Application of three cathodes reactor for stream reforming of propane at atmospheric pressure

International audienc

Syngas Production from Propane Using Atmospheric Non-thermal Plasma

International audiencePropane steam reforming using a sliding discharge reactor was investigated under atmospheric pressure and low temperature (420 K). Non-thermal plasma steam reforming proceeded efficiently and hydrogen was formed as a main product (H2 concentration up to 50%). By-products (C2-hydrocarbons, methane, carbon dioxide) were measured with concentrations lower than 6%. The mean electrical power injected in the discharge is less than 2 kW. The process efficiency is described in terms of propane conversion rate, steam reforming and cracking selectivity, as well as by-products production. Chemical processes modelling based on classical thermodynamic equilibrium reactor is also proposed. Calculated data fit quiet well experimental results and indicate that the improvement of C3H8 conversion and then H2 production can be achieved by increasing the gas fraction through the discharge. By improving the reactor design, the non-thermal plasma has a potential for being an effective way for supplying hydrogen or synthesis gas

CO2 Reforming of CH4 in a non thermal plasma reactor at atmospheric pressure

International audienceHydrogen-rich gas can be efficiently produced in compact plasma reformers by the conversion of a variety of hydrocarbon fuels including natural gas and gasoline. This article describes a first approach in non thermal plasma reforming of methane with carbon dioxide. Experiments have been carried out in a compact device operating at low consumed power (100 - 200 W). Experiments demonstrated clearly the plasma ability to convert CO2 and CH4. A high level of hydrogen was obtained ([H2] up to 25 %). System efficiency was investigated as a term of both CO2 and CH4 conversion and syngas productio

Novel sliding discharge reactor for hydrogen production through hydrocarbons

International audienceHydrogen-rich gas can be efficiently produced in compact plasma reformers by the conversion of a variety of hydrocarbon fuels including natural gas and gasoline. This paper presents a study of progress in syngaz production field from propane and methane using a sliding discharge reactor. Experiments have been carried out in a compact device operating at low consumed power (1-2 kW). Studies were achieved at atmospheric pressure and a temperature equal to 150 °C. For both methane and propane a high level hydrogen production (up to 55 %) was obtained. In addition a small amount of by-products (C2 hydrocarbons and CO2) were produced. The process efficiency is described in terms of hydrocarbon conversion, steam reforming and cracking selectivity, syngas and by-products production

Hydrogen production by methane, propane and ethanol via non-thermal plasma reactors

International audienc

Hydrogen generation from alkanes and alcohol by non-thermal plasma steam reforming

International audienc

Capacitively coupled plasma used to simulate Titan's atmospheric chemistry

International audienceA complex chemistry in Titan's atmosphere leads to the formation of organic solid aerosols. We use a radio-frequency (RF) capacitively coupled plasma discharge produced in different N2–CH4 mixtures (from 0% to 10% of CH4) to simulate this chemistry. The work presented here was devoted to the study of the plasma discharge. In our experiment, the electron density is measured by the resonant cavity method and is about 1015 m−3 in pure N2 plasma at 30 W excitation RF power. It decreases by a factor of 2 as soon as CH4 is present in the discharge, even for a proportion as small as 2% of CH4. An optical emission spectroscopy diagnostic is installed on the experiment to study the evolution of the N2 bands and to perform actinometry measurements using Ar lines. This diagnostic allowed us to measure variations in the electron temperature and to show that a decrease in the density of the electrons can be compensated by an increase in their energy. We have also used an experimental setup where the plasma is tuned in a pulsed mode, in order to study the formation of dust particles. We observed variations in the self-bias voltage, the RF injected power and the intensities of the nitrogen bands, which indicated that dust particles were formed. The characteristic dust formation time varied, depending on the experimental conditions, from 4 to 110 s. It was faster for higher pressures and for smaller proportions of CH4 in the gas mixture

Study of a CCP RF Dusty Plasma for the Production of Titan's Aerosols Analogues

he CCP-RF discharge PAMPRE experiment produces analogues of Titan's aerosols. Here are presented the plasma characteristics as a function of gas mixtures and dust formation. Electronic density, optical emission spectroscopy, and self-bias voltage measurements are presente

Physical and chemical properties of dust produced in a N2-CH4 RF plasma discharge

Titan's atmospheric chemistry is simulated using a Capacitively Coupled Plasma discharge produced in a N2-CH4 mixture. The produced solid particles are analysed ex-situ. Chemical properties are deduced from: elemental composition, FTIR and LTQ-Orbitrap mass spectrometer. Optical properties are deduced from reflectivity in visible and IR rang