Conversion of low density polyethylene into fuel through co-processing with vacuum gas oil in a fluid catalytic cracking riser reactor

In this work, mixtures of vacuum gas oil and low density polyethylene, a major component of common industrial and consumer household plastics, were pyrolytically co-processed in a fluid catalytic cracking (FCC) riser reactor as a viable alternative for the energy and petrochemical revalorisation of plastic wastes into valuable petrochemical feedstocks and fuel within an existing industrial technology. Using equilibrium FCC catalyst, the oil–polymer blends were catalytically cracked at different processing conditions of temperatures between 773 K and 973 K and catalyst feed ratios of 5:1, 7:1 and 10:1. The influence of each of these processing parameters on the cracking gas and liquid yield patterns were studied and presented. Further analysed and presented are the different compositional distributions of the obtained liquids and gaseous products. The analysis of the results obtained revealed that with very little modifications to existing process superstructure, yields and compositional distributions of products from the fluid catalytic cracking of the oil–polymer blend in many cases were very similar to those of the processed oil feedstock, bringing to manifest the viability of the feedstock co-processing without significant detriments to FCC product yields and quality.

El plano geométrico de Crevillent: un pla urbanístic de sanejament i reforma interior de José Guardiola Picó el 1877

El present article analitza i situa en el context l’expedient urbanístic sobre la reforma interior del nucli urbà de Crevillent que l’ajuntament d’aquesta ciutat intentà dur a terme en l’últim quart del segle xix i que, en part, constitueix el plànol geomètric parcial d’aquesta vila. Es tracta d’un expedient municipal en què se succeeixen les actes del consistori per a la seua tramitació administrativa (entre 1876 i 1878) i en què s’intercala el projecte urbà de reforma interior, que consta de tres documents (memòria i dos planols: geomètric i de perfils), firmats el 12 de gener de 1877 per l’arquitecte José Guardiola y Picó (1836-1909), i que es tanca amb un plànol solt del 9 de gener de 1884 de firma no molt llegible.

Ethanol dehydration via azeotropic distillation with gasoline fraction mixtures as entrainers: A pilot-scale study with industrially produced bioethanol and naphta

Various hydrocarbons (n-hexane, cyclohexane, toluene, isooctane) and mixtures of them (binary, ternary or quaternary), as well as two different types of industrially produced naphtha (one obtained by direct distillation and the other from a catalytic cracking process), have been tested as candidate entrainers to dehydrate ethanol. The tests were carried out in an azeotropic distillation column on a semi pilot plant. The results show that it is possible to dehydrate bioethanol using naphtha as entrainer, obtaining as a result a fuel blend with negligible water content and ready for immediate use in motor vehicles.

Semantic localization in the PCL library

The semantic localization problem in robotics consists in determining the place where a robot is located by means of semantic categories. The problem is usually addressed as a supervised classification process, where input data correspond to robot perceptions while classes to semantic categories, like kitchen or corridor. In this paper we propose a framework, implemented in the PCL library, which provides a set of valuable tools to easily develop and evaluate semantic localization systems. The implementation includes the generation of 3D global descriptors following a Bag-of-Words approach. This allows the generation of fixed-dimensionality descriptors from any type of keypoint detector and feature extractor combinations. The framework has been designed, structured and implemented to be easily extended with different keypoint detectors, feature extractors as well as classification models. The proposed framework has also been used to evaluate the performance of a set of already implemented descriptors, when used as input for a specific semantic localization system. The obtained results are discussed paying special attention to the internal parameters of the BoW descriptor generation process. Moreover, we also review the combination of some keypoint detectors with different 3D descriptor generation techniques.

The combined effect of plastics and food waste accelerates the thermal decomposition of refuse-derived fuels and fuel blends

Mechanical treatments such as shredding or extrusion are applied to municipal solid wastes (MSW) to produce refuse-derived fuels (RDF). In this way, a waste fraction (mainly composed by food waste) is removed and the quality of the fuel is improved. In this research, simultaneous thermal analysis (STA) was used to investigate how different mechanical treatments applied to MSW influence the composition and combustion behaviour of fuel blends produced by combining MSW or RDF with wood in different ratios. Shredding and screening resulted in a more efficient mechanical treatment than extrusion to reduce the chlorine content in a fuel, which would improve its quality. This study revealed that when plastics and food waste are combined in the fuel matrix, the thermal decomposition of the fuels are accelerated. The combination of MSW or RDF and woody materials in a fuel blend has a positive impact on its decomposition.

El Pla Valencià del Llibre i la Lectura. Accions recomanades

Informe-resum dels continguts del II Simposi sobre la lectura, el llibre, les biblioteques i l’escola. El Pla Valencià de Foment del Llibre i la Lectura (PVFLL): Línies d’acció. Descripció de les accions que cal realitzar per a la implantació del Pla Valencià de Foment de la Lectura i el Llibre, detecció de les necessitats informatives i els primers passos que cal seguir.

Milanés y Plácido, [pseud.] Réplica al Sr. Federico Milanés,

"Publicado en 'Cuba contemporánea'."

Nuovo codice scolastico vigente, leggi, decreti, regolamenti, circolari e programmi dal 1859 al 1909; raccolta commentata de' testi sull' amministrazione centrale e locale sull' insegnamento superiore, classico, tecnico, elementare e normale e sugli istituti complementari di cultura (antichità e belle arti, biblioteche, educazione fisica); con decisioni e pareri dei corpi consultivi e deliberanti amministrativi e giudiziari con cenni statistici e di legislazione sugli istituti di istruzione e di educazione del regno e con indici per materie, analitico-alfabetico e cronologico;

Mode of access: Internet.

La Dalmazia; cenni geografici e statistici, illustrati da 32 figure fuori testo con un atlante di 22 tavole a colori comprendenti 60 carte ...

Mode of access: Internet.

Sermones quadragesimales magistri Iacobi de Voragine ... : In quibus habe[n]tur duo sermones p[er] vnaquaq[ue] die ip[s]ius temporis quadragesimalis. Cu[m] speciali sermone de passione dominica. Et de pla[n]ctu intemerate Virginis ei[us] matris Marie

ICCU,

[Comparación entre los hospitales grandes y los pequeños] : Discurso leido ante el cláustro de la Universidad Central por ... Pablo Marqués y Pla en el solemne acto de recibir la investidura de doctor en Medicina y Cirujia.

Tesis doctoral Univ. Central, 1867.

Cenni statistici sull'interna amministrazione dell'Albergo de' Poveri in Genova formati sulle risultanze d'un quinquennio dal 1841 al 1845.

Mode of access: Internet.

Poésies complètes de Plácido : Gabriel de la Concepcion Valdès /

Mode of access: Internet.

Szerémi György, II. Lajos és János Királyok Házi Káplánja, emlékirata Magyarország romlásáról 1484-1583 /

Introductory essay in Hungarian; text of Epistola de perditione regni Hungarorum in Latin.