Showing papers in "Chemical Engineering Journal in 2005"

TL;DR: The main aspects of preparation technologies for the manufacture of environmental monolithic catalysts have been reviewed on the basis of the patent literature, the authors own experience in their laboratories, and the current open literature as discussed by the authors.

TL;DR: In this paper, the effects of ultrasonic pretreatment on waste-activated sludge were studied and the relationship between biogas production and sludge fractions has been examined, showing that for specific energy input lower than 3000 kJ/kg of total solids, biogAS production linked to the particulate fraction of sludge was constant, even if the solids concentration decreased.

TL;DR: In this article, the effect of base solutions on the yield of oil products and composition of oils obtained at different stages were discussed in detail, based on the conversion and yield of liquid products.

TL;DR: In this paper, the authors applied a 2 4 full-factorial central composite design (CCD) and response surface methodology to optimize four independent parameters, viz UV light intensity, the concentration of TiO 2, initial pH, and stirring speed, in the photocatalytic degradation process of the dye Reactive Red 239.

TL;DR: In this paper, the authors used CeO2 as an additive promoter on Ni/Al2O3 to improve dry reforming activity for H2 and CO productions at solid oxide fuel cell (SOFC) operating temperature (800-900°C).

TL;DR: In this paper, the activated carbon was prepared by zinc chloride activation under four different activation atmospheres, to develop carbons with well-developed porosity and showed substantial capability to adsorb phenol from aqueous solutions.

TL;DR: In this article, the effect of variables such as pH and H 2 O 2 concentration on the degradation of Direct Red 80 in a fixed bed photocatalytic reactor was investigated.

TL;DR: In this article, the effect of initial BBF concentration, temperature, pH, and ionic strength on the adsorption of brilliant blue FCF from aqueous solution was investigated.

TL;DR: Chitosan showed the best removal compared to the other adsorbents for all the parameters studied as discussed by the authors, and it could successfully remove 99% of residual oil and minimize the suspended solid content to a value of 25 mg/l.

TL;DR: In this article, a thermodynamic model is developed to estimate equilibrium composition for supercritical water gasification (SCWG) of biomass, which is based on Peng-Robinson EoS formulations and direct Gibbs free energy minimization.

TL;DR: In this paper, a hybrid adsorbent that was prepared by pyrolysing a mixture of carbon and fly ash in 1:1 ratio was successfully employed for experimental design and analysis.

TL;DR: In this paper, a non-thermal gliding arc system was designed to convert gasoline into hydrogen-rich gas in autothermal or steam reforming conditions for car application, and the experimental results were compared to the performances of other nonthermal plasma reformers.

TL;DR: Turbinaria ornata, a brown marine alga, was tested for its ability to remove copper(II) from aqueous solution as discussed by the authors, and the experiments were conducted to study the effect of important design parameters such as bed height and flow rate.

TL;DR: The use of membranes in gas separations has grown at a very rapid pace in recent times as discussed by the authors, and one particularly interesting application of gas separation with membranes is the removal of dilute heavy organics from light gas streams such as removing solvents from the exhaust of different process industries.

TL;DR: Biofilter and biotrickling filter models have been useful for research purposes, but have not yet progressed to the point of being reliable and generally accepted tools for design.

TL;DR: In this article, the effects of silver and platinum metals on the photocatalytic degradation of endocrine disrupting chemicals (EDCs) in water over TiO2 (Degussa P25) were investigated.

TL;DR: In recent years, biological techniques have been applied more frequently to control these emissions, because they eliminate many of the drawbacks of classical physical-chemical techniques as discussed by the authors, and a significant body of knowledge and experience has been generated on biological waste gas purification.

TL;DR: In this paper, cellulose and sawdust were gasified in supercritical water to produce hydrogen-rich gas in a large-scale use of biomass for energy and in hydrogen are motivated largely by global environmental issues.

TL;DR: Zamaro, Juan Manuel, and Parera as mentioned in this paper presented the work of Instituto de Investigaciones en Catalisis y Petroquimica "Ing. Jose Miguel Pareara".

TL;DR: A phenomenological kinetic model for the pyrolysis at low heating rates of lignin activated with phosphoric acid was developed in this paper, based on thermogravimetry (TG) and DTG data.

TL;DR: In this paper, the effects of agitation speed, initial dye concentration and solution temperature on batch sorption kinetics of methylene blue by perlite have been studied in terms of pseudo-first-order, pseudo-second-order and intra-particle diffusion models.

TL;DR: In this paper, a study for leaching kinetics of sphalerite concentrate in FeCl3-HCl solution was presented, where the shrinking core model was applied to the results of experiments investigating the effects of stirrer speed of 200-600-rpm, ferric ion concentration, solid/liquid ratio, and particle size on zinc dissolution rate.

TL;DR: In this paper, the photocatalytic degradation of E. coli in water by various catalysts was investigated in a batch spiral reactor, where commercial Degussa P25 (P25) was found to be the most effective catalyst, followed by the HPC and the MPC.

TL;DR: A dynamic model to describe ammonia removal in a gas-phase biofilter was developed and was capable of predicting the outlet ammonia gas concentrations as well as reproducing satisfactorily the gaseous ammonia concentration profile with time under FA inhibition and under non-inhibitory conditions.

TL;DR: In this paper, a two-dimensional model of catalytic fixed bed reformer is developed with a system of partial differential equations describing the conservations for mass and energy using kinetic data determined from the current experiment.

TL;DR: An important reduction of ammonia removal was observed when the waste gas contained high NH 3 concentration, which corresponded with the case of animal by-products composting.

TL;DR: In this paper, two filter beds, one composed of inorganic material and the other of mature compost, have been tested for their comparative performance in the biofiltration of methane, and the main aim of these tests was to measure the importance of nutrient nitrogen concentration when provided to the bacteria in the form of nitrate ions.

TL;DR: In this article, the effect of surface oxygen groups of activated carbon (AC) on the adsorption of Cr (VI) ion was investigated, and the results showed that the surface oxygen group was more effective for the chemically treated ACs.

TL;DR: In this article, the performance of the Pd/Fe 3 O 4 nanoparticles in Heck reaction was investigated and the results showed that Pd 0 atom produced after the first reduction is bound to APTS-coated Fe 3 O4 nanoparticles by the coordination of NH 2 ligand with pd 0 and then grows into bigger clusters with the increase in the reduction times.

TL;DR: In this paper, the pyrolysis of 10 sewage sludges (5 anaerobic and 5 aerobic) from the Madrid region (Spain) was carried out at 450°C during 1/h in a vertical glass-furnace.