Sustainable Electrochemical Conversion of Lignin to Renewable Chemicals with Simultaneous Hydrogen Production Via a Continuous Flow Electrochemical Reactor

Fermentative hydrogen production was carried out using a continuous flow stirred tank reactor (CSTR) for the investigation of the hydrogen content in the biogas. Molasses was used as the substrate; hydraulic retention time (HRT) was 6 h; the temperature was in the range of 35±1 .It was showed that hydrogen content increased from 38% to 59% when pH decreased from 5 to 4.6 with oxidation-reduction potential (ORP) increased from -420 mV to -380 mV. The hydrogen content dropped from 50% to 30% as influent COD was improved from4000 mg/L to 6000 mg/L. Hydrogen content increased to 35% when influent COD was improved to 7000 mg/L, however decreased to 25% when influent COD was 8000 mg/L. Ethanol in terminal products is accompanied with hydrogen production but with lower hydrogen content. Butyric acid indicates higher hydrogen content than ethanol.

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The dynamics and stability of a continuous- flow stirred tank electrochemical reactor (CSTER)

Electrochimica Acta ◽

10.1016/0013-4686(86)87105-5 ◽

1986 ◽

Vol 31 (2) ◽

pp. 173-180 ◽

Cited By ~ 2

Author(s):

J.T. Mulvale ◽

T.Z. Fahidy

Keyword(s):

Continuous Flow ◽

Electrochemical Reactor ◽

Stirred Tank

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Hydrogen production from glycerol by supercritical water gasification in a continuous flow tubular reactor

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2011.12.135 ◽

2012 ◽

Vol 37 (7) ◽

pp. 5559-5568 ◽

Cited By ~ 102

Author(s):

Simao Guo ◽

Liejin Guo ◽

Changqing Cao ◽

Jiarong Yin ◽

Youjun Lu ◽

...

Keyword(s):

Hydrogen Production ◽

Supercritical Water ◽

Continuous Flow ◽

Tubular Reactor ◽

Supercritical Water Gasification

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Simulation of transport phenomena in a photo-electrochemical reactor for solar hydrogen production

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2015.12.218 ◽

2016 ◽

Vol 41 (19) ◽

pp. 8020-8031 ◽

Cited By ~ 19

Author(s):

Ali M. Qureshy ◽

Mahmoud Ahmed ◽

Ibrahim Dincer

Keyword(s):

Hydrogen Production ◽

Transport Phenomena ◽

Electrochemical Reactor ◽

Solar Hydrogen ◽

Solar Hydrogen Production

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Integrating CO2 capture with electrochemical conversion using amine based capture solvents as electrolytes

10.21203/rs.3.rs-62459/v1 ◽

2020 ◽

Author(s):

Elena Pérez-Gallent ◽

Chirag Vankani ◽

Anca Anastasopol ◽

Earl Goetheer

Keyword(s):

Formic Acid ◽

Carbon Capture ◽

Negative Impact ◽

Direct Conversion ◽

Electrochemical Reactor ◽

Operational Cost ◽

Electrochemical Conversion ◽

Commodity Chemicals ◽

Physical Absorption ◽

Carbon Monoxide Formation

Abstract Carbon dioxide (CO2) is currently considered as a waste material due to its negative impact on the environment. However, it is possible to create value from CO2 by capturing and utilizing it as a building block for commodity chemicals. Electrochemical conversion of CO2 has excellent potential for reducing greenhouse gas emissions and reaching zero net emissions by 2050. To date, Carbon Capture and Utilization (CCU) technologies have been studied independently. We report a novel methodology based on the integration of CO2 capture and conversion by the direct utilization of a CO2 capture media as electrolyte for electrochemical CO2 conversion. This has a high potential for reducing capital and operational cost when compared to traditional methodologies. A novel mixture of chemical and physical absorption solvents allowed for the captured CO2 to be converted to formic acid with faradaic efficiencies up to 50 % and with carbon conversion of ca. 30 %. By increasing the temperature in the electrochemical reactor from 20 °C to 75 °C, the productivity towards formic acid increased by a factor of 10, reaching up to 0.7 mmol∙m-2·s-1. The direct conversion of captured CO2 was also demonstrated for carbon monoxide formation with faradaic efficiencies up 45 %.

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