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analysis analysis analysis analysis analysis assessment availability available consistent data derived major method methods occurring period process process process process process process process process process process process processes processes processes research researches similar similarly specifically theoretical variations varied


 Recently, some thermodynamic analysis on the methanation process has been done.  >>
Some thermodynamic analysis has been done.
いくつかの熱力学的研究は完了した。

 Thermodynamics is useful in the assessment of processes occurring in the methanation system and predicting the optimal reaction condition [10], [11], [12] and [13]. >>
Thermodynamics is useful in the assessment of process occuring in the methanation system.
熱力学は偶然発生するメタン発酵の過程を評価するうえで役に立つ。


 Among them, Ni-based catalysts have been widely investigated for industrial purposes due to their low cost and ease of availability. >>
Ni-baced catalysts have been widely investigated for industrial purposes due to their low cost and ease of availability.
ニッケル触媒は工業的な目的物を安価に、かつ簡単に手に入れるために広く研究なされた。


 The thermodynamic analysis of CO2 hydrogenation was performed using the Gibbs reactor model available from the HSC (enthalpy, entropy and heat capacity) Chemistry. >>
The thermodynamic analysis of CO2 hydrogenation was performed using Gibbs reactor model available from the HSC chemistry.
二酸化炭素の水素付加に関する熱力学的研究は化学平衡から求められるギブスの反応モデルを用いて成された。

All these trends and calculations with the reaction condition variations consistent well with the results reported by Swapnesh et al.


  From these data, we can draw a conclusion that, as the reaction temperature increases to a degree higher than 600 °C, CO derived from the reverse water gas shift reaction (Eq. 3) dominates the product in the CO2 hydrogenation process, while CH4 is disfavored.>>
From these data, we can draw a conclusion that.
これらのデータを基に、私たちはそれの結果を描くことができる。
CO derived from the reverse water gas shift reaction.
一酸化炭素は水性ガス反応の逆反応から生成される。


 Only the major components are taken into consideration in the present study and the species presented in a trace amount might be neglected. >>
Only　the major components are taken into consideration in the present study.
 



 Gao and co-workers [16] have systematically conducted a thermodynamic analysis of COx methanation by applying the total Gibbs free energy minimization method. 


This strategy aims at using power to convert water into hydrogen via electrolysis [1], and storing the obtained fuel until the implementation in a high power consumption period that would reconvert it into electricity [2].


In parallel, this reaction is considered to be a critical step in reclaiming oxygen within a closed cycle. Over the years, extensive fundamental research works on CO2 methanation have been investigated and reported in the literatures.


In similar situations, the highest temperature of the reaction systems with varied H2/CO2 ratios of 3.5, 3.0, 2.0 and 1.0 are calculated to be 570 °C, 550 °C, 470 °C, and 300 °C, respectively.


Similarly, for the case of reaction condition with the H2/CO2 ratio of 3, the optimized operation temperature should be not higher than 270 °C.


More specifically, in the case of a H2/CO2 stoichiometry ratio of 4, when the reaction temperature is fixed at 595 °C, the adiabatic temperature rise of the reaction system is 0 °C. This implies that the highest temperature of the reaction system can reach up to 595 °C without providing external heating.


If this reaction was conducted under adiabatic condition, there exists a maximum theoretical temperature when the reaction arrives at its thermodynamic equilibrium.


Increasing the H2/CO2 ratio has a positive effect on the production of CH4. All these trends and calculations with the reaction condition variations consistent well with the results reported by Swapnesh et al.