Methanation of carbon dioxide by hydrogen reduction using the Sabatier process in microchannel reactors

Variable‐Temperature IR Spectroscopic and Theoretical Studies on CO2 Adsorbed in Zeolite K‐FER

“…Aside from CCS, improved CO 2 adsorbents could find several other practical applications, such as removal of CO 2 from natural gas to improve its energy density [6] and purification of breathing air (e.g., in submarines and spacecraft for long-term space missions). [7] Among prospective porous solids for reversible CO 2 adsorption, metal-organic frameworks (MOFs) and related compounds, [8][9][10][11][12][13][14] porous carbons, [15][16][17][18][19] and zeolites [20][21][22][23][24][25][26][27][28][29][30][31][32] are the main types receiving current attention. For several reasons, zeolites are particularly well suited for fundamental studies aimed at detailed understanding of the gas-solid interactions that dictate adsorption thermodynamics, which is a main factor determining adsorbent performance: 1) zeolites have well-defined (and known) crystal structures, 2) they can easily undergo cation exchange, and 3) zeolites display a wide topological variety.…”

Compact and Lightweight Sabatier Reactor for Carbon Dioxide Reduction

“…Recently, researchers at Pacific Northwest National Lab (PNNL) have designed and tested catalytic microchannel reactors for the Sabatier process, and have shown improved CO 2 conversion due to better heat and mass transfers compared to the traditional packed-bed reactors. 7,8 Despite the performance improvement demonstrated by the microchannel reactors, the highest obtainable CO 2 conversion was still relatively low at high throughputs (i.e., ≥30,000 hr -1 ). 6,7 Additionally, the CO 2 conversion decreased from 70% to ~62% during 4 days of operation (i.e., ~100 hours) and further decreased to ~50% at the end of the 14-day testing period indicating significant catalyst deactivation.…”

“…Additionally, the use of the Sabatier process as part of the In-Situ Resource Utilization (ISRU) application for on-site production of life support consumables and propellants from Lunar and Martian regolith (i.e., CO 2 and CO from carbothermal reduction of regolith or from the Martian atmosphere) is of interest to NASA. [6][7][8] In the Sabatier or CO 2 methanation process, CO 2 reacts with hydrogen in the presence of catalysts to produce methane and water, as shown in Eq. (1) Similarly, trace CO can also catalytically react with hydrogen to produce methane and water as shown in Eq.…”

Optimization and simulation of the Sabatier reaction process in a packed bed

“…Recently, to further improve the steep axial gradient of temperature and reduce the volume and power consumption of the reaction system, Junaedi 6 replaced the powder catalyst with PCI's Microlith substrates. Brooks 7 employed the microchannel reactors to perform this reaction in the intrinsic kinetics region.…”