Birch (Betula pubescens) was steam exploded at 13 different conditions with temperatures ranging from 170 to 230 °C and residence times ranging from 5 to 15 min. Increasing severity in the pretreatment led to degradation of xylan and formation of pseudo-lignin. The effect of the pretreatments was evaluated by running enzymatic saccharification and anaerobic digestion followed by analysis of sug...

The influence of operation temperature, inlet gas composition, current density and the anode thickness on methane steam reforming reaction over nickel yttria-stabilized zirconia anodes was experimentally studied in solid oxide fuel cells. experimental results were analyzed using data fitting Power-Law Langmuir–Hinshelwood kinetic models. Similar trends dependence partial pressures observed both...

steam reforming is one of the most important processes for producing hydrogen from hydrocarbon fuels such as lpg and has attracted much attention due to its high efficiency and economy. in this study, the lpg steam reforming reaction was investigated on nickel catalysts supported on four various zeolites (h-y, na-y, hzsm5 and ferrierite). the catalytic tests were performed in a tubular fixed be...

Utilization of methane to produce chemicals has become attractive due to significantly reduced prices for methane gained from recent development in natural gas recovery. However, the lack of suitable catalysts for methane conversion (other than steam reforming) hinders its advances. While intensive research has been conducted on oxidative methane upgrading over decades, the carbon selectivity a...

In this study, the modeling of hydrogen production process in microreactors by methanol-steam reforming reaction is investigated. The catalytic reaction of methanol-steam reforming producing hydrogen is simulated considering a 3D geometry for the microreactor. To calculate diffusion among species, mixture average correlations are compared to Stephan-Maxwell equations. The reactions occurring in...

Three conventional and novel hydrogen and liquid fuel production schemes, i.e. steam methane reforming (SMR), solar SMR, and hybrid solar-redox processes are investigated in the current study. H2 (and liquid fuel) productivity, energy conversion efficiency, and associated CO2 emissions are evaluated based on a consistent set of process conditions and assumptions. The conventional SMR is estimat...

The combined dry-steam reforming (CDSR) of a model biogas (66 % CH4 + 34 CO2) has been investigated under various feed compositions and reaction temperature conditions over Ni-Rh/MgAl2O4 catalyst, with the objective to convert excess methane (compared by steam (SR). Methane, however, appeared react preferentially H2O rather than CO2, leading an inhibition dry (DR) in presence steam. CO2 adsorpt...

Thermodynamic equilibrium analysis of the steam methane reforming process to synthesis gas was studied. For this purpose, system chemical reactions for carbon production and consumation as well other side reaction in were analysed. The material balance equations law mass action obtained various reactions. those solved by dichotomy method. investigation performed a wide range operational conditi...