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Title: A novel low-thermal-budget approach for the co-production of ethylene and hydrogen via the electrochemical non-oxidative deprotonation of ethane

Abstract

Here, the oversupply of ethane, a major component of natural gas liquids, has stimulated the wide applications of ethylene since the shale gas revolution. However, ethylene production is energy-intensive and represents the most energy-consuming single process in the chemical industry. In this communication, we report, for the first time, a novel low-thermal-budget process for the co-production of ethylene and pure hydrogen using a proton-conducting electrochemical deprotonation cell. At a constant current density of 1 A cm–2, corresponding to a hydrogen production rate of 0.448 mol cm–2 per day, and 400 °C, a close to 100% ethylene selectivity was achieved under an electrochemical overpotential of 140 mV. Compared to an industrial ethane steam cracker, the electrochemical deprotonation process can achieve a 65% saving in process energy and reduce the carbon footprint by as much as 72% or even more if renewable electricity and heat are used. If the heating value of produced hydrogen is taken into account, the electrochemical deprotonation process actually has a net gain in processing energy. The electrochemical deprotonation process at reduced temperatures in the present study provides a disruptive approach for petrochemical manufacturing, shifting the paradigm from thermal chemical practice to a clean energy regime.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [2]; ORCiD logo [1]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  2. Georgia Inst. of Technology, Atlanta, GA (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1481737
Alternate Identifier(s):
OSTI ID: 1434113
Report Number(s):
INL/JOU-17-43375-Rev000
Journal ID: ISSN 1754-5692; EESNBY
Grant/Contract Number:  
AC07-05ID14517
Resource Type:
Accepted Manuscript
Journal Name:
Energy & Environmental Science
Additional Journal Information:
Journal Volume: 11; Journal Issue: 7; Journal ID: ISSN 1754-5692
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; 04 OIL SHALES AND TAR SANDS; Ethylene production; electrochemical deprotonation; low-thermal-budget; carbon footprint; proton conductors

Citation Formats

Ding, Dong, Zhang, Yunya, Wu, Wei, Chen, Dongchang, Liu, Meilin, and He, Ting. A novel low-thermal-budget approach for the co-production of ethylene and hydrogen via the electrochemical non-oxidative deprotonation of ethane. United States: N. p., 2018. Web. doi:10.1039/C8EE00645H.
Ding, Dong, Zhang, Yunya, Wu, Wei, Chen, Dongchang, Liu, Meilin, & He, Ting. A novel low-thermal-budget approach for the co-production of ethylene and hydrogen via the electrochemical non-oxidative deprotonation of ethane. United States. doi:10.1039/C8EE00645H.
Ding, Dong, Zhang, Yunya, Wu, Wei, Chen, Dongchang, Liu, Meilin, and He, Ting. Wed . "A novel low-thermal-budget approach for the co-production of ethylene and hydrogen via the electrochemical non-oxidative deprotonation of ethane". United States. doi:10.1039/C8EE00645H. https://www.osti.gov/servlets/purl/1481737.
@article{osti_1481737,
title = {A novel low-thermal-budget approach for the co-production of ethylene and hydrogen via the electrochemical non-oxidative deprotonation of ethane},
author = {Ding, Dong and Zhang, Yunya and Wu, Wei and Chen, Dongchang and Liu, Meilin and He, Ting},
abstractNote = {Here, the oversupply of ethane, a major component of natural gas liquids, has stimulated the wide applications of ethylene since the shale gas revolution. However, ethylene production is energy-intensive and represents the most energy-consuming single process in the chemical industry. In this communication, we report, for the first time, a novel low-thermal-budget process for the co-production of ethylene and pure hydrogen using a proton-conducting electrochemical deprotonation cell. At a constant current density of 1 A cm–2, corresponding to a hydrogen production rate of 0.448 mol cm–2 per day, and 400 °C, a close to 100% ethylene selectivity was achieved under an electrochemical overpotential of 140 mV. Compared to an industrial ethane steam cracker, the electrochemical deprotonation process can achieve a 65% saving in process energy and reduce the carbon footprint by as much as 72% or even more if renewable electricity and heat are used. If the heating value of produced hydrogen is taken into account, the electrochemical deprotonation process actually has a net gain in processing energy. The electrochemical deprotonation process at reduced temperatures in the present study provides a disruptive approach for petrochemical manufacturing, shifting the paradigm from thermal chemical practice to a clean energy regime.},
doi = {10.1039/C8EE00645H},
journal = {Energy & Environmental Science},
number = 7,
volume = 11,
place = {United States},
year = {2018},
month = {3}
}

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Cited by: 5 works
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Figures / Tables:

Figure 1 Figure 1: Non-oxidative deprotonation process (NDP) and cell illustration. (a) Schematic of the co-production of ethylene and hydrogen via an NDP process of ethane in a proton conducting electrochemical cell. Ethane was fed into in the anode and deprotonated to produce ethylene and protons, which transferred through the electrolyte membranemore » to cathode and combined with electrons, and eventually formed hydrogen. (b) A cross-sectional SEM image of an actual electrochemical cell after test at 400 °C. Porous BZCYYb-Ni anode (300 μm) supported BZCYYb electrolyte (10 μm) with a porous layer of PBSCF cathode on the top (30 μm).« less

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    Works referencing / citing this record:

    Thermodynamic Insights for Electrochemical Hydrogen Compression with Proton-Conducting Membranes
    journal, July 2019


    Thermodynamic Insights for Electrochemical Hydrogen Compression with Proton-Conducting Membranes
    journal, July 2019


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