Jesús Arauzo

@article{Garcia1998,

title = {Influence of calcination and reduction conditions on the catalyst performance in the pyrolysis process of biomass},

author = {Lucía García and María L Salvador and Rafael Bilbao and Jesús Arauzo},

url = {https://pubs.acs.org/sharingguidelines},

doi = {10.1021/ef970097j},

issn = {08870624},

year  = {1998},

date = {1998-01-01},

journal = {Energy and Fuels},

volume = {12},

number = {1},

pages = {139--143},

publisher = {American Chemical Society},

abstract = {The influence of several preparation parameters on the performance of a coprecipitated nickel alumina catalyst for use in the pyrolysis of lignocellulosic residues has been studied. The variables considered were calcination temperature (750 and 850 °C), reduction time (1, 2, and 3 h), and hydrogen flow in the reduction step (1740 and 3080 cm3 (STP)/min). The catalyst performance was evaluated on a bench scale plant equipped with a continuous fluidized bed reactor using the Waterloo fast pyrolysis process (WFPP) technology. The biomass used was pine sawdust and the reaction temperature was 650 °C. The results show that when the higher calcination temperature is applied, more severe operating conditions on the reduction process must also be applied, but catalyst sintering can appear when very severe reduction conditions are used.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Garcia1998a,

title = {Influence of catalyst weight/biomass flow rate ratio on gas production in the catalytic pyrolysis of pine sawdust at low temperatures},

author = {Lucía García and María L Salvador and Jesús Arauzo and Rafael Bilbao},

url = {https://pubs.acs.org/sharingguidelines},

doi = {10.1021/ie9801960},

issn = {08885885},

year  = {1998},

date = {1998-01-01},

journal = {Industrial and Engineering Chemistry Research},

volume = {37},

number = {10},

pages = {3812--3819},

publisher = {American Chemical Society},

abstract = {Pine sawdust catalytic pyrolysis has been studied in a fluidized bed at temperatures of 650 and 700 °C. The experimental work was carried out in a bench-scale plant based on Waterloo Fast Pyrolysis Process (WFPP) technology. The Ni-Al catalyst used was prepared by coprecipitation with a molar ratio 1:2 (Ni-Al) and calcined at 750 °C for 3 h. The catalyst was not reduced prior to the biomass reaction. The influence of the catalyst weight/biomass flow rate ratio (Wl mb) on the product distribution and on the quality of the gas product obtained was analyzed. An increase of the W/mb ratio increases the total gas yield and diminishes the liquid yield. When the W/mb ratio increases, H2 and CO yields increase while CO2, CH4, and C2 yields decrease. For W/mb ratios ≥ 0.4 h, no significant modifications are observed on the initial yields of different gases, and it is confirmed that under these conditions the initial gas composition is similar to that for thermodynamic equilibrium. For W/mb ratios < 0.4 h, a simple first-order kinetic equation has been suggested for H2 and CO formation. textcopyright 1998 American Chemical Society.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kifani-Sahban1997,

title = {A physical approach in the understanding of the phenomena accompanying the thermal treatment of lignin},

author = {F Kifani-Sahban and A Kifani and L Belkbir and A Zoulalian and Jesús Arauzo and T Cardero},

doi = {10.1016/s0040-6031(97)00115-9},

issn = {00406031},

year  = {1997},

date = {1997-09-01},

journal = {Thermochimica Acta},

volume = {298},

number = {1-2},

pages = {199--204},

publisher = {Elsevier},

abstract = {In this work, a mechanical approach is associated with the thermal behavior of lignin. Samples of lignin are submitted to a thermal treatment accomplished at different final temperatures of pyrolysis. The dimensional variations which occurred during the degradation of lignin are quantified by the Jacobian of the transformation. The increase of the Jacobian in the interval 180 to 260°C signifies the formation and the development of a plastic phase by crazing as is indicated by scanning electron microscope micrographs of lignin residues. The apparition and the evolution of the plastic phase are not a new fact in fracture mechanics, but the characterisation of this phase and the mechanics of its formation and its fracture allow us to explain some aspects until now unknown in the thermal decomposition of lignin. The importance of this work relies on the analogy made between the thermal behaviour of lignin and the mechanical behaviour of polymers. This analogy permits us to make some interpretations and, for the first time, to explain the weak weight loss and the exothermic effect of the thermal degradation of lignin. textcopyright 1997 Elsevier Science B.V.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Bilbao1997c,

title = {Gas formation in the thermal decomposition of large spherical wood particles},

author = {Rafael Bilbao and Jesús Arauzo and María Benita Murillo and María L Salvador},

doi = {10.1016/S0165-2370(97)00056-9},

issn = {01652370},

year  = {1997},

date = {1997-08-01},

journal = {Journal of Analytical and Applied Pyrolysis},

volume = {43},

number = {1},

pages = {27--39},

publisher = {Elsevier},

abstract = {Gas formation, weight loss and temperature profiles in the thermal decomposition of relatively large particles of pine wood have been studied. Experiments with spherical particles of different sizes (2, 3 and 4 cm in diameter) have been carried out at two heating rates of the system (5 and 12°C min-1). The existence of significant radial and angular profiles in the particles causes differences in the conversion and in the formation of gases. The experimental yields obtained for the majority gas, CO2, have been compared with the calculated yields using a model without adjustable parameters. An acceptable agreement has been achieved between the experimental and calculated results. textcopyright 1997 Elsevier Science B.V.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Bilbao1995,

title = {Kinetics and Modeling of Gas Formation in the Thermal Decomposition of Powdery Cellulose and Pine Sawdust},

author = {Rafael Bilbao and Jesús Arauzo and María L Salvador},

url = {https://pubs.acs.org/sharingguidelines},

doi = {10.1021/ie00042a010},

issn = {15205045},

year  = {1995},

date = {1995-03-01},

journal = {Industrial and Engineering Chemistry Research},

volume = {34},

number = {3},

pages = {786--793},

publisher = {American Chemical Society},

abstract = {The formation of different gases in the thermal decomposition of cellulose and pine sawdust has been studied. The kinetic constants of CO2 and H2 formation in cellulose decomposition have been determined from results obtained in isothermal experiments. These kinetic constants have been taken as representative of pine sawdust decomposition at T > 292 °C, and values for lower temperatures have been obtained from isothermal experiments performed with pine sawdust. For both materials, a simple model without adjustable parameters has been applied that allows us to calculate the local temperature, solid conversion, and yield of each gas. The results obtained in dynamic experiments with heating rates ranging between 2 and 53 °C/min have been compared with the theoretical results, and an acceptable agreement has been achieved. textcopyright 1995, American Chemical Society. All rights reserved.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}