(462a) A General Adsorption/Reaction Framework for Modular and Multi-Functional Process Design
- Conference: AIChE Annual Meeting
- Year: 2017
- Proceeding: 2017 AIChE Annual Meeting
- Group: Topical Conference: Process Intensification & Modular Chemical Processing
Wednesday, November 1, 2017 - 8:00am-8:25am
Next, in order to accurately predict the performance of different processes generated via multi-material design, we develop Generalized Reaction-Adsorption Model (GRAM) â a high-fidelity process model for dynamic adsorption-reaction systems. GRAM is a one-dimensional, pseudo-homogeneous, non-isothermal, non-adiabatic, and non-isobaric model that captures the reaction and adsorption dynamics in hybrid adsorption-reaction systems. The model is validated using different experimental data from literature. Specifically, the model predictions show agreement with experimental observations for sorption-enhanced steam-methane reforming (SMR)[1,3], sorption-enhanced reverse water gas shift (RWGS), and conventional SMR[4,5]. Computationally, the model handles multi-feed, multi-functional and multi-product processes well.
The GRAM model is further incorporated within the multi-material design framework to design several novel multifunctional modular processes for cost-effective carbon capture and utilization using unconventional energy sources such as stranded and distributed natural gas, CO2-contaminated shale gas, biogas, landfill gas, fuel gas and flare gas. The objective is to produce valuable products such as hydrogen and syngas. Computational studies are performed for several configurations of the column containing (i) pure catalyst, (ii) pure adsorbent, (iii) heterogeneously-compartmentalized adsorbent and catalyst, and (iv) homogeneously-distributed uniform mixture of adsorbent and catalyst. These intensified processes use sections of adsorbent and catalyst for simultaneous capture and conversion of reactants.
 Carvill, B.T., Hufton, J.R., Anand, M., Sircar, S. Sorption-Enhanced Reaction Process. AIChE Journal. 1996.
 Jang, H.M., Lee, K.B., Caram, H.S., Sircar, S. High-purity hydrogen production through sorption enhanced water gas shift reaction using K2CO3-promoted hydrotalcite. Chemical Engineering Science. 2012.
 Hufton, J.R., Mayorga, S., Sircar, S. Sorption-enhanced reaction process for hydrogen production. AIChE Journal. 1999.
 Shu, J., Grandjean, B.P.A., Kaliaguine, S. Methane steam reforming in asymmetric Pd- and Pd-Ag/porous SS membrane reactors. Applied Catalysis. 1994.
 Gallucci, F., Paturzo, L., Basile, A. A simulation study of the steam reforming of methane in a dense tubular membrane reactor. International Journal of Hydrogen Energy. 2004.