on a multiple-scale case study of how the gas occurrence is associated with depth and stress status changes in the Pingdingshan No.8 Coal Mine. In addition, 882 sets of gas content data from 7 major mining areas in China were collected and their gas content distributions among various depths were statistically analyzed to prove the universal existence of critical depth. The results show that the critical depth of Pingdingshan No.8 Coal Mine is 509 m, and the critical depth of other Chinese areas is about 400 to 1000 m. Significant differences were observed in the pore space, surface, and gas desorption characteristics for coal samples with different depths and stress states. The pore structure in the critical depth area is relatively developed, and gas is easily accumulated. The gas occurrence of both normal and abnormal gas gradually increases with the depth's increase in areas above the critical depth, whereas the gas occurrence gradually decreases for areas below the critical depth, showing that the existence of critical depth lead to significant deviations in gas emission predictions. The results provide a fundamental reference for gas emission prediction, greenhouse effect assessment, and carbon emission factor calculation and indicate that using the traditional linear method may be misleading for evaluating deep gas occurrence and emission.
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Affiliation(s)
- Wei Zhao
- School of Emergency Management and Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China; Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining & Technology (Beijing), Beijing, 100083, China
| | - Dan Zhao
- School of Emergency Management and Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China; Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining & Technology (Beijing), Beijing, 100083, China
| | - Kai Wang
- School of Emergency Management and Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China; Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining & Technology (Beijing), Beijing, 100083, China.
| | - Long Fan
- College of Engineering and Mines, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
| | - Zhihu Zhao
- School of Emergency Management and Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China; Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining & Technology (Beijing), Beijing, 100083, China
| | - Huzi Dong
- School of Emergency Management and Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China; Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining & Technology (Beijing), Beijing, 100083, China
| | - Longyong Shu
- China Coal Research Institute, Beijing 100013, China
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2
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Wang X, Chen B, Dong G, Zhang N, Liu W, Han J, Liu CQ, Li SL, Eiler JM, Xu S. Microbial contribution estimated by clumped isotopologues ( 13CH 3D and 12CH 2D 2) characteristics in a CO 2 enhanced coal bed methane reservoir. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 922:170926. [PMID: 38354811 DOI: 10.1016/j.scitotenv.2024.170926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 02/07/2024] [Accepted: 02/10/2024] [Indexed: 02/16/2024]
Abstract
Carbon capture and storage (CCS) of CO2 is a key technology for substantially mitigating global greenhouse gas emissions. Determining the biogeochemical processes in host rocks after CO2 injection informs the viability of carbon storage as a long-term sink for CO2, the complexity of reservoir CH4 cycling, as well as the direct and indirect environmental impacts of this strategy. The doubly substituted ('clumped') isotopologues of methane (13CH3D and 12CH2D2) provide novel insights into methane origins and post-generation processing. Here, we report the chemical compositions of hydrocarbons (C1/C2+ molecular ratios), and methane bulk and clumped isotopes (δ13C, δD, Δ13CH3D and Δ12CH2D2) of a CO2 enhanced coal bed methane recovery (CO2-ECBM) area in Qinshui basin, China and is an analogue for carbon capture and storage. The clumped isotopologue compositions observed in the study area are generally consistent with a range of temperatures spanning 73 to 193 °C. The range in apparent temperature and correlations among clumped and bulk isotopic indices are best explained by mixing between a high maturity thermogenic methane (high in δ13C and δD, with a clumped isotope composition equilibrated near ∼249 °C) and biogenic methane formed or processed in the reservoir (low in δ13C and δD, with a clumped isotope composition equilibrated near 16-27 °C). We hypothesize that the biogenic endmember may result from slow methanogenesis and/or anaerobic oxidation of methane (AOM). This study demonstrates that the potential of methane clumped isotope approach to identify in situ microbial metabolic processes and their association with carbon cycling in CO2-ECBM area, improving our understanding of biogeochemical mechanisms in analogous geological reservoirs.
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Affiliation(s)
- Xinchu Wang
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Biying Chen
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Guannan Dong
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA
| | - Naizhong Zhang
- Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Weiyi Liu
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA
| | - Jiaxu Han
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China
| | - Cong-Qiang Liu
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China; Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300072, China.
| | - Si-Liang Li
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China; Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300072, China
| | - John M Eiler
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA
| | - Sheng Xu
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China.
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3
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Greule M, Le PM, Meija J, Mester Z, Keppler F. Comparison of Carbon Isotope Ratio Measurement of the Vanillin Methoxy Group by GC-IRMS and 13C-qNMR. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024; 35:100-105. [PMID: 38015023 PMCID: PMC10767744 DOI: 10.1021/jasms.3c00327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 11/07/2023] [Accepted: 11/09/2023] [Indexed: 11/29/2023]
Abstract
Site-specific carbon isotope ratio measurements by quantitative 13C NMR (13C-qNMR), Orbitrap-MS, and GC-IRMS offer a new dimension to conventional bulk carbon isotope ratio measurements used in food provenance, forensics, and a number of other applications. While the site-specific measurements of carbon isotope ratios in vanillin by 13C-qNMR or Orbitrap-MS are powerful new tools in food analysis, there are a limited number of studies regarding the validity of these measurement results. Here we present carbon site-specific measurements of vanillin by GC-IRMS and 13C-qNMR for methoxy carbon. Carbon isotope delta (δ13C) values obtained by these different measurement approaches demonstrate remarkable agreement; in five vanillin samples whose bulk δ13C values ranged from -31‰ to -26‰, their δ13C values of the methoxy carbon ranged from -62.4‰ to -30.6‰, yet the difference between the results of the two analytical approaches was within ±0.6‰. While the GC-IRMS approach afforded up to 9-fold lower uncertainties and required 100-fold less sample compared to the 13C-qNMR, the 13C-qNMR is able to assign δ13C values to all carbon atoms in the molecule, not just the cleavable methoxy group.
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Affiliation(s)
- Markus Greule
- Institute
of Earth Sciences, Heidelberg University, Im Neuenheimer Feld 234-236, 69120 Heidelberg, Germany
| | - Phuong Mai Le
- Metrology, National
Research Council Canada, 1200 Montreal Road, Ottawa, ON K1A
0R6, Canada
| | - Juris Meija
- Metrology, National
Research Council Canada, 1200 Montreal Road, Ottawa, ON K1A
0R6, Canada
| | - Zoltán Mester
- Metrology, National
Research Council Canada, 1200 Montreal Road, Ottawa, ON K1A
0R6, Canada
| | - Frank Keppler
- Institute
of Earth Sciences, Heidelberg University, Im Neuenheimer Feld 234-236, 69120 Heidelberg, Germany
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4
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Lloyd MK, Stein RA, Ibarra DE, Barclay RS, Wing SL, Stahle DW, Dawson TE, Stolper DA. Isotopic clumping in wood as a proxy for photorespiration in trees. Proc Natl Acad Sci U S A 2023; 120:e2306736120. [PMID: 37931112 PMCID: PMC10655223 DOI: 10.1073/pnas.2306736120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 09/22/2023] [Indexed: 11/08/2023] Open
Abstract
Photorespiration can limit gross primary productivity in terrestrial plants. The rate of photorespiration relative to carbon fixation increases with temperature and decreases with atmospheric [CO2]. However, the extent to which this rate varies in the environment is unclear. Here, we introduce a proxy for relative photorespiration rate based on the clumped isotopic composition of methoxyl groups (R-O-CH3) in wood. Most methoxyl C-H bonds are formed either during photorespiration or the Calvin cycle and thus their isotopic composition may be sensitive to the mixing ratio of these pathways. In water-replete growing conditions, we find that the abundance of the clumped isotopologue 13CH2D correlates with temperature (18-28 °C) and atmospheric [CO2] (280-1000 ppm), consistent with a common dependence on relative photorespiration rate. When applied to a global dataset of wood, we observe global trends of isotopic clumping with climate and water availability. Clumped isotopic compositions are similar across environments with temperatures below ~18 °C. Above ~18 °C, clumped isotopic compositions in water-limited and water-replete trees increasingly diverge. We propose that trees from hotter climates photorespire substantially more than trees from cooler climates. How increased photorespiration is managed depends on water availability: water-replete trees export more photorespiratory metabolites to lignin whereas water-limited trees either export fewer overall or direct more to other sinks that mitigate water stress. These disparate trends indicate contrasting responses of photorespiration rate (and thus gross primary productivity) to a future high-[CO2] world. This work enables reconstructing photorespiration rates in the geologic past using fossil wood.
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Affiliation(s)
- Max K. Lloyd
- Department of Earth and Planetary Science, University of California, Berkeley, CA94720
- Department of Geosciences, The Pennsylvania State University, University Park, PA16802
| | - Rebekah A. Stein
- Department of Earth and Planetary Science, University of California, Berkeley, CA94720
- Department of Chemistry and Physical Sciences, Quinnipiac University, Hamden, CT06518
| | - Daniel E. Ibarra
- Department of Earth and Planetary Science, University of California, Berkeley, CA94720
- Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI02912
| | - Richard S. Barclay
- Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC20560
| | - Scott L. Wing
- Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC20560
| | - David W. Stahle
- Department of Geosciences, University of Arkansas, Fayetteville, AR72701
| | - Todd E. Dawson
- Department of Integrative Biology, University of California, Berkeley, CA94720
| | - Daniel A. Stolper
- Department of Earth and Planetary Science, University of California, Berkeley, CA94720
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5
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Bao Y, Hu Y, Huang H, Meng J, Zheng R. Evidence of Coal Biodegradation from Coalbed-Produced Water - A Case Study of Dafosi Gas Field, Ordos Basin, China. ACS OMEGA 2023; 8:41885-41896. [PMID: 37969973 PMCID: PMC10633850 DOI: 10.1021/acsomega.3c06835] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 11/17/2023]
Abstract
Bioconversion of coal to methane occurs in the coalbed aquifer environment. To investigate the evidence of coal biodegradation from coalbed-produced water, we collected six field water samples from the Dafosi gas field and prepared one laboratory-simulated water sample and one indoor anaerobic microbial degradation sample with the highest compound concentration as the two reference standards. Gas chromatography-mass spectrometry was used to detect the organic compound type, concentration, and differences in the biomarker compound sensitivity. Results indicate that extracted organic matter from coalbed-produced water samples can be evidence of biodegradation. Variations in range compounds (such as n-alkanes, tri- and pentacyclic terpenes, and steranes) and their sensitivity confirmed active microbial degradation in the studied area. A positive correlation between the n-alkanes content in the coalbed-produced water and the stable carbon isotope value of methane further verifies that the n-alkanes are primary substrates for maintaining microbial activity. Therefore, evidence including n-alkanes, tri- and pentacyclic terpenes, steranes, unresolved complex mixtures, and stable carbon isotope composition of methane contribute to biogenic methane generation in situ. Our limited data suggest that managing soluble organic matter in the coalbed-produced water may provide a viable route for coal biodegradation since most microorganisms survive within the coal seam water.
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Affiliation(s)
- Yuan Bao
- Xi’an
University of Science and Technology, College
of Geology and Environment, Xi’an 710054, China
| | - Yiliang Hu
- Xi’an
University of Science and Technology, College
of Geology and Environment, Xi’an 710054, China
| | - Haiping Huang
- University
of Calgary, Department of Geoscience, Calgary, AB T2N 1N4, Canada
| | - Jiahao Meng
- Xi’an
University of Science and Technology, College
of Geology and Environment, Xi’an 710054, China
| | - Ruihui Zheng
- Xi’an
University of Science and Technology, College
of Geology and Environment, Xi’an 710054, China
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6
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Gropp J, Jin Q, Halevy I. Controls on the isotopic composition of microbial methane. SCIENCE ADVANCES 2022; 8:eabm5713. [PMID: 35385305 PMCID: PMC8985922 DOI: 10.1126/sciadv.abm5713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Accepted: 02/15/2022] [Indexed: 06/14/2023]
Abstract
Microbial methane production (methanogenesis) is responsible for more than half of the annual emissions of this major greenhouse gas to the atmosphere. Although the stable isotopic composition of methane is often used to characterize its sources and sinks, strictly empirical descriptions of the isotopic signature of methanogenesis currently limit these attempts. We developed a metabolic-isotopic model of methanogenesis by carbon dioxide reduction, which predicts carbon and hydrogen isotopic fractionations, and clumped isotopologue distributions, as functions of the cell's environment. We mechanistically explain multiple isotopic patterns in laboratory and natural settings and show that these patterns constrain the in situ energetics of methanogenesis. Combining our model with data from environments in which methanogenic activity is energy-limited, we provide predictions for the biomass-specific methanogenesis rates and the associated isotopic effects.
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Affiliation(s)
- Jonathan Gropp
- Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Qusheng Jin
- Department of Earth Sciences, University of Oregon, Eugene, OR, USA
| | - Itay Halevy
- Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel
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7
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Lee JA, Stolyar S, Marx CJ. Aerobic Methoxydotrophy: Growth on Methoxylated Aromatic Compounds by Methylobacteriaceae. Front Microbiol 2022; 13:849573. [PMID: 35359736 PMCID: PMC8963497 DOI: 10.3389/fmicb.2022.849573] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 02/16/2022] [Indexed: 11/18/2022] Open
Abstract
Pink-pigmented facultative methylotrophs have long been studied for their ability to grow on reduced single-carbon (C1) compounds. The C1 groups that support methylotrophic growth may come from a variety of sources. Here, we describe a group of Methylobacterium strains that can engage in methoxydotrophy: they can metabolize the methoxy groups from several aromatic compounds that are commonly the product of lignin depolymerization. Furthermore, these organisms can utilize the full aromatic ring as a growth substrate, a phenotype that has rarely been described in Methylobacterium. We demonstrated growth on p-hydroxybenzoate, protocatechuate, vanillate, and ferulate in laboratory culture conditions. We also used comparative genomics to explore the evolutionary history of this trait, finding that the capacity for aromatic catabolism is likely ancestral to two clades of Methylobacterium, but has also been acquired horizontally by closely related organisms. In addition, we surveyed the published metagenome data to find that the most abundant group of aromatic-degrading Methylobacterium in the environment is likely the group related to Methylobacterium nodulans, and they are especially common in soil and root environments. The demethoxylation of lignin-derived aromatic monomers in aerobic environments releases formaldehyde, a metabolite that is a potent cellular toxin but that is also a growth substrate for methylotrophs. We found that, whereas some known lignin-degrading organisms excrete formaldehyde as a byproduct during growth on vanillate, Methylobacterium do not. This observation is especially relevant to our understanding of the ecology and the bioengineering of lignin degradation.
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Affiliation(s)
- Jessica A. Lee
- Department of Biological Sciences, University of Idaho, Moscow, ID, United States
- Institute for Modeling Collaboration and Innovation, University of Idaho, Moscow, ID, United States
- Institute for Interdisciplinary Data Sciences, University of Idaho, Moscow, ID, United States
- Space Biosciences Research Branch, NASA Ames Research Center, Moffett Field, CA, United States
- *Correspondence: Jessica A. Lee,
| | - Sergey Stolyar
- Department of Biological Sciences, University of Idaho, Moscow, ID, United States
- Institute for Modeling Collaboration and Innovation, University of Idaho, Moscow, ID, United States
- Institute for Interdisciplinary Data Sciences, University of Idaho, Moscow, ID, United States
| | - Christopher J. Marx
- Department of Biological Sciences, University of Idaho, Moscow, ID, United States
- Institute for Modeling Collaboration and Innovation, University of Idaho, Moscow, ID, United States
- Institute for Interdisciplinary Data Sciences, University of Idaho, Moscow, ID, United States
- Christopher J. Marx,
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8
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Keppler F. A surprise from the deep. Science 2021; 374:821-822. [PMID: 34762483 DOI: 10.1126/science.abm6027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Frank Keppler
- Biogeochemistry Group, Institute of Earth Sciences, Heidelberg University, Heidelberg, Germany.,Heidelberg Center for the Environment (HCE), Heidelberg University, Heidelberg, Germany
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