Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Experimental Study on CO2 Methanation over Ni/Al2O3, Ru/Al2O3, and Ru-Ni/Al2O3 Catalysts
View through CrossRef
CO2 methanation is recognized as one of the best technologies for storing intermittent renewable energy in the form of CH4. In this study, CO2 methanation performance is investigated using Ni/Al2O3, Ru/Al2O3, and Ru-Ni/Al2O3 as the catalysts under conditions of atmospheric pressure, a molar ratio of H2/CO2 = 5, and a space velocity of 5835 h−1. For reaction temperatures ranging from 250 to 550 °C, it was found that the optimum reaction temperature is 400 °C for all catalysts studied. At this temperature, the maximum values of CO2 conversion, H2 efficiency, and CH4 yield and lowest CO yield can be obtained. With temperatures higher than 400 °C, reverse CO2 methanation results in CO2 conversion and CH4 yield decreases with increased temperature, while CO is formed due to reverse water-gas shift reaction. The experimental results showed that CO2 methanation performance at low temperatures can be enhanced greatly using the bimetallic Ru-Ni catalyst compared with the monometallic Ru or Ni catalyst. Under ascending-descending temperature changes between 250 °C and 550 °C, good thermal stability is obtained from Ru-Ni/Al2O3 catalyst. About a 3% decrease in CO2 conversion is found after three continuous cycles (74 h) test.
Title: Experimental Study on CO2 Methanation over Ni/Al2O3, Ru/Al2O3, and Ru-Ni/Al2O3 Catalysts
Description:
CO2 methanation is recognized as one of the best technologies for storing intermittent renewable energy in the form of CH4.
In this study, CO2 methanation performance is investigated using Ni/Al2O3, Ru/Al2O3, and Ru-Ni/Al2O3 as the catalysts under conditions of atmospheric pressure, a molar ratio of H2/CO2 = 5, and a space velocity of 5835 h−1.
For reaction temperatures ranging from 250 to 550 °C, it was found that the optimum reaction temperature is 400 °C for all catalysts studied.
At this temperature, the maximum values of CO2 conversion, H2 efficiency, and CH4 yield and lowest CO yield can be obtained.
With temperatures higher than 400 °C, reverse CO2 methanation results in CO2 conversion and CH4 yield decreases with increased temperature, while CO is formed due to reverse water-gas shift reaction.
The experimental results showed that CO2 methanation performance at low temperatures can be enhanced greatly using the bimetallic Ru-Ni catalyst compared with the monometallic Ru or Ni catalyst.
Under ascending-descending temperature changes between 250 °C and 550 °C, good thermal stability is obtained from Ru-Ni/Al2O3 catalyst.
About a 3% decrease in CO2 conversion is found after three continuous cycles (74 h) test.
Related Results
Methanation of CO2 over nickel and molybdenum bi-metallic catalyst system supported on activated carbon
Methanation of CO2 over nickel and molybdenum bi-metallic catalyst system supported on activated carbon
The escalating environmental impact of CO₂ emissions has driven the demand for innovative
solutions to capture and convert CO₂ into useful energy forms, with CO₂ methanation standi...
Solar fuels via two-step thermochemical redox cycles for power and fuel production
Solar fuels via two-step thermochemical redox cycles for power and fuel production
With the issue of the rise of anthropogenic CO2, global warming and rise of the primary energy demand, strong measures for the energy transition and the diversification with renewa...
Methanation
Methanation
AbstractMethanation, i.e., catalytic hydrogenation of carbon oxides (CO and CO2), especially methanation of CO, has been studied extensively from the beginning of the twentieth cen...
Microkinetic Modeling of CO2 Methanation on Nickel Surfaces
Microkinetic Modeling of CO2 Methanation on Nickel Surfaces
This PhD thesis advances the fundamental understanding of the structure-sensitive reaction mechanism of the Sabatier reaction, also known as the CO2 methanation reaction. By studyi...
Rapid Large-scale Trapping of CO2 via Dissolution in US Natural CO2 Reservoirs
Rapid Large-scale Trapping of CO2 via Dissolution in US Natural CO2 Reservoirs
Naturally occurring CO2 reservoirs across the USA are critical natural analogues of long-term CO2 storage in the subsurface over geological timescales and provide valuable insights...
Design And Operation Of The Levelland Unit CO2 Injection Facility
Design And Operation Of The Levelland Unit CO2 Injection Facility
Abstract
The Levelland CO2 Facility provides CO2 storageand handling capacity for the five CO2 injection pilots located in the Levelland Unit. Facilities pilots l...
An Emerging CO2 Storage Option: CO2 Storage and By-Product Oil Recovery from Shale Oil Formations
An Emerging CO2 Storage Option: CO2 Storage and By-Product Oil Recovery from Shale Oil Formations
Recent studies, sponsored by the United States Energy Association (USEA) and prepared by Advanced Resources International, have identified an emerging CO2 storage option – injectin...
CeO2 Induced Ni-Ce Interaction Enables Efficient CO2 Methanation on Ni/Al2O3/SiC Structured Catalyst
CeO2 Induced Ni-Ce Interaction Enables Efficient CO2 Methanation on Ni/Al2O3/SiC Structured Catalyst
Structured catalysts are one of the most widely used catalysts for carbon dioxide (CO2) methanation, while the interactions between the loaded catalyst and structural supports sign...