Abstract
To overcome the weak point of the gas type heating (failure in heating uniformly and persistently), liquid type molten salt as a concentration of solar energy was considered as a heat source for dry reforming. This high-temperature molten salt flowing through the center of the tubular reactor supplies necessary heat. The dependence on the number of heat source of the hydrogen production was investigated under the assumption of the fixed volume of the catalyst bed. By changing these numbers, we numerically investigated the methane conversion and hydrogen flow rate to find the best performance. The results showed that the methane conversion performance and hydrogen flow rate improved in proportion to the number of heating tubes. For the one heat source, the reactor surrounded by a heat source rather than that located in the center is the best in terms of hydrogen yield. In addition, this study considered the case in which the system is divided into several smaller reactors of equal sizes and a constant amount of catalyst. In these reactors, we saw that the methane conversion and hydrogen flow rate were reduced. The results indicate that the installation of as many heating tubes as possible is preferable.
Highlights
Extensive use of hydrocarbons as an energy source has resulted in the global increase of temperatures and abnormal climate changes
We investigated the effect of the geometry of the heating tube on methane dry reforming while maintaining a fixed total volume of the catalyst or heating tube. us, the radius of the heating tube decreases with the increase in the number of heating tubes
The maintaining of a uniform high-temperature distribution is important for high methane conversion and hydrogen yield rates
Summary
Extensive use of hydrocarbons (fossil fuels) as an energy source has resulted in the global increase of temperatures and abnormal climate changes. Recent studies have pointed out that carbon dioxide and methane (more harmful than carbon dioxide) are the chief greenhouse gases. Both the reduction of these greenhouse emissions and the sufficient energy supply to the energy demands let one accelerate to find alternative energy sources. There are several fuels to reform, such as methane, ethanol, ammonia, and methanol. E methane reforming method is categorized into several types: steam [1], dry (carbon dioxide) [2], partial oxidation [3], and autothermal reforming methods [4]. As for the methods, methane steam reforming is still the cheapest and most wellestablished reforming method despite its drawbacks, such as sintering and sulfur poisoning
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
