Simulation of Sorbent-Enhanced Steam Methane Reforming and Limestone Calcination in Dual Turbulent Fluidized Bed Reactors

Abstract

This paper presents a steady-state simulation of sorbent-enhanced steam methane reforming in turbulent fluidized bed reactors. The effects of different operating conditions are assessed, including the reactor temperature, operating pressure, gas feed composition, and sorbent/methane molar feed ratio. The potential system performance is also evaluated when hydrogen perm-selective membranes are installed inside the reactor. Increasing the sorbent/methane molar feed ratio and decreasing the methane feed concentration can enhance the methane conversion, hydrogen yield, and product purity. On the other hand, the reactor performance depends strongly upon the system pressure, with higher temperatures required for pressurized operation. In situ hydrogen removal is shown to enhance the methane conversion and hydrogen production yield, while reducing the hydrogen concentration in the reformer off-gas. A predictive model is used to determine the operating conditions required for steam and methane-concentrated oxy-fuel calciners. The methane-concentrated oxy-fuel calciner is shown to benefit from a lower reactor temperature, higher hydrogen production yield, and lower CO2 emissions.

Process Simulations of High-Purity and Renewable Clean H2 Production by Sorption Enhanced Steam Reforming of Biogas

“…In Case 3, H 2 purity reaches a value of 100% for all S/CH 4 ratios (Figure c) due to the PSA unit purifying H 2 . The effect of the S/CH 4 ratio on the H 2 purity is in agreement with the literature since higher CH 4 conversion leads to higher H 2 production and less off-gas methane contaminant content …”

Recent Developments in Natural Gas Flaring Reduction and Reformation to Energy-Efficient Fuels: A Review

“…For the past many decades, several efforts have been done toward improving the energy efficiency of the SRM process . The efficiency of the SRM reaction is dependent on the catalyst performance; therefore, designing a catalyst for obtaining high activity with good stability for efficient syngas production is a real challenge. , Catalyst parameters such as active sites, support type, and synthesis method are significant parameters in designing a catalyst for the SRM process. , Various catalyst types are used for the SRM process such as noble metals (Ru, Pd, Rh, and Pt) with different supports. Furthermore, noble metals are very active and resistant to coke formation, but they are very expensive and make this process costly.…”

“…225,226 Catalyst parameters such as active sites, support type, and synthesis method are significant parameters in designing a catalyst for the SRM process. 227,228 Various catalyst types are used for the SRM process such as noble metals (Ru, Pd, Rh, and Pt) with different supports. Furthermore, noble metals are very active and resistant to coke formation, but they are very expensive and make this process costly.…”