Showing papers by "Luis A. Rios published in 2018"
TL;DR: In this article, the authors evaluated the effects of various conditions on ethanol yield and potential profit in liquid hot water pretreatment on empty palm fruit bunch (EPFB) at 160-210°C, residence time of 0-60 min and solid loadings of 5-25% wt.
32 citations
TL;DR: In this paper, the effects of the catalyst type (Ni-Mo and Co-Mo) and of the variables temperature (300-370°C), pressure (5.0-9.0 MPa), and time (3-6
21 citations
9 citations
01 Jan 2018
TL;DR: In this article, the authors investigated the applicability of coffee residue as a lignocellulosic absorbent material for the removal of methyl orange dye from aqueous solutions by batch adsorption experiments.
Abstract: espanolSe investigo el residuo de cafe tostado y molido como un material lignocelulosico absorbente capaz de remover el colorante naranja de metilo a partir de disoluciones acuosas mediante experimentos de adsorcion por lotes. Se estudiaron los efectos de parametros experimentales en el comportamiento de la adsorcion, tales como la concentracion inicial del colorante, la dosis del adsorbente, el pH inicial y la temperatura. Se observo una mejor adsorcion del colorante a pH acido, baja temperatura y con una dosis de adsorbente de 6 g/L. Se encontro una cinetica de pseudo-segundo orden segun el modelo cinetico de Lagergren. Se calculo una capacidad maxima de adsorcion de 1,3 mg de naranja de metilo por cada gramo de adsorbente por medio de un ajuste al modelo de Langmuir. Se encontro que la adsorcion del naranja de metilo en el adsorbente analizado presenta una naturaleza exotermica. Se comprobo que el residuo de cafe tostado y molido es viable para el tratamiento primario de aguas residuales contaminadas con compuestos de tipo azoico. EnglishResidue of roast and ground coffee as a lignocellulosic adsorbent material was investigated, in the removal of methyl orange dye from aqueous solutions by batch adsorption experiments. The effects of experimental parameters such as initial dye concentration, biosorbent dose, initial pH and temperature on dye biosorption were studied. The adsorption amount of methyl orange decreased with increasing pH and temperature. The experimental data fitted very well to the pseudo second-order kinetic Lagergren model. A maximum adsorption capacity of 1,3 mg of methyl orange per gram of biosorbent through an adjustment to the Langmuir model was calculated. It was found that the biosorption of methyl orange in the analyzed biosorbent is of exothermic nature. It was found that the roasted and ground coffee residue is viable for the primary treatment of wastewater contaminated with azoic compounds.
1 citations