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Processes 2019, 7(2), 114; https://doi.org/10.3390/pr7020114

Investigation of Nonthermal Plasma Assisted Charcoal Gasification for Production of Hydrogen-Rich Syngas

1
Chair of Energy Process Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Fürther Str. 244f, 90429 Nürnberg, Germany
2
Siemens AG, Corporate Technology, Research on Energy and Electronics, Günther-Scharowsky-Str. 1, 91058 Erlangen, Germany
*
Author to whom correspondence should be addressed.
Received: 30 January 2019 / Revised: 14 February 2019 / Accepted: 19 February 2019 / Published: 21 February 2019
(This article belongs to the Special Issue Plasma-Based Processes for Improved Energy Efficiency)
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Abstract

The motivation of this work is to investigate experimentally the influence of nonthermal plasma (NTP) application on the reaction kinetics of atmospheric pressure steam gasification of charcoal using a thermostatically controlled drop tube reactor. A gliding-arc generator provides about 1 kW electrical power NTP. For comparison thermal gasification is investigated under comparable flow and specific energy input conditions providing additional heat to the steam. Optical temperature measurement 20 cm flow down of the NTP zone is utilized to characterize the specific enthalpy of the reactive flow. The composition of produced syngas is measured by a gas analyzer and used for the calculation of gas flow rates. The results show a NTP-enhancement on the production of individual syngas components (H2, CO, CH4), especially on hydrogen production by around 39%. The syngas-based carbon conversion and hydrogen release are calculated from the carbon and hydrogen balance between the correspondent content in syngas and in the feedstock. The NTP promoted the carbon conversion and hydrogen release by 25% and 31%, respectively. The first-order reaction kinetics are determined by data-fitting in an Arrhenius diagram. The plasma enhanced the reaction rate coefficients by 27%. Based on experimental results and other literature, possible plasma-induced reactions are proposed. View Full-Text
Keywords: nonthermal plasma; charcoal gasification; carbon conversion; hydrogen release; reaction kinetics; reaction mechanism nonthermal plasma; charcoal gasification; carbon conversion; hydrogen release; reaction kinetics; reaction mechanism
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Pang, Y.; Hammer, T.; Müller, D.; Karl, J. Investigation of Nonthermal Plasma Assisted Charcoal Gasification for Production of Hydrogen-Rich Syngas. Processes 2019, 7, 114.

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