Results 251 to 260 of about 13,002 (297)

Combined CO2 Capture & Methanation

2021
Current multistage CCU technologies using renewable electricity to yield fuels suffer from low energy efficiency and require large capital expenditures. To increase the efficiency of the whole process and reduce its cost, a possible innovative solution is represented by the combined capture and hydrogenation of CO2.
S. Cimino, L. Lisi, A. Coppola, M. Urciuolo, R. Chirone, F. Scala   +5 more
openaire   +1 more source

CO2 Methanation: Principles and Challenges

2019
The power to gas (P2G) process has the potential to solve long-term and large-scale energy storage problems as well as reduce CO2 emissions. P2G involves CO2 methanation as a pillar of the process for the production of synthetic natural gas. Therefore, this chapter focuses on the principles and fundamental challenges of the CO2 methanation.
Mebrahtu C., Krebs F., Abate S., Perathoner S., Centi G., Palkovits R.   +5 more
openaire   +2 more sources

Bimetallic Zeolite Catalyst for CO2 Reforming of Methane

Topics in Catalysis, 2009
The catalytic activity of Ni–Rh on the synthesized BEA zeolite in carbon dioxide reforming of methane has been investigated. Catalysts were prepared using the incipient wetness impregnation method, with a total content of metals up to 5 wt%. Catalysts were characterized through XRD, TPR, N2 adsorption, SEM, AAS, TG/DSC analyses.
Frontera P., Aloise A., MacArio A., Antonucci P. L., Crea F., Giordano G., Nagy J. B.   +6 more
openaire   +4 more sources

CO2 methanation and co-methanation of CO and CO2 over Mn-promoted Ni/Al2O3 catalysts

Frontiers of Chemical Science and Engineering, 2016
A series of Mn-promoted 15 wt-% Ni/Al2O3 catalysts were prepared by an incipient wetness impregnation method. The effect of the Mn content on the activity of the Ni/Al2O3 catalysts for CO2 methanation and the comethanation of CO and CO2 in a fixed-bed reactor was investigated.
Kechao Zhao, Zhenhua Li, Li Bian
openaire   +1 more source

Methane Stem Fluxes Under Elevated CO2

2021
<p>Tree stems can exchange CH<sub>4</sub> with the atmosphere at rates that can strongly affect GHG budgets at regional scales. However, we do not know those fluxes’ sensitivity to different components of climate change, such as the increase in concentrations of atmospheric CO<sub>2 ...
Josep Barba, Vincent Gauci
openaire   +1 more source

CO2 methanation on Ru-doped ceria

Journal of Catalysis, 2011
We study the methanation of CO2 catalyzed by ceria doped with Ni, Co, Pd, or Ru. Ce0.96Ru0.04O2 and Ce 0.95Ru0.05O2 perform best, converting 55% of CO2 with a 99% selectivity for methane, at a temperature of 450 °C. This is comparable to the best catalysts found previously for this reaction. Ce0.95Ru0.05O2 was characterized by XRD, electron microscopy,
Sharma, Sudhanshu, Hu, Zhenpeng, Zhang, Peng, McFarland, Eric W., Metiu, Horia   +4 more
openaire   +2 more sources

Methane Emissions, Ruminants, and CO2

Microbe Magazine, 2010
Mark Rasmussen's letter (October 2009 Microbe, p. 437) does a creditable job of clarifying the issue of the ruminant contribution to global methane emissions. But in doing so he inadvertently offers up an even larger falsehood than the one he is correcting: that “the carbon dioxide emitted by ruminants contributes as much or more towards global warming
openaire   +1 more source

Entrapping CO2, while recovering methane

American Mineralogist, 2014
The injection of carbon dioxide into methane hydrate-bearing sediments causes the release of methane and the formation of carbon dioxide hydrate. This phenomenon known as CH4-CO2 replacement creates a unique opportunity to recover an energy resource, methane, while entrapping a greenhouse gas, carbon dioxide.
openaire   +1 more source

CO2 Nutzbarmachung via Methan Trockenreformierung

2020
Der Kampf gegen den Klimawandel ist eine der großen Herausforderungen dieser Generation und während fossile Brennstoffe noch immer den Großteil der globalen Energiequellen darstellen, steigen damit verbunden die Konzentrationen von Treibhausgasen in der Atmosphäre [1, 2], während nach wirtschaftlichen erneuerbaren Energiequellen gesucht wird.
openaire   +1 more source

Catalytic methanation of CO2 with NH3

Catalysis Today, 2017
Abstract The catalytic methanation of CO2 with ammonia over Ni, Pt, and Ru catalysts impregnated on γ-alumina was carried out in a fixed-bed reactor under atmospheric pressure at 573–873 K. The methanation of CO2 with NH3 is considered to occur in two stages –NH3 decomposition into H2/N2 followed by CO2 methanation with H2. 1 wt% Pt/γ-Al2O3 exhibited
Md. Azhar Uddin, Yamato Honda, Yoshiei Kato, Katsuhiko Takagi   +3 more
openaire   +1 more source