Preprint Article Version 1 This version is not peer-reviewed

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

Version 1 : Received: 30 January 2019 / Approved: 31 January 2019 / Online: 31 January 2019 (14:20:08 CET)

A peer-reviewed article of this Preprint also exists.

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. 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.

Journal reference: Processes 2019, 7, 114
DOI: 10.3390/pr7020114

Abstract

The motivation of this work is to investigate experimentally the influence of non-thermal 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.

Subject Areas

non-thermal plasma; charcoal gasification; carbon conversion; hydrogen release; reaction kinetics; reaction mechanism

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