Hydrogen Production from Glucose and Cellulose Using Radio Frequency In-Liquid Plasma and Ultrasonic Irradiation

Abstract

The purpose of this study is to efficiently produce hydrogen gas from saccharide using 27.12 MHz radiofrequency (RF) in-liquid plasma with and without ultrasonic irradiation. The experiments were conducted adopting two different ultrasonic frequencies, one from a 29 kHz horn-type ultrasonic transducer and the other from a 1.6 MHz piezoelectric transducer. The glucose solution and cellulose suspension concentrations were varied from 0.5 wt% to 50 wt% and 0.5 wt% to 20 wt% respectively. Hydrogen gas was then produced by the decomposition of the glucose solution and cellulose suspension by RF in-liquid plasma with and without ultrasonic irradiation. The hydrogen production rate from glucose solution with ultrasonic irradiation applied was greater than that without ultrasonic irradiation. However, no hydrogen production rate enhancement was observed from decomposition of cellulose suspension with ultrasonic irradiation applied. Ultrasonic atomization and agitation enhanced the chemical reaction of nonvolatile glucose in in-liquid plasma. The increase of the gas production rate was caused by the direct decomposition of the glucose by the plasma due to the atomized glucose molecules being fed into the plasma in a bubble. In addition, by using a high-speed camera, it was clarified that acoustic streaming occurred when a 1.6 MHz piezoelectric transducer was used in the experiment.

A Novel Method for Producing Hydrogen from a Hydrocarbon Liquid Using Microwave In-liquid Plasma

“…When discharge occurs in a liquid, in most cases, bubbles appear. There have been many reports which focused on bubbles in relation to the generation of plasma in a liquid by a variety of methods [32][33][34][35]. The behavior of bubbles and plasma generated by high frequency waves and microwaves is observed using a high speed camera [36][37][38][39].…”

Decomposition of Saccharides and Alcohols in Solution Plasma for Hydrogen Production

“…Tange et al [28] reported that high electrolyte concentration promotes plasma growth and improves the H 2 yield in the radiofrequency solution-plasma treatment of cellulose suspensions. Syahrial et al [29] found that ultrasonic irradiation improves the H 2 -production rate in the solution plasma of aqueous glucose solution. Ismail et al [30] showed that in the radiofrequency solution-plasma treatment of cellulose suspensions, gasification is enhanced when the cellulose concentration is high because cellulose enters the plasma region in granular form.…”

Spectroscopic Measurement of High Argon Jet Plasma Flow Rate for Methane Hydrate Decomposition

“…During recent years, there has been an increasing interest in plasma technology on account of the adaptability of its application in nanoparticle production [1-3], surface and coating modification [4][5][6], sterilization [7], fuel gas and hydrogen production [8][9][10][11] to name a few. A higher production rate, more straightforward reaction mechanism, and high reactivity that enhance the chemical reaction rate are some of the advantages of using plasma technology.…”