Log in

Relevant bibliographies by topics / CH4 oxidation / Journal articles

To see the other types of publications on this topic, follow the link: CH4 oxidation.

Journal articles on the topic 'CH4 oxidation'

Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'CH4 oxidation.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Liu, Shanfu, Sagar Udyavara, Chi Zhang, et al. "“Soft” oxidative coupling of methane to ethylene: Mechanistic insights from combined experiment and theory." Proceedings of the National Academy of Sciences 118, no. 23 (2021): e2012666118. http://dx.doi.org/10.1073/pnas.2012666118.

Full text

Abstract:

The oxidative coupling of methane to ethylene using gaseous disulfur (2CH4 + S2 → C2H4 + 2H2S) as an oxidant (SOCM) proceeds with promising selectivity. Here, we report detailed experimental and theoretical studies that examine the mechanism for the conversion of CH4 to C2H4 over an Fe3O4-derived FeS2 catalyst achieving a promising ethylene selectivity of 33%. We compare and contrast these results with those for the highly exothermic oxidative coupling of methane (OCM) using O2 (2CH4 + O2 → C2H4 + 2H2O). SOCM kinetic/mechanistic analysis, along with density functional theory results, indicate

APA, Harvard, Vancouver, ISO, and other styles

2

Preuss, I., C. Knoblauch, J. Gebert, and E. M. Pfeiffer. "Improved quantification of microbial CH<sub>4</sub> oxidation efficiency in arctic wetland soils using carbon isotope fractionation." Biogeosciences 10, no. 4 (2013): 2539–52. http://dx.doi.org/10.5194/bg-10-2539-2013.

Full text

Abstract:

Abstract. Permafrost-affected tundra soils are significant sources of the climate-relevant trace gas methane (CH4). The observed accelerated warming of the arctic will cause deeper permafrost thawing, followed by increased carbon mineralization and CH4 formation in water-saturated tundra soils, thus creating a positive feedback to climate change. Aerobic CH4 oxidation is regarded as the key process reducing CH4 emissions from wetlands, but quantification of turnover rates has remained difficult so far. The application of carbon stable isotope fractionation enables the in situ quantification of

APA, Harvard, Vancouver, ISO, and other styles

3

van Grinsven, Sigrid, Kirsten Oswald, Bernhard Wehrli, et al. "Methane oxidation in the waters of a humic-rich boreal lake stimulated by photosynthesis, nitrite, Fe(III) and humics." Biogeosciences 18, no. 10 (2021): 3087–101. http://dx.doi.org/10.5194/bg-18-3087-2021.

Full text

Abstract:

Abstract. Small boreal lakes are known to contribute significantly to global CH4 emissions. Lake Lovojärvi is a eutrophic lake in southern Finland with bottom water CH4 concentrations up to 2 mM. However, the surface water concentration, and thus the diffusive emission potential, was low (< 0.5 µM). We studied the biogeochemical processes involved in CH4 removal by chemical profiling and through incubation experiments. δ13C-CH4 profiling of the water column revealed a methane-oxidation hotspot just below the oxycline and zones of CH4 oxidation within the anoxic water column. In incubation e

APA, Harvard, Vancouver, ISO, and other styles

4

Nielsen, Cecilie Skov, Niles J. Hasselquist, Mats B. Nilsson, Mats Öquist, Järvi Järveoja, and Matthias Peichl. "A Novel Approach for High-Frequency in-situ Quantification of Methane Oxidation in Peatlands." Soil Systems 3, no. 1 (2018): 4. http://dx.doi.org/10.3390/soilsystems3010004.

Full text

Abstract:

Methane (CH4) oxidation is an important process for regulating CH4 emissions from peatlands as it oxidizes CH4 to carbon dioxide (CO2). Our current knowledge about its temporal dynamics and contribution to ecosystem CO2 fluxes is, however, limited due to methodological constraints. Here, we present the first results from a novel method for quantifying in-situ CH4 oxidation at high temporal resolution. Using an automated chamber system, we measured the isotopic signature of heterotrophic respiration (CO2 emissions from vegetation-free plots) at a boreal mire in northern Sweden. Based on these d

APA, Harvard, Vancouver, ISO, and other styles

5

Yoshimura, Masahiro, Jun-ichiro Kase, and Shigeyuki Sōmiya. "Oxidation of SiC powder by high-temperature, high-pressure H2O." Journal of Materials Research 1, no. 1 (1986): 100–103. http://dx.doi.org/10.1557/jmr.1986.0100.

Full text

Abstract:

The reaction between SiC powder and H2O has been studied at 400°–800 °C under 10 and 100 MPa. Silicon carbide reacted with H2O to yield amorphous SiO2 and CH4 by the reaction SiC + 2H2O→SiO2 + CH4 above 500 °C. Cristobalite and tridymite crystallized from amorphous silica after the almost complete oxidation of SiC above 700 °C. The oxidation rate, as calculated from the weight gain, increased with temperature and pressure. The Arrhenius plotting of the reaction rate based on a Jander-type model gave apparent activation energies of 167–194 kJ/mol. Contrasted with oxidation in oxidative atmosphe

APA, Harvard, Vancouver, ISO, and other styles

6

Nykänen, H., S. Peura, P. Kankaala, and R. I. Jones. "Recycling and fluxes of carbon gases in a stratified boreal lake following experimental carbon addition." Biogeosciences Discussions 11, no. 11 (2014): 16447–95. http://dx.doi.org/10.5194/bgd-11-16447-2014.

Full text

Abstract:

Abstract. Partly anoxic stratified humic lakes are important sources of methane (CH4) and carbon dioxide (CO2) to the atmosphere. We followed the fate of CH4 and CO2 in a small boreal stratified lake, Alinen Mustajärvi, during 2007–2009. In 2008 and 2009 the lake received additions of dissolved organic carbon (DOC) with stable carbon isotope ratio (δ13C) around 16‰ higher than that of local allochthonous DOC. Carbon transformations in the water column were studied by measurements of δ13C of CH4 and of the dissolved inorganic carbon (DIC). Furthermore, CH4 and CO2 production, consumption and em

APA, Harvard, Vancouver, ISO, and other styles

7

Zheng, Jianqiu, Taniya RoyChowdhury, Ziming Yang, Baohua Gu, Stan D. Wullschleger, and David E. Graham. "Impacts of temperature and soil characteristics on methane production and oxidation in Arctic tundra." Biogeosciences 15, no. 21 (2018): 6621–35. http://dx.doi.org/10.5194/bg-15-6621-2018.

Full text

Abstract:

Abstract. Rapid warming of Arctic ecosystems accelerates microbial decomposition of soil organic matter and leads to increased production of carbon dioxide (CO2) and methane (CH4). CH4 oxidation potentially mitigates CH4 emissions from permafrost regions, but it is still highly uncertain whether soils in high-latitude ecosystems will function as a net source or sink for CH4 in response to rising temperature and associated hydrological changes. We investigated CH4 production and oxidation potential in permafrost-affected soils from degraded ice-wedge polygons on the Barrow Environmental Observa

APA, Harvard, Vancouver, ISO, and other styles

8

Ren, Tie, John A. Amaral, and Roger Knowles. "The response of methane consumption by pure cultures of methanotrophic bacteria to oxygen." Canadian Journal of Microbiology 43, no. 10 (1997): 925–28. http://dx.doi.org/10.1139/m97-133.

Full text

Abstract:

The rates of CH4 oxidation by strains of groups I and II methanotrophs in pure culture were studied at various O2 concentrations from 0 to 63 % v/v. In the presence of nonlimiting dissolved CH4 and inorganic nitrogen, O2 concentrations from 0.45 to 20% v/v supported maximum rates of CH4 oxidation. The critical dissolved O2 concentration under our conditions was about 5.7 μM, below which O2 was limiting for CH4 oxidation. Concentrations of O2 up to 63% v/v depressed the activity of CH4 oxidation by ≥ 23%. We conclude that methanotrophs are not microaerophilic under the conditions of our experim

APA, Harvard, Vancouver, ISO, and other styles

9

Preuss, I., C. Knoblauch, J. Gebert, and E. M. Pfeiffer. "Improved quantification of microbial CH<sub>4</sub> oxidation efficiency in Arctic wetland soils using carbon isotope fractionation." Biogeosciences Discussions 9, no. 12 (2012): 16999–7035. http://dx.doi.org/10.5194/bgd-9-16999-2012.

Full text

Abstract:

Abstract. Permafrost-affected tundra soils are significant sources of the climate-relevant trace gas methane (CH4). The observed accelerated warming of the Arctic will cause a deeper permafrost thawing followed by increased carbon mineralization and CH4 formation in water saturated tundra soils which might cause a positive feedback to climate change. Aerobic CH4 oxidation is regarded as the key process reducing CH4 emissions from wetlands, but quantification of turnover rates has remained difficult so far. The application of carbon stable isotope fractionation enables the in situ quantificatio

APA, Harvard, Vancouver, ISO, and other styles

10

Martinez-Cruz, K., A. Sepulveda-Jauregui, K. Walter Anthony, and F. Thalasso. "Geographic and seasonal variation of dissolved methane and aerobic methane oxidation in Alaskan lakes." Biogeosciences Discussions 12, no. 5 (2015): 4213–43. http://dx.doi.org/10.5194/bgd-12-4213-2015.

Full text

Abstract:

Abstract. Methanotrophic bacteria play an important role oxidizing a significant fraction of methane (CH4) produced in lakes. Aerobic CH4 oxidation depends on lake CH4 and oxygen (O2) concentrations, temperature, and organic carbon input to lakes, including from thawing permafrost in thermokarst (thaw)-affected lakes. Given the large variability in these environmental factors, CH4 oxidation is expected to be subject to large seasonal and geographic variations, which have been scarcely reported in the literature. In the present study, we measured CH4 oxidation rates in 30 Alaskan lakes along a

APA, Harvard, Vancouver, ISO, and other styles

11

Sun, Jintao, Qi Chen, Baoming Zhao, et al. "Temperature-dependent ion chemistry in nanosecond discharge plasma-assisted CH₄ oxidation." Journal of Physics D: Applied Physics 55, no. 13 (2022): 135203. http://dx.doi.org/10.1088/1361-6463/ac45ac.

Full text

Abstract:

Abstract Ion chemistry with temperature evolution in weakly ionized plasma is important in plasma-assisted combustion and plasma-assisted catalysis, fuel reforming, and material synthesis due to its contribution to plasma generation and state transition. In this study, the kinetic roles of ionic reactions in nanosecond discharge (NSD) plasma-assisted temperature-dependent decomposition and oxidation of methane are investigated by integrated studies of experimental measurements and mathematical simulations. A detailed plasma chemistry mechanism governing the decomposition and oxidation processe

APA, Harvard, Vancouver, ISO, and other styles

12

Detweiler, Angela M., Brad M. Bebout, Adrienne E. Frisbee, Cheryl A. Kelley, Jeffrey P. Chanton, and Leslie E. Prufert-Bebout. "Characterization of methane flux from photosynthetic oxidation ponds in a wastewater treatment plant." Water Science and Technology 70, no. 6 (2014): 980–89. http://dx.doi.org/10.2166/wst.2014.317.

Full text

Abstract:

Photosynthetic oxidation ponds are a low-cost method for secondary treatment of wastewater using natural and more energy-efficient aeration strategies. Methane (CH4) is produced during the anaerobic digestion of organic matter, but only some of it is oxidized in the water column, with the remaining CH4 escaping into the atmosphere. In order to characterize the CH4 flux in two photosynthetic oxidation ponds in a wastewater treatment plant in northern California, the isotopic compositions and concentrations of CH4 were measured in the water column, in bubbles and in flux chambers, over a period

APA, Harvard, Vancouver, ISO, and other styles

13

Li, Jing, Xiaoqing Xu, Changling Liu, et al. "Active Methanotrophs and Their Response to Temperature in Marine Environments: An Experimental Study." Journal of Marine Science and Engineering 9, no. 11 (2021): 1261. http://dx.doi.org/10.3390/jmse9111261.

Full text

Abstract:

Aerobic methane (CH4) oxidation plays a significant role in marine CH4 consumption. Temperature changes resulting from, for example, global warming, have been suggested to be able to influence methanotrophic communities and their CH4 oxidation capacity. However, exact knowledge regarding temperature controls on marine aerobic methane oxidation is still missing. In this study, CH4 consumption and the methanotrophic community structure were investigated by incubating sediments from shallow (Bohai Bay) and deep marine environments (East China Sea) at 4, 15, and 28 °C for up to 250 days. The resul

APA, Harvard, Vancouver, ISO, and other styles

14

Michaelis, Tamara, Anja Wunderlich, Ömer K. Coskun, William Orsi, Thomas Baumann, and Florian Einsiedl. "High-resolution vertical biogeochemical profiles in the hyporheic zone reveal insights into microbial methane cycling." Biogeosciences 19, no. 18 (2022): 4551–69. http://dx.doi.org/10.5194/bg-19-4551-2022.

Full text

Abstract:

Abstract. Facing the challenges of climate change, policy making relies on sound greenhouse gas (GHG) budgets. Rivers and streams emit large quantities of the potent GHG methane (CH4), but their global impact on atmospheric CH4 concentrations is highly uncertain. In situ data from the hyporheic zone (HZ), where most CH4 is produced and some of it can be oxidized to CO2, are lacking for an accurate description of CH4 production and consumption in streams. To address this, we recorded high-resolution depth-resolved geochemical profiles at five different locations in the stream bed of the river M

APA, Harvard, Vancouver, ISO, and other styles

15

Zhang, G. B., Y. Ji, J. Ma, G. Liu, H. Xu, and K. Yagi. "Pathway of CH<sub>4</sub> production, fraction of CH<sub>4</sub> oxidized, and <sup>13</sup>C isotope fractionation in a straw incorporated rice field." Biogeosciences Discussions 9, no. 10 (2012): 14175–215. http://dx.doi.org/10.5194/bgd-9-14175-2012.

Full text

Abstract:

Abstract. Straw incorporation generally increases CH4 emission from rice fields, but its effects on the mechanism of CH4 emission, especially on the pathway of CH4 production and the fraction of CH4 oxidized are not well known. To investigate the methanogenic pathway, the fraction of CH4 oxidized as well as the stable carbon isotope fractionation during the oxidation and transport of CH4 as affected by straw incorporation, production and oxidation of CH4 in paddy soil and rice roots and δ13C-values of produced CH4 and CO2, and emitted CH4 were observed in incubation and field experiments. Stra

APA, Harvard, Vancouver, ISO, and other styles

16

Martinez-Cruz, K., A. Sepulveda-Jauregui, K. Walter Anthony, and F. Thalasso. "Geographic and seasonal variation of dissolved methane and aerobic methane oxidation in Alaskan lakes." Biogeosciences 12, no. 15 (2015): 4595–606. http://dx.doi.org/10.5194/bg-12-4595-2015.

Full text

Abstract:

Abstract. Methanotrophic bacteria play an important role oxidizing a significant fraction of methane (CH4) produced in lakes. Aerobic CH4 oxidation depends mainly on lake CH4 and oxygen (O2) concentrations, in such a manner that higher MO rates are usually found at the oxic/anoxic interface, where both molecules are present. MO also depends on temperature, and via methanogenesis, on organic carbon input to lakes, including from thawing permafrost in thermokarst (thaw)-affected lakes. Given the large variability in these environmental factors, CH4 oxidation is expected to be subject to large se

APA, Harvard, Vancouver, ISO, and other styles

17

Wu, Beibei, Beidou Xi, Xiaosong He, et al. "Methane Emission Reduction Enhanced by Hydrophobic Biochar-Modified Soil Cover." Processes 8, no. 2 (2020): 162. http://dx.doi.org/10.3390/pr8020162.

Full text

Abstract:

The microbial oxidation of CH4 in biochar-modified soil cover is considered a potent option for the mitigation of emissions from old landfills or sites containing wastes full of low CH4 generation rates. The mechanism of methane oxidizing bacteria (MOB) can be enhanced by amending the landfill cover soil with biochar, which is recalcitrant to biological degradation and can adsorb CH4 while facilitating the growth and activity of MOB within its porous structure. However, the increase in the permeability coefficient and water content of the cover due to the addition of biochar also affects the m

APA, Harvard, Vancouver, ISO, and other styles

18

Rose, Juliana Lundgren, Cláudio Fernando Mahler, and Ronaldo Luis dos Santos Izzo. "Comparison of the methane oxidation rate in four media." Revista Brasileira de Ciência do Solo 36, no. 3 (2012): 803–12. http://dx.doi.org/10.1590/s0100-06832012000300011.

Full text

Abstract:

Landfill gas emissions are one of the main sources of anthropogenic methane (CH4), a major greenhouse gas. In this paper, an economically attractive alternative to minimize greenhouse gas emissions from municipal solid waste landfills was sought. This alternative consists in special biofilters as landfill covers with oxidative capacity in the presence of CH4. To improve the quality/cost ratio of the project, compost was chosen as one of the cover substrates and soil (Typic red yellow-silt-clay Podzolic) as the other. The performance of four substrates was studied in laboratory experiments: mun

APA, Harvard, Vancouver, ISO, and other styles

19

Price, Sally J., Francis M. Kelliher, Robert R. Sherlock, Kevin R. Tate, and Leo M. Condron. "Environmental and chemical factors regulating methane oxidation in a New Zealand forest soil." Soil Research 42, no. 7 (2004): 767. http://dx.doi.org/10.1071/sr04026.

Full text

Abstract:

Tropospheric methane (CH4) is oxidised by soil microbes called methanotrophs. We examined them in soil samples from a pristine Nothofagus forest located in New Zealand. Laboratory incubations indicated the presence of high-affinity methanotrophs that displayed Michaelis–Menton kinetics (Km = 8.4 µL/L where Km is the substrate concentration at half the maximal rate). When the soil was dried from its field capacity water content of 0.34 to 0.16 m3/m3, CH4 oxidation rate increased nearly 7-fold. The methanotrophs were thus metabolically poised for very high activity, but substrate availability wa

APA, Harvard, Vancouver, ISO, and other styles

20

Zhang, G. B., Y. Ji, J. Ma, G. Liu, H. Xu, and K. Yagi. "Pathway of CH<sub>4</sub> production, fraction of CH<sub>4</sub> oxidized, and <sup>13</sup>C isotope fractionation in a straw-incorporated rice field." Biogeosciences 10, no. 5 (2013): 3375–89. http://dx.doi.org/10.5194/bg-10-3375-2013.

Full text

Abstract:

Abstract. Straw incorporation generally increases CH4 emission from rice fields, but its effects on the mechanism of CH4 emission, especially on the pathway of CH4 production and the fraction of CH4 oxidized, are not well known. To investigate the methanogenic pathway, the fraction of CH4 oxidized as well as the stable carbon isotope fractionation during the oxidation and transport of CH4 as affected by straw incorporation, observations were conducted of production and oxidation of CH4 in paddy soil and rice roots and δ13C-values of produced CH4 and CO2, and emitted CH4 in incubation and field

APA, Harvard, Vancouver, ISO, and other styles

21

Zhang, G. B., Y. Ji, J. Ma, H. Xu, and Z. C. Cai. "Case study on effects of water management and rice straw incorporation in rice fields on production, oxidation, and emission of methane during fallow and following rice seasons." Soil Research 49, no. 3 (2011): 238. http://dx.doi.org/10.1071/sr10117.

Full text

Abstract:

To investigate production, oxidation, and emission of methane (CH4) in rice fields during the fallow and following rice seasons as affected by water management and rice straw incorporation in the fallow season, field and incubation experiments were carried out from November 2007 to November 2008. Four treatments, i.e. two water managements (flooded and drained) and two rates of rice straw application (0 and 4.8 t/ha), were laid out in a randomised block design. Results show that obvious CH4 production occurred in flooded fields in the late fallow season; consequently, fallow CH4 emission contr

APA, Harvard, Vancouver, ISO, and other styles

22

Rigby, Matthew, Stephen A. Montzka, Ronald G. Prinn, et al. "Role of atmospheric oxidation in recent methane growth." Proceedings of the National Academy of Sciences 114, no. 21 (2017): 5373–77. http://dx.doi.org/10.1073/pnas.1616426114.

Full text

Abstract:

The growth in global methane (CH4) concentration, which had been ongoing since the industrial revolution, stalled around the year 2000 before resuming globally in 2007. We evaluate the role of the hydroxyl radical (OH), the major CH4 sink, in the recent CH4 growth. We also examine the influence of systematic uncertainties in OH concentrations on CH4 emissions inferred from atmospheric observations. We use observations of 1,1,1-trichloroethane (CH3CCl3), which is lost primarily through reaction with OH, to estimate OH levels as well as CH3CC3 emissions, which have uncertainty that previously li

APA, Harvard, Vancouver, ISO, and other styles

23

Chi, Zi-Fang, Wen-Jing Lu, Huai Li, and Hong-Tao Wang. "Dynamics of CH4 oxidation in landfill biocover soil: Effect of O2/CH4 ratio on CH4 metabolism." Environmental Pollution 170 (November 2012): 8–14. http://dx.doi.org/10.1016/j.envpol.2012.06.005.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Otsuka, Kiyoshi, Masaharu Hatano, and Takayuki Komatsu. "Synthesis of C2H4 by partial oxidation of CH4 over LiCl/NiO." Catalysis Today 4, no. 3-4 (1989): 409–19. http://dx.doi.org/10.1016/0920-5861(89)85037-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Tveit, Alexander Tøsdal, Tilman Schmider, Anne Grethe Hestnes, Matteus Lindgren, Alena Didriksen, and Mette Marianne Svenning. "Simultaneous Oxidation of Atmospheric Methane, Carbon Monoxide and Hydrogen for Bacterial Growth." Microorganisms 9, no. 1 (2021): 153. http://dx.doi.org/10.3390/microorganisms9010153.

Full text

Abstract:

The second largest sink for atmospheric methane (CH4) is atmospheric methane oxidizing-bacteria (atmMOB). How atmMOB are able to sustain life on the low CH4 concentrations in air is unknown. Here, we show that during growth, with air as its only source for energy and carbon, the recently isolated atmospheric methane-oxidizer Methylocapsa gorgona MG08 (USCα) oxidizes three atmospheric energy sources: CH4, carbon monoxide (CO), and hydrogen (H2) to support growth. The cell-specific CH4 oxidation rate of M. gorgona MG08 was estimated at ~0.7 × 10−18 mol cell−1 h−1, which, together with the oxidat

APA, Harvard, Vancouver, ISO, and other styles

26

Bradford, M. A., P. Ineson, P. A. Wookey, and H. M. Lappin-Scott. "Role of CH4 oxidation, production and transport in forest soil CH4 flux." Soil Biology and Biochemistry 33, no. 12-13 (2001): 1625–31. http://dx.doi.org/10.1016/s0038-0717(01)00078-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Prajapati, Aditya, Brianna A. Collins, Jason D. Goodpaster, and Meenesh R. Singh. "Fundamental insight into electrochemical oxidation of methane towards methanol on transition metal oxides." Proceedings of the National Academy of Sciences 118, no. 8 (2021): e2023233118. http://dx.doi.org/10.1073/pnas.2023233118.

Full text

Abstract:

Electrochemical oxidation of CH4 is known to be inefficient in aqueous electrolytes. The lower activity of methane oxidation reaction (MOR) is primarily attributed to the dominant oxygen evolution reaction (OER) and the higher barrier for CH4 activation on transition metal oxides (TMOs). However, a satisfactory explanation for the origins of such lower activity of MOR on TMOs, along with the enabling strategies to partially oxidize CH4 to CH3OH, have not been developed yet. We report here the activation of CH4 is governed by a previously unrecognized consequence of electrostatic (or Madelung)

APA, Harvard, Vancouver, ISO, and other styles

28

Morana, C., A. V. Borges, F. A. E. Roland, F. Darchambeau, J. P. Descy, and S. Bouillon. "Methanotrophy within the water column of a large meromictic tropical lake (Lake Kivu, East Africa)." Biogeosciences 12, no. 7 (2015): 2077–88. http://dx.doi.org/10.5194/bg-12-2077-2015.

Full text

Abstract:

Abstract. The permanently stratified Lake Kivu is one of the largest freshwater reservoirs of dissolved methane (CH4) on Earth. Yet CH4 emissions from its surface to the atmosphere have been estimated to be 2 orders of magnitude lower than the CH4 upward flux to the mixed layer, suggesting that microbial CH4 oxidation is an important process within the water column. A combination of natural abundance stable carbon isotope analysis (δ13C) of several carbon pools and 13CH4-labelling experiments was carried out during the rainy and dry season to quantify (i) the contribution of CH4-derived carbon

APA, Harvard, Vancouver, ISO, and other styles

29

Morana, C., A. V. Borges, F. A. E. Roland, F. Darchambeau, J. P. Descy, and S. Bouillon. "Methanotrophy within the water column of a large meromictic tropical lake (Lake Kivu, East Africa)." Biogeosciences Discussions 11, no. 11 (2014): 15663–91. http://dx.doi.org/10.5194/bgd-11-15663-2014.

Full text

Abstract:

Abstract. The permanently stratified Lake Kivu is one of the largest freshwater reservoirs of dissolved methane (CH4) on Earth. Yet CH4 emissions from its surface to the atmosphere has been estimated to be 2 orders of magnitude lower than the CH4 upward flux to the mixed layer, showing that microbial CH4 oxidation is an important process within the water column. A combination of natural abundance carbon stable isotope analysis (δ13C) of several inorganic and organic carbon pools and 13CH4-labelling experiments was carried out during rainy and dry season to quantify (i) the contribution of CH4-

APA, Harvard, Vancouver, ISO, and other styles

30

Dote, Yutaka. "Kinetics of CH4 oxidation in mixed culture." Waste Management & Research 20, no. 6 (2002): 494–500. http://dx.doi.org/10.1177/0734242x0202000603.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Wu, Yo-ping G., and Ya-Fen Lin. "High temperature oxidation of C2Cl4/CH4 mixtures." Journal of Hazardous Materials 91, no. 1-3 (2002): 239–56. http://dx.doi.org/10.1016/s0304-3894(01)00393-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Giannikos, A., A. D. Frantzis, C. Pliangos, S. Bebelis, and C. G. Vayenas. "Electrochemical promotion of CH4 oxidation on Pd." Ionics 4, no. 1-2 (1998): 53–60. http://dx.doi.org/10.1007/bf02375780.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Du, Jin, Wei Chen, Gangfeng Wu, et al. "Evoked Methane Photocatalytic Conversion to C2 Oxygenates over Ceria with Oxygen Vacancy." Catalysts 10, no. 2 (2020): 196. http://dx.doi.org/10.3390/catal10020196.

Full text

Abstract:

Direct conversion of methane to its oxygenate derivatives remains highly attractive while challenging owing to the intrinsic chemical inertness of CH4. Photocatalysis arises as a promising green strategy which could stimulate water splitting to produce oxidative radicals for methane C–H activation and subsequent C–C coupling. However, synthesis of a photocatalyst with an appropriate capability of methane oxidation by water remains a challenge using an effective and viable approach. Herein, ceria nanoparticles with abundant oxygen vacancies prepared by calcinating commercial CeO2 powder at high

APA, Harvard, Vancouver, ISO, and other styles

34

He, Haijie, Tao Wu, Zhanhong Qiu, et al. "Enhanced Methane Oxidation Potential of Landfill Cover Soil Modified with Aged Refuse." Atmosphere 13, no. 5 (2022): 802. http://dx.doi.org/10.3390/atmos13050802.

Full text

Abstract:

Aged refuse with a landfill age of 1.5 years was collected from a municipal solid waste landfill with high kitchen waste content and mixed with soil as biocover material for landfill. A series of laboratory batch tests was performed to determine the methane oxidation potential and optimal mixing ratio of landfill cover soil modified with aged refuse, and the effects of water content, temperature, CO2/CH4, and O2/CH4 ratios on its methane oxidation capacity were analyzed. The microbial community analysis of aged refuse showed that the proportions of type I and type II methane-oxidizing bacteria

APA, Harvard, Vancouver, ISO, and other styles

35

Ngo, Phuong Linh. "THE METHANE UPTAKE CAPACITY OF SOIL GARDEN." Vietnam Journal of Science and Technology 55, no. 4C (2018): 122. http://dx.doi.org/10.15625/2525-2518/55/4c/12140.

Full text

Abstract:

Aerobic CH4 oxidation through methanotrophic bacteria is the only terrestrial sink and the only sink that can be altered directly or indirectly by human so far. However, the capacity of this sink is highly variable in different ecosystems depending on four key factors which are soil diffusivity, soil temperature, soil nitrogen status and soil moisture. While many studies in Australia experience the significant inverse correlation between soil moisture and CH4 flux magnitude in temperate forests in Victoria and New South Wales, there is a lack of research about the methane uptake capacity of ga

APA, Harvard, Vancouver, ISO, and other styles

36

Friberg, Ida, Aiyong Wang, and Louise Olsson. "Hydrothermal Aging of Pd/LTA Monolithic Catalyst for Complete CH4 Oxidation." Catalysts 10, no. 5 (2020): 517. http://dx.doi.org/10.3390/catal10050517.

Full text

Abstract:

Palladium-based catalysts are known to provide high CH4 oxidation activity. One drawback for these materials is that they often lose activity in the presence of water vapor due to the formation of surface hydroxyls. It is however possible to improve the water vapor tolerance by using zeolites as support material. In this study, we have investigated Pd supported on thermally stable LTA zeolite with high framework Si/Al ratio (Si/Al = ~44) for CH4 oxidation and the effect of hydrothermal aging at temperatures up to 900 °C. High and stable CH4 oxidation activity in the presence of water vapor was

APA, Harvard, Vancouver, ISO, and other styles

37

Smemo, K. A., and J. B. Yavitt. "Anaerobic oxidation of methane: an underappreciated aspect of methane cycling in peatland ecosystems?" Biogeosciences Discussions 7, no. 5 (2010): 7945–83. http://dx.doi.org/10.5194/bgd-7-7945-2010.

Full text

Abstract:

Abstract. Despite a large body of literature on microbial anaerobic oxidation of methane (AOM) in marine sediments and saline waters and its importance to the global methane (CH4) cycle, until recently little work has addressed the potential occurrence and importance of AOM in non-marine systems. This is particularly true for peatlands, which represent both a massive sink for atmospheric CO2 and a significant source of atmospheric CH4. Our knowledge of this process in peatlands is inherently limited by the methods used to study CH4 dynamics in soil and sediment and the assumption that there ar

APA, Harvard, Vancouver, ISO, and other styles

38

Smemo, K. A., and J. B. Yavitt. "Anaerobic oxidation of methane: an underappreciated aspect of methane cycling in peatland ecosystems?" Biogeosciences 8, no. 3 (2011): 779–93. http://dx.doi.org/10.5194/bg-8-779-2011.

Full text

Abstract:

Abstract. Despite a large body of literature on microbial anaerobic oxidation of methane (AOM) in marine sediments and saline waters and its importance to the global methane (CH4) cycle, until recently little work has addressed the potential occurrence and importance of AOM in non-marine systems. This is particularly true for peatlands, which represent both a massive sink for atmospheric CO2 and a significant source of atmospheric CH4. Our knowledge of this process in peatlands is inherently limited by the methods used to study CH4 dynamics in soil and sediment and the assumption that there ar

APA, Harvard, Vancouver, ISO, and other styles

39

Korkiakoski, Mika, Tiia Määttä, Krista Peltoniemi, Timo Penttilä, and Annalea Lohila. "Excess soil moisture and fresh carbon input are prerequisites for methane production in podzolic soil." Biogeosciences 19, no. 7 (2022): 2025–41. http://dx.doi.org/10.5194/bg-19-2025-2022.

Full text

Abstract:

Abstract. Boreal upland forests are generally considered methane (CH4) sinks due to the predominance of CH4 oxidizing bacteria over the methanogenic archaea. However, boreal upland forests can temporarily act as CH4 sources during wet seasons or years. From a landscape perspective and in annual terms, this source can be significant as weather conditions may cause flooding, which can last a considerable proportion of the active season and because often, the forest coverage within a typical boreal catchment is much higher than that of wetlands. Processes and conditions which change mineral soils

APA, Harvard, Vancouver, ISO, and other styles

40

Zhan, Liang-tong, Tao Wu, Song Feng, Ji-wu Lan, and Yun-min Chen. "A simple and rapid in situ method for measuring landfill gas emissions and methane oxidation rates in landfill covers." Waste Management & Research 38, no. 5 (2019): 588–93. http://dx.doi.org/10.1177/0734242x19893007.

Full text

Abstract:

A newly developed static chamber method with a laser methane detector and a biogas analyser was proposed to measure the landfill gas emissions and methane (CH4) oxidation rates in landfill covers. The method relied on a laser methane detector for measuring CH4 concentration, avoiding gas samplings during test and hence the potential interference of gas compositions inside the chamber. All the measurements could be obtained on site. The method was applied to determine the landfill gas emissions and CH4 oxidation rates in a full-scale loess gravel capillary barrier cover constructed in landfill.

APA, Harvard, Vancouver, ISO, and other styles

41

Bykova, Svetlana, Pascal Boeckx, Irina Kravchenko, Valery Galchenko, and Oswald Van Cleemput. "Response of CH4 oxidation and methanotrophic diversity to NH4 + and CH4 mixing ratios." Biology and Fertility of Soils 43, no. 3 (2006): 341–48. http://dx.doi.org/10.1007/s00374-006-0114-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Chawla, Jaspreet, Sven Schardt, Sofia Angeli, et al. "Oxidative Coupling of Methane over Pt/Al2O3 at High Temperature: Multiscale Modeling of the Catalytic Monolith." Catalysts 12, no. 2 (2022): 189. http://dx.doi.org/10.3390/catal12020189.

Full text

Abstract:

At high temperatures, the oxidative coupling of methane (OCM) is an attractive approach for catalytic conversion of methane into value-added chemicals. Experiments with a Pt/Al2O3-coated catalytic honeycomb monolith were conducted with varying CH4/O2 ratios, N2 dilution at atmospheric pressure, and very short contact times. The reactor was modeled by a multiscale approach using a parabolic two-dimensional flow field description in the monolithic channels coupled with a heat balance of the monolithic structure, and multistep surface reaction mechanisms as well as elementary-step, gas phase reac

APA, Harvard, Vancouver, ISO, and other styles

43

Weimer, W. A., F. M. Cerio, and C. E. Johnson. "Examination of the chemistry involved in microwave plasma assisted chemical vapor deposition of diamond." Journal of Materials Research 6, no. 10 (1991): 2134–44. http://dx.doi.org/10.1557/jmr.1991.2134.

Full text

Abstract:

Chemical reaction products formed in a microwave plasma assisted chemical vapor deposition apparatus for diamond film deposition are detected using mass spectrometry. Carbon source gases CH4, C2H6, C2H4, or C2H2 produce CH4, C2H2, CO, and H2O as major stable reaction products when introduced into a H2/O2 plasma under diamond deposition conditions. The effect of oxygen addition is similar for all carbon source gases with respect to reaction product formation, indicating that a common reaction mechanism is active in all cases. On a qualitative basis, these observations are consistent with a mech

APA, Harvard, Vancouver, ISO, and other styles

44

Stylianidis, Nearchos, Ulugbek Azimov, and Martin Birkett. "Investigation of the Effect of Hydrogen and Methane on Combustion of Multicomponent Syngas Mixtures using a Constructed Reduced Chemical Kinetics Mechanism." Energies 12, no. 12 (2019): 2442. http://dx.doi.org/10.3390/en12122442.

Full text

Abstract:

This study investigated the effects of H2 and CH4 concentrations on the ignition delay time and laminar flame speed during the combustion of CH4/H2 and multicomponent syngas mixtures using a novel constructed reduced syngas chemical kinetics mechanism. The results were compared with experiments and GRI Mech 3.0 mechanism. It was found that mixture reactivity decreases and increases when higher concentrations of CH4 and H2 were used, respectively. With higher H2 concentration in the mixture, the formation of OH is faster, leading to higher laminar flame speed and shorter ignition delay time. CH

APA, Harvard, Vancouver, ISO, and other styles

45

Zhou, Mingyang, Zhijun Liu, Xiaomin Yan, Kai Tan, Fengyuan Tian, and Jiang Liu. "Simultaneous Electrochemical Reduction of Carbon Dioxide and Partial Oxidation of Methane in a Solid Oxide Cell with Silver-Based Cathode and Nickel-Based Anode." Journal of The Electrochemical Society 169, no. 3 (2022): 034502. http://dx.doi.org/10.1149/1945-7111/ac554d.

Full text

Abstract:

Simultaneous electrochemical reduction of CO2 and partial oxidation of CH4 in a solid oxide cell (CO2/CH4 redox SOC) with Ag-based cathode and Ni-based anode is compared with CO2 reduction in a solid oxide electrolysis cell (CO2-SOEC) and CH4 oxidation in a solid oxide fuel cell (CH4-SOFC). Overpotential losses from different sources and gases products from each electrode are analyzed. Results show that the process of a CO2/CH4 redox SOC is exactly a combination of the cathode process of a CO2-SOEC and the anode process of a CH4-SOFC. With the same CO and syngas obtained, a CO2/CH4 redox SOC c

APA, Harvard, Vancouver, ISO, and other styles

46

Iverach, Charlotte P., Sabrina Beckmann, Dioni I. Cendón, Mike Manefield, and Bryce F. J. Kelly. "Biogeochemical constraints on the origin of methane in an alluvial aquifer: evidence for the upward migration of methane from underlying coal measures." Biogeosciences 14, no. 1 (2017): 215–28. http://dx.doi.org/10.5194/bg-14-215-2017.

Full text

Abstract:

Abstract. Geochemical and microbiological indicators of methane (CH4) production, oxidation and migration processes in groundwater are important to understand when attributing sources of gas. The processes controlling the natural occurrence of CH4 in groundwater must be understood, especially when considering the potential impacts of the global expansion of coal seam gas (CSG) production on groundwater quality and quantity. We use geochemical and microbiological data, along with measurements of CH4 isotopic composition (δ13C-CH4), to determine the processes acting upon CH4 in a freshwater allu

APA, Harvard, Vancouver, ISO, and other styles

47

Rainer, Edda M., Christophe V. W. Seppey, Caroline Hammer, Mette M. Svenning, and Alexander T. Tveit. "The Influence of Above-Ground Herbivory on the Response of Arctic Soil Methanotrophs to Increasing CH4 Concentrations and Temperatures." Microorganisms 9, no. 10 (2021): 2080. http://dx.doi.org/10.3390/microorganisms9102080.

Full text

Abstract:

Rising temperatures in the Arctic affect soil microorganisms, herbivores, and peatland vegetation, thus directly and indirectly influencing microbial CH4 production. It is not currently known how methanotrophs in Arctic peat respond to combined changes in temperature, CH4 concentration, and vegetation. We studied methanotroph responses to temperature and CH4 concentration in peat exposed to herbivory and protected by exclosures. The methanotroph activity was assessed by CH4 oxidation rate measurements using peat soil microcosms and a pure culture of Methylobacter tundripaludum SV96, qPCR, and

APA, Harvard, Vancouver, ISO, and other styles

48

Frasi, Niccolò, Elena Rossi, Isabella Pecorini, and Renato Iannelli. "Methane Oxidation Efficiency in Biofiltration Systems with Different Moisture Content Treating Diluted Landfill Gas." Energies 13, no. 11 (2020): 2872. http://dx.doi.org/10.3390/en13112872.

Full text

Abstract:

This study investigates the influence of moisture content on the potential oxidation efficiency of methane (CH4) of biofiltration systems treating landfill gas containing high oxygen concentrations. Column tests filled with compost with different moisture contents (20%, 30%, and 40%) loaded with different methane flows were set up on a laboratory scale. Analyzing the results the following evidences can be summarized: With low methane load (<100 g CH4 m−2 d−1), a moisture content of 20% was not enough to support bacterial activity, while a moisture content of 40% advantaged the compost respi

APA, Harvard, Vancouver, ISO, and other styles

49

Bezdek, Máté J., Shao-Xiong Lennon Luo, Kang Hee Ku, and Timothy M. Swager. "A chemiresistive methane sensor." Proceedings of the National Academy of Sciences 118, no. 2 (2020): e2022515118. http://dx.doi.org/10.1073/pnas.2022515118.

Full text

Abstract:

A chemiresistive sensor is described for the detection of methane (CH4), a potent greenhouse gas that also poses an explosion hazard in air. The chemiresistor allows for the low-power, low-cost, and distributed sensing of CH4 at room temperature in air with environmental implications for gas leak detection in homes, production facilities, and pipelines. Specifically, the chemiresistors are based on single-walled carbon nanotubes (SWCNTs) noncovalently functionalized with poly(4-vinylpyridine) (P4VP) that enables the incorporation of a platinum-polyoxometalate (Pt-POM) CH4 oxidation precatalyst

APA, Harvard, Vancouver, ISO, and other styles

50

Chiri, Eleonora, Chris Greening, Rachael Lappan, et al. "Termite mounds contain soil-derived methanotroph communities kinetically adapted to elevated methane concentrations." ISME Journal 14, no. 11 (2020): 2715–31. http://dx.doi.org/10.1038/s41396-020-0722-3.

Full text

Abstract:

Abstract Termite mounds have recently been confirmed to mitigate approximately half of termite methane (CH4) emissions, but the aerobic CH4 oxidising bacteria (methanotrophs) responsible for this consumption have not been resolved. Here, we describe the abundance, composition and CH4 oxidation kinetics of the methanotroph communities in the mounds of three distinct termite species sampled from Northern Australia. Results from three independent methods employed show that methanotrophs are rare members of microbial communities in termite mounds, with a comparable abundance but distinct compositi

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!