Open AccessBi-reforming of methane: thermodynamic equilibrium analysis and selection of preferable reaction conditions
Author(s) -
Е. В. Матус,
O. B. Sukhova,
И.З. Исмагилов,
М. А. Керженцев,
Lei Li,
З. Р. Исмагилов
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1749/1/012023
Subject(s) - methane , yield (engineering) , chemistry , atmospheric pressure , reagent , catalysis , chemical equilibrium , thermodynamic equilibrium , molar ratio , carbon dioxide , carbon dioxide reforming , thermodynamics , syngas , organic chemistry , physics , oceanography , geology
To determine the optimal reaction conditions of bi-reforming of methane thermodynamic analysis of reaction was performed. The effects of process variables, such as temperature (T = 500–1000°C), pressure (P = 1–30 atm), and feed composition CH 4 /CO 2 /H 2 O on the product distribution were studied. It was shown that to maximize the conversion of reagents and yield of target products the high reaction temperatures (T > 800°C) and atmospheric pressure should be applied. The reaction pathway of the bi-reforming of methane is affected by the feed composition. At 800°C the molar ratio of O/C ≥ 1.1 are preferable to work at region free of carbon formation. The CO 2 conversion and H 2 /CO ratio are controlled by the value of CO2/H2O ratio. Depending on the field of application of synthesis gas, this ratio can be tuned from 1.2 to 2.8 through variation of CO2/H2O ratio from 3 to 0.1. The selected reaction conditions (T = 800°C, P = 1 atm, CH 4 /CO 2 /H 2 O = 1/0.8/0.4) were applied for bi-reforming reaction over Ni catalyst which provided the process parameters close to thermodynamic equilibrium results.