The utilization of dry reforming is therefore accompanied by two crucial benefits.
Nevertheless, synthesis gas, the product of CH 4 dry reforming, is a vital raw material for the production of liquid hydrocarbons. The carbon dioxide, methane reforming universally known as dry reforming (DRM) is a convenient method for producing synthesis gases from two powerful greenhouse gases (CH 4 and CO 2). The characterizations of the Raman, EDX, TGA, and TPO all presented the formation of carbon. Hence, the TGA profile indicated the relative carbon deposition on the catalyst, which was dependent of the operated pressure and hence confirmed the suitability operation pressure of 1 bar. However, the 7 bar operated catalyst resulted the highest accumulation of carbon formation, equivalent to 83% weight reduction. The catalyst operated at 1 bar produced the least amount of carbon, equivalent to 35% weight loss, while the 3 and 5 bar operated catalysts generated carbon formation, equivalent to 65% weight loss. The TGA analysis showed the drop of mass due to oxidation of carbon deposits, which started at 500 ☌. Similarly, the time on stream tests, obtained at a 700 ☌ reaction temperature, showed that the best ratio in terms of the closeness of unity and the stable profile could be attained when the pressure was set to 1 bar. A unity ratio of H 2/CO was obtained at 1 bar for temperatures 600 ☌ and above. The increase of reaction temperatures from 500 ☌ to 800 ☌ increased the reaction rate and hence the methane and carbon dioxide conversions were increased.
CH 4 and CO 2 conversions of 77 and 80% were obtained at 1 bar and at 700 ☌ reaction temperature. The characterization results indicated that catalysts operated at 1 bar, gas hourly space velocity of 84000 (mL/g/h) gave the best catalytic performance. In addition, the effect of operating pressure, namely, 1 bar, 3 bar, 5 bar, and 7 bar, temperature (500–800 ☌) was evaluated. The prepared samples were characterized by N 2 adsorption/desorption, TPR, XRD, CO 2-TPD, TGA, TPO, Raman, and SEM techniques.
The perovskite catalyst was prepared using a sol–gel method. In this paper, a comprehensive study was carried out on the application of perovskite catalyst in dry reforming of CH 4.
0 kommentar(er)
