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1. Numerical and Experimental Research on Gas Production from Methane Hydrate under Water–Excess Conditions

Author:
Wang, Pengfei; Teng, Ying
Source:
Energy & fuels 2021 v.35 no.6 pp. 4848-4857
ISSN:
1520-5029
Subject:
methane; methane production,   etc   ; dissociation; energy; heat; temperature;     Show all 6 Subjects
Abstract:
... A combination of experimental observations and numerical simulations was used to investigate the methane hydrate dissociation properties. To study the impact of water saturation heterogeneity on hydrate production, a multilayer sand-filling method was used to synthesize two types of hydrate-bearing samples designated Class 2 and Class 3. The experimental results indicated that the sensible heat of ...
DOI:
10.1021/acs.energyfuels.0c04106

2. Handling methane: a Ni(i) F₄₃₀-like cofactor derived from VB₁₂ is active in methyl-coenzyme M reductase

Author:
Wu, Jue; Chen, Shi-Lu
Source:
Chemical communications 2021 v.57 no.4 pp. 476-479
ISSN:
1364-548X
Subject:
methane; methane production,   etc   ; catalytic activity; oxidoreductases;     Show all 4 Subjects
Abstract:
... Replacing coenzyme F₄₃₀, an Ni(i) F₄₃₀-like cofactor derived from vitamin B₁₂ (F₄₃₀₋B₁₂) is revealed by DFT calculations to be able to catalyze methane formation in methyl-coenzyme M reductase with a barrier of 13.3 kcal mol⁻¹, demonstrating the correctness of the route starting from vitamin B₁₂. The structure–activity relationships of F₄₃₀ and F₄₃₀₋B₁₂ (especially the roles of the F ring) are dis ...
DOI:
10.1039/d0cc06591a

3. Heavy metal reduction coupled to methane oxidation：Mechanisms, recent advances and future perspectives

Author:
Dang, Cheng-Cheng; Xie, Guo-Jun; Liu, Bing-Feng; Xing, De-Feng; Ding, Jie; Ren, Nan-Qi
Source:
Journal of hazardous materials 2021 v.405 pp. 124076
ISSN:
0304-3894
Subject:
methane; methane production,   etc   ; environmental fate; heavy metals; oxidation; pollution; toxicity;     Show all 7 Subjects
Abstract:
... Methane emission has contributed greatly to the global warming and climate change, and the pollution of heavy metals is an important concern due to their toxicity and environmental persistence. Recently, multiple heavy metals have been demonstrated to be electron acceptors for methane oxidation, which offers a potential for simultaneous methane emission mitigation and heavy metal detoxification. T ...
DOI:
10.1016/j.jhazmat.2020.124076

4. Coal Fines Migration, Deposition, and Output Simulation during Drainage Stage in Coalbed Methane Production

Author:
Han, Wenlong; Wang, Yanbin; Li, Yong; Ni, Xiaoming; Wu, Xiang; Yang, Jianghao; Zhao, Shihu
Source:
Energy & fuels 2021 v.35 no.6 pp. 4901-4913
ISSN:
1520-5029
Subject:
coalbed methane; methane production,   etc   ; coal; drainage; energy; permeability;     Show all 6 Subjects
Abstract:
... Fracture and cleats development controls the permeability of coal reservoirs, while the migration of coal fines can block fractures and affect coalbed methane (CBM) production performance. To reveal the migration, agglomeration, and settlement of coal fines within fractures, and also to investigate permeability variations, an experimental simulation was conducted. Factors like coal fine particle s ...
DOI:
10.1021/acs.energyfuels.0c04418

5. Ni@ZrO2 yolk-shell catalyst for CO2 methane reforming: Effect of Ni@SiO2 size as the hard-template

Author:
Lim, Zi-Yian; Tu, Junling; Xu, Yongjun; Chen, Baiman
Source:
Journal of colloid and interface science 2021 v.590 pp. 641-651
ISSN:
0021-9797
Subject:
methane,   etc   ; carbon dioxide; catalysts; texture;     Show all 4 Subjects
Abstract:
... This paper reports the usage ratio of TEOS and Zr(OBu)₄ on the formation of Ni@ZrO₂ yolk-shell for dry reforming of methane. From XPS analysis, the ZrO₂ hollow shell texture is demonstrated to be [TEOS]/[Zr(OBu)₄] dependent due to different sizes of SiO₂ produced. It found that an adequate ratio of [TEOS]/[Zr(OBu)₄] improves the catalytic conversion of dry reforming of methane. It (Ni@ZrO₂-SiZr-7. ...
DOI:
10.1016/j.jcis.2021.01.100

6. A potential catalyst for continuous methane partial oxidation to methanol using N₂O: Cu-SSZ-39

Author:
Memioglu, Ozgun; Ipek, Bahar
Source:
Chemical communications 2021 v.57 no.11 pp. 1364-1367
ISSN:
1364-548X
Subject:
methane,   etc   ; catalysts; methanol; oxidants; oxidation;     Show all 5 Subjects
Abstract:
... Continuous catalytic methanol production from methane is reported on Cu-SSZ-39 using N₂O as an oxidant. Through optimization of CH₄, N₂O and H₂O partial pressures, a methanol formation rate of 499 μmolCH₃OH g⁻¹ h⁻¹ and a methanol selectivity of 34% is achieved. ...
DOI:
10.1039/d0cc06534j

7. Application of the laser methane detector for measurements in freely grazing goats: impact on animals' behaviour and methane emissions

Author:
Roessler, R.; Schlecht, E.
Source:
Animal 2021 v.15 no.1 pp. 100070
ISSN:
1751-7311
Subject:
methane,   etc   ; air; females; forests; rumination;     Show all 5 Subjects
Abstract:
... The laser methane detector (LMD) has been increasingly used in the last decade to assess the methane (CH₄) concentration in the exhaled air of ruminants. The CH₄ concentration was mostly measured indoors, where animals were either retained in a feed fence or manually by a person to facilitate the LMD measurements. By contrast, the use of the LMD for measurements under outdoor conditions has been l ...
DOI:
10.1016/j.animal.2020.100070

8. Biochemistry of aerobic biological methane oxidation

Author:
Koo, Christopher W.; Rosenzweig, Amy C.
Source:
Chemical Society reviews 2021 v.50 no.5 pp. 3424-3436
ISSN:
1460-4744
Subject:
methane; methane monooxygenase (particulate); methane monooxygenase (soluble),   etc   ; active sites; biochemical pathways; methanol; methanotrophs; oxidation;     Show all 8 Subjects
Abstract:
... Methanotrophic bacteria represent a potential route to methane utilization and mitigation of methane emissions. In the first step of their metabolic pathway, aerobic methanotrophs use methane monooxygenases (MMOs) to activate methane, oxidizing it to methanol. There are two types of MMOs: a particulate, membrane-bound enzyme (pMMO) and a soluble, cytoplasmic enzyme (sMMO). The two MMOs are complet ...
DOI:
10.1039/d0cs01291b

9. Direct interspecies electron transfer mechanism in enhanced methanogenesis: A mini-review

Author:
Wang, Wei; Lee, Duu-Jong
Source:
Bioresource technology 2021 v.330 pp. 124980
ISSN:
0960-8524
Subject:
methane production,   etc   ; anaerobic digestion; carbon; electron transfer;     Show all 4 Subjects
Abstract:
... The role of direct interspecies electron transfer (DIET) on enhancement of methanogenesis has been studied. This mini-review updated the current researches on the potential role of DIET on enhanced performance for anaerobic digestion of organic substrates with effective strategies implemented. Since most experimental observations correlated with the DIET mechanism are yet to be consolidated, this ...
DOI:
10.1016/j.biortech.2021.124980

10. Dioxygen splitting at room temperature over distant binuclear transition metal centers in zeolites for direct oxidation of methane to methanol

Author:
Mlekodaj, Kinga; Lemishka, Mariia; Sklenak, Stepan; Dedecek, Jiri; Tabor, Edyta
Source:
Chemical communications 2021 v.57 no.28 pp. 3472-3475
ISSN:
1364-548X
Subject:
methane,   etc   ; ambient temperature; methanol; oxidation; oxygen; zeolites;     Show all 6 Subjects
Abstract:
... Here we demonstrate for the first time the splitting of dioxygen at RT over distant binuclear transition metal (M = Ni, Mn, and Co) centers stabilized in ferrierite zeolite. Cleaved dioxygen directly oxidized methane to methanol, which can be released without the aid of an effluent to the gas phase at RT. ...
DOI:
10.1039/d1cc00909e

11. Retraction: Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

Author:
Chen, Junjie; Gao, Xuhui; Yan, Longfei; Xu, Deguang
Source:
RSC advances 2021 v.11 no.21 pp. 12531
ISSN:
2046-2069
Subject:
methane,   etc   ; fluid mechanics; hydrogen production; steam;     Show all 4 Subjects
Abstract:
... Retraction of ‘Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production’ by Junjie Chen et al., RSC Adv., 2018, 8, 25183–25200, DOI: 10.1039/C8RA04440F. ...
DOI:
10.1039/d1ra90094c

12. Effect of Propane Addition and Oxygen Enrichment on the Flame Characteristics of Biogas

Author:
Wang, Xi; Zheng, Ligang; Wang, Jian; Pan, Rongkun; Yang, Wen; Jin, Hongwang; Fu, Yuanpeng
Source:
Energy & fuels 2021 v.35 no.6 pp. 5015-5025
ISSN:
1520-5029
Subject:
methane,   etc   ; biogas; combustion; energy; oxidants; oxygen; propane;     Show all 7 Subjects
Abstract:
... Mixing biogas with other fuels or increasing the oxygen fraction in the oxidizer can improve the combustion performance of biogas. In this study, we investigated the effects of propane addition and oxygen enrichment on the flame characteristics of biogas with a constant heating value in a half-open duct. The evolution of the flame structure revealed that the tulip structure took on two types of pa ...
DOI:
10.1021/acs.energyfuels.1c00113

13. Investigation on Methane Hydrate Formation in Water-based Drilling Fluid

Author:
He, Yong; Long, Zhen; Lu, Jingsheng; Shi, Lingli; Yan, Wen; Liang, Deqing
Source:
Energy & fuels 2021 v.35 no.6 pp. 5264-5270
ISSN:
1520-5029
Subject:
methane,   etc   ; energy; gas hydrate; temperature; viscosity;     Show all 5 Subjects
Abstract:
... To guarantee the flow assurance of drilling fluid in deep-water drilling, the inhibitory effect of PVP-K90 on methane hydrate formation was measured at 275.15 and 277.15 K with an initial pressure of 6, 8, and 10 MPa. The effect of PVP-K90 on the rheological properties of drilling fluid was also measured. Results showed that the apparent viscosity enhanced from 27 and 114 mPa·s as the concentratio ...
DOI:
10.1021/acs.energyfuels.0c04409

14. Experimental Study on Fluid Production from Methane Hydrate Sediments under the Marine Triaxial Condition

Author:
Gao, Qiang; Zhao, Jianzhong; Yin, Zhenyuan; Yang, Dong; Zhang, Chi
Source:
Energy & fuels 2021 v.35 no.5 pp. 3915-3924
ISSN:
1520-5029
Subject:
methane,   etc   ; dissociation; energy efficiency; evolution; marine environment;     Show all 5 Subjects
Abstract:
... Methane hydrate (MH) is potential new energy attracting attention from the scientific and industrial communities. In situ depressurization is considered a high energy efficient method. However, the study of the evolution of fluid production and overburden pressure under an in situ environment was significant to exploit CH₄ from methane-hydrate-bearing sediments (MHBS) safely and efficiently. Herei ...
DOI:
10.1021/acs.energyfuels.0c04030

15. Free and Microencapsulated Essential Oils Incubated In Vitro: Ruminal Stability and Fermentation Parameters

Author:
Amin, Nida; Tagliapietra, Franco; Arango, Sheyla; Guzzo, Nadia; Bailoni, Lucia
Source:
Animals 2021 v.11 no.1
ISSN:
2076-2615
Subject:
methane,   etc   ; Protozoa; animals; fermentation; microencapsulation; pH; vegetables;     Show all 7 Subjects
Abstract:
... Essential oils (EOs) are generally considered as an alternative to antibiotics because of their antimicrobial properties. Despite their vast variety, their volatile nature poses hindrance on their use in animal feeds, which demands a high degree of stability. This study aimed at testing the susceptibility of three EOs (mixtures of EOs based on cinnamaldehyde, named Olistat-Cyn, Olistat-G, and Olis ...
DOI:
10.3390/ani11010180

16. Modeling Kinetic, Thermodynamic, and Operational Effects in a Steam Methane Reformer. Part A: Reformer Output

Author:
Severinsen, Isaac; Herritsch, Alfred; Watson, Matthew
Source:
Industrial & engineering chemistry process design and development 2021 v.60 no.5 pp. 2041-2049
ISSN:
1520-5045
Subject:
methane,   etc   ; Python; models; process design; steam;     Show all 5 Subjects
Abstract:
... Key decisions in developing a model of a steam methane reformer were investigated in this paper. A comprehensive one-dimensional Python model of a reformer tube is proposed, including the effects of sintering and poisoning. Comparison between the Redlich–Kwong and ideal gas equations of state shows little difference upon reformed gas outlet properties. Different reaction kinetic models are tested ...
DOI:
10.1021/acs.iecr.0c04909

17. High-rate blackwater anaerobic digestion under septic tank conditions with the amendment of biosolids-derived biochar synthesized at different temperatures

Author:
Shekhar Bose, Raj; Zakaria, Basem S.; Kumar Tiwari, Manoj; Ranjan Dhar, Bipro
Source:
Bioresource technology 2021 v.331 pp. 125052
ISSN:
0960-8524
Subject:
methane; methane production,   etc   ; anaerobic digesters; anaerobic digestion; biochar; methanogens; microbiome; pH; septic systems;     Show all 9 Subjects
Abstract:
... Septic tanks have been widely used for blackwater treatment in developing countries, while high-rate septic tanks with improved methane recovery are yet to be achieved. This study investigated biosolids-derived biochar (synthesized at 300℃, 425℃, and 550℃) as an additive for developing high-rate septic tanks. The experiments were conducted with anaerobic bioreactors operated with synthetic blackwa ...
DOI:
10.1016/j.biortech.2021.125052

18. Influences of size reduction, hydration, and thermal-assisted hydration pretreatment to increase the biogas production from Napier grass and Napier silage

Author:
Jomnonkhaow, Umarin; Sittijunda, Sureewan; Reungsang, Alissara
Source:
Bioresource technology 2021 v.331 pp. 125034
ISSN:
0960-8524
Subject:
methane; methane production,   etc   ; Cenchrus purpureus; biodegradability; biomass; digestibility; gas production (biological); lignocellulose; particle size; silage; technology;     Show all 11 Subjects
Abstract:
... Pretreatment of lignocellulose materials prior to biogas production is required to minimize biomass recalcitrance and increase biomass digestibility. In this study, the effects of particle size reduction, hydration, and thermal-assisted hydration on Napier grass and silage for methane production were evaluated. Compared to the 4.75-mm particle size Napier grass and silage, 0.425-mm Napier grass an ...
DOI:
10.1016/j.biortech.2021.125034

19. Co-digestion of primary sewage sludge with drinking water treatment sludge: A comprehensive evaluation of benefits

Author:
Xie, Sihuang; Li, Xuan; Pham, Chau Uyen; Nguyen, Hoang Viet; Song, Yarong; Chetty, Kirthi; Kulandaivelu, Jagadeeshkumar; Wang, Chengduan; Hai, Faisal; Jiang, Guangming
Source:
Bioresource technology 2021 v.330 pp. 124994
ISSN:
0960-8524
Subject:
methane; methane production,   etc   ; anaerobic digestion; hydrogen sulfide; hydrolysis; methanogens; microbial communities; phosphates; sewage sludge;     Show all 9 Subjects
Abstract:
... Anaerobic co-digestion of primary sludge with two types of drinking water treatment sludge (DWTS), namely iron- or aluminum-rich DWTS (Fe- or Al-DWTS) were systematically evaluated by biochemical methane potential tests, kinetic modelling, downstream process parameters and microbial community analysis. Specific methane yields decreased approximately 19% to 123 mL·g⁻¹ VS, while the hydrolysis const ...
DOI:
10.1016/j.biortech.2021.124994

20. Thermophilic anaerobic digestion of winery effluents in a two-stage process and the effect of the feeding frequency on methane production

Author:
Vital-Jacome, Miguel A.; Buitrón, Germán
Source:
Chemosphere 2021 v.272 pp. 129865
ISSN:
0045-6535
Subject:
methane; methane production,   etc   ; acetic acid; anaerobic digestion; inoculum; methanogens; organic matter; temperature;     Show all 8 Subjects
Abstract:
... This investigation evaluates a two-stage process to treat highly concentrated winery effluents, including a thermophilic methanogenic stage. The inoculum adaptation, the effect of the organic loading rates on both stages, and the methanogenic reactor’s feeding frequency on the process performance were studied. An active thermophilic inoculum was obtained by a one-step temperature increase from 35 ...
DOI:
10.1016/j.chemosphere.2021.129865