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A novel approach to the decomposition of biogas consisting in the simultaneous production of syngas (H2 and CO mixture) and bio-nanostructured filamentous carbon (BNFC) is proposed. Catalysts with different active phases such as Ni, Co or Fe on Al2O3 are studied in the temperature range between 600 and 900°C. Their behavior was analyzed considering CH4 and CO2 conversions, reaction rates, catalyst...
Hydrogen production plus purification has been studied by the joint use of methane dry reforming (MDR) and the reduction–oxidation of iron oxides (Steam-Iron Process or SIP) within the same reactor. The raw material studied has been an equimolar mixture of CH4 and CO2 simulating the composition of a biogas exempt of any other contaminant. The study has been mainly carried out by thermogravimetry,...
In this experimental investigation, de-oiled seed cake of Karanja (SCK), an organic industrial waste obtained from Karanja biodiesel industries was mixed with cow dung (CD) in four different proportions, viz., 75:25, 50:50, 25:75, and 0:100 percentages on a mass basis, and the mixtures were denoted as sample S1, S2, S3 and S4 respectively. The samples were kept in four different reactors and investigated...
The main objective of this work has been to study the catalytic activity in the conversion of biogas to Syngas of a Ni/Ce 0.82 Sm 0.18 O 1.91 oxide system, which could be used as a component in the anode material of a SOFC directly fed with biogas.The solids were active without need of pretreatment with a stable behavior during a time on stream of six hours for a carbon dioxide...
Chemical kinetic aspects of the combustion of biogas (containing CH4,CO2 and possibly H2) have been investigated. Five reaction mechanisms were considered and tested with respect to the ignition delay times of H2–CO2–O2 and CH4–CO2–O2 mixtures measured in shock tubes. While the GRI (Gas Research Institute) mechanism 3.0 could not reproduce the first set of measurements, it brought up the best match...
The aim of this work is to evaluate the performance of PEEK membrane modules modules membrane with two different configurations plant in order to obtain low pressure biomethane usable directly in the secondary grid injection with a pressure lower than 10bar. Two configurations were studied: high recovery configuration and high power configuration and for each one an energetical evaluation was carried...
A well-known and widespread method for producing a hydrogen-rich gas stream consists of reforming processes that convert a hydrocarbon, by adopting a substance, usually steam, to act as reforming promoter.CO2 dry reforming allows the use of CO2 as a reforming agent, which appeals owing to the undeniably negative environmental impact of CO2. This technology opens up interesting perspectives in the...
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