Medium pressure hydrate based gas separation (HBGS) process for pre-combustion capture of carbon dioxide employing a novel fixed bed reactor

As one of the fundamental issues of the new poly-generation system on the basis of gasification gas and coke oven gas, carbon dioxide reforming of methane experiments have been performed over coal chars derived from different parent coals in a lab-scale fixed-bed reactor (internal diameter 12 mm, length 700 mm). The char derived from TongChuan coal exhibited higher activity than other samples employed under the same conditions. After the reforming reaction, the char samples were covered with different amounts of carbon deposition which resulted in the surface areas decrease. As the flow rate of feed gas increased from 200 ml/min to 600 ml/min over the Xuzhou char sample at 1050 degrees Celsius, the conversion of methane decreased from 52.7% to 17.5% and the H2 /CO dropped from 0.75 to 0.55. While maintaining the flow rate of CO2 at 20ml/min at 1050 degrees Celsius, the mole ratio of reactants CH4/CO2 was varied from 1 to 1.75 which led to the H2/CO ratio increase from 0.75 to 1.2.

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Hydrate-Based Carbon Capture Process: Assessment of Various Packed Bed Systems for Boosted Kinetics of Hydrate Formation

Journal of Energy Resources Technology ◽

10.1115/1.4048304 ◽

2020 ◽

Vol 143 (3) ◽

Cited By ~ 1

Author(s):

Amit Arora ◽

Asheesh Kumar ◽

Gaurav Bhattacharjee ◽

Chandrajit Balomajumder ◽

Pushpendra Kumar

Keyword(s):

Carbon Dioxide ◽

Carbon Capture ◽

Carbon Dioxide Capture ◽

Fixed Bed ◽

Hydrate Formation ◽

Packed Bed ◽

Fixed Bed Reactor ◽

Capture Process ◽

Novel Technologies ◽

Kinetics Of

Abstract The case for developing novel technologies for carbon dioxide (CO2) capture is fast gaining traction owing to increasing levels of anthropogenic CO2 being emitted into the atmosphere. Here, we have studied the hydrate-based carbon dioxide capture and separation process from a fundamental viewpoint by exploring the use of various packed bed media to enhance the kinetics of hydrate formation using pure CO2 as the hydrate former. We established the fixed bed reactor (FBR) configuration as a superior option over the commonly used stirred tank reactor (STR) setups typically used for hydrate formation studies by showing enhanced hydrate formation kinetics using the former. For the various packing material studied, we have observed silica gel with 100 nm pore size to return the best kinetic performance, corresponding to a water to hydrate conversion of 28 mol% for 3 h of hydrate growth. The fundamental results obtained in the present study set up a solid foundation for follow-up works with a more applied perspective and should be of interest to researchers working in the carbon dioxide capture and storage and gas hydrate fields alike.

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Kinetics of carbon dioxide gasification of coal/calcium-catalysed coal in a fixed bed reactor

Fuel ◽

10.1016/0016-2361(93)90645-i ◽

1993 ◽

Vol 72 (5) ◽

pp. 710

Author(s):

P.K. Dey

Keyword(s):

Carbon Dioxide ◽

Fixed Bed ◽

Fixed Bed Reactor ◽

Kinetics Of ◽

Carbon Dioxide Gasification

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Hydrogenation of carbon dioxide into methanol on a Cu/Zn/Al2O3 catalyst in a fixed-bed reactor

10.1063/1.5064321 ◽

2018 ◽

Author(s):

Yuswan Muharam ◽

Ardha Bariq Fardiansyah

Keyword(s):

Carbon Dioxide ◽

Fixed Bed ◽

Fixed Bed Reactor ◽

Al2o3 Catalyst ◽

Hydrogenation Of Carbon Dioxide

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The Effect of Temperature-Pressure Conditions on the RDF Gasification in the Atmosphere of Steam and Carbon Dioxide

Energies ◽

10.3390/en14227502 ◽

2021 ◽

Vol 14 (22) ◽

pp. 7502

Author(s):

Katarzyna Śpiewak ◽

Grzegorz Czerski ◽

Karol Bijak

Keyword(s):

Carbon Dioxide ◽

Fixed Bed ◽

Mercury Content ◽

Steam Gasification ◽

Fixed Bed Reactor ◽

Effect Of Temperature ◽

Process Conditions ◽

Refuse Derived Fuel ◽

Negative Effect ◽

Main Components

This research aimed to assess the process conditions, temperature and pressure, on the gasification of alternative refuse-derived fuel (RDF) in the atmosphere of steam and carbon dioxide on a laboratory scale using a fixed bed reactor. For this reason, the selected RDF were analysed, including proximate and ultimate analysis, mercury content and ash composition. After that, isothermal gasification measurements using the thermovolumetric method were performed under various temperatures (700, 750, 800, 900 °C) and pressures (0.5, 1, 1.5 MPa), using steam and carbon dioxide as gasifying agents. The obtained results showed that in the entire analysed range, the increase in temperature positively affect both the steam and CO2 gasification of RDF. The formation rates of main components (H2 and/or CO) of the resulting gas, as well as yields of gas components and maximum carbon conversion degrees increase. However, this positive effect was the greater, the lower the process pressure was. In turn, the effect of pressure was more complex. In the case of RDF steam gasification, an increase in pressure had a negative effect on the process, while when using carbon dioxide as a gasifying agent, an improvement of most analysed parameters was observed; however, only at low temperatures, 700–750 °C.

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Mathematical Modelling of Catalytic Fixed-Bed Reactor for Carbon Dioxide Reforming of Methane over Rh/Al2O3 Catalyst

BULLETIN OF CHEMICAL REACTION ENGINEERING AND CATALYSIS ◽

10.9767/bcrec.3.1-3.7120.21-29 ◽

2008 ◽

Vol 3 (1-3) ◽

Author(s):

Nor Aishah Saidina Amin ◽

Istadi Istadi ◽

New Pei Yee

Keyword(s):

Carbon Dioxide ◽

Mathematical Modelling ◽

Fixed Bed ◽

Fixed Bed Reactor ◽

Carbon Dioxide Reforming ◽

Al2o3 Catalyst

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Slow Pyrolysis of Cystoseira Barbata Brown Macroalgae

Revista de Chimie ◽

10.37358/rc.18.3.6147 ◽

2018 ◽

Vol 69 (3) ◽

pp. 553-556 ◽

Cited By ~ 1

Author(s):

Doinita Roxana Cioroiu ◽

Oana Cristina Parvulescu ◽

Tanase Dobre ◽

Cristian Raducanu ◽

Claudia Irina Koncsag ◽

...

Keyword(s):

Carbon Dioxide ◽

Fixed Bed ◽

Fixed Bed Reactor ◽

Bet Surface Area ◽

Heat Flow Rate ◽

Slow Pyrolysis ◽

Process Factor ◽

Bed Temperature ◽

Cystoseira Barbata ◽

Bio Oil

Slow pyrolysis of algal biomass of Cystoseira barbata was performed in a fixed bed reactor using carbon dioxide as a sweeping gas and a reactant in the process. Pyrolysis products consisted of a biochar, a bio-oil, and pyrolytic gases. According to a 23 factorial experiment, 8 tests were conducted for 1 hr at two levels of each process factor, i.e., specific heat flow rate (7540, 9215 W/m3), carbon dioxide superficial velocity (1.3, 2.6 cm/s), and bulk density of fixed bed biomass (221, 332 kg/m3). Correlations between these factors and final process responses in terms of mean bed temperature (461-663 oC), biochar yield (15.2-26.7%), bio-oil yield (29.9-34.8%), and BET surface area of biochar (45.17-91.12 m2/g) were established.

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