Question

observation of reaction between hydrocarbons and steam

Answer 1

Steam reforming involves the reaction between a hydrocarbon or alcohol and This proposition was supported by the observation that the catalyst exhibited ...

Answer 2

Explanation:

Reforming reactions have attracted great attention for a while as they are the easiest way to obtain hydrogen and synthesis gas from light hydrocarbons like methane, methanol, ethanol, etc. The importance of hydrogen as energy vector and synthesis gas as a source of several chemical compounds makes this process very important for the chemical industry. SiC offers some interesting characteristics that render this material suitable for the reforming reactions, such as high thermal conductivity and chemical stability. For that reason, several works have been published in the last few years regarding the use of SiC in different reforming reactions (Fig. 8.2).

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Figure 8.2. Evolution of publications reporting application of SiC in the reforming process until 2017.

In the next section we will comment on the last works reporting the use of SiC in different reforming reactions.

13th International Symposium on Process Systems Engineering (PSE 2018)

Dan Duc Nguyen, ... Wang Lai Yoon, in Computer Aided Chemical Engineering, 2018

3.1 CH4 combustion model

The SMR reaction is a highly endothermic process. The heat required for the reforming reaction is supplied by the combustion gas via a gas burner. The air–methane mixture with an oxygen molar ratio to methane of 2.58 is injected into the combustion chamber and is completely oxidized to generate carbon dioxide, water and a large amount of thermal energy required for the SMR reaction. A simplified global kinetic model for the combustion of methane is adopted to reduce the computational time. A single-step combustion mechanism is given as follows:

(1)CH4+2O2⇒CO2+2H2O

The premixed combustion is resolved by using the eddy-dissipation (ED) model as the turbulence and chemistry interaction in the volumetric reaction.

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