Marco Antonio Sanchez Castillo

Autonomous University of San Luis Potosí | UASLP · CIACyT - Coordinación para la Innovación y Aplicación de la Ciencia y la Tecnología

El enfoque de la obra se orienta al apoyo de micro productores que realizan actividades agrícolas y agroindustriales en comunidades Tének de la región Huasteca en el estado de San Luis Potosí. La obra describe una serie de actividades adecuadas al perfil de los micro productores rurales para facilitarles y hacerles sea más eficaz el proceso de gest...

En esta obra se presenta una secuencia de acción que puede ser eficaz en forma, tiempo y costo, para respaldar el proceso de formalizar el establecimiento de SPR en diferentes sistemas productivos rurales. El propósito es que, de forma simple, los micro productores interesados puedan usar la obra como referencia o guía, para saber cuáles acciones y...

El propósito de esta obra es documentar la optimización y sistematización del proceso de elaboración artesanal de dulces de piloncillo con semillas, llevado a cabo en una planta piloto de alimentos, y sugerir una serie de lineamientos para la adecuada implementación de los procedimientos de producción mejorados en las comunidades rurales en la zona...

en esta obra se describe un modelo de capacitación en emprendimiento social desarrollado para jóvenes, mujeres y micro-productores de las comunidades piloncilleras Tenek de la Huasteca Potosina. El modelo de capacitación en emprendimiento tiene los siguientes elementos distintivos: a) un diagnóstico comunitario que identificó y validó los retos y b...

Correction for ‘Expanding plastics recycling technologies: chemical aspects, technology status and challenges’ by Houqian Li et al. , Green Chem. , 2022, 24 , 8899–9002, https://doi.org/10.1039/D2GC02588D.

This research focused on the evaluation of the Fe2O3/TiO2 composite and two industrial wastes, a kaolin (Clay-K) and a blast furnace sludge (BFS), as adsorbents and/or photocatalytic materials to enhance the removal of cyanide from aqueous solutions. Cyanide adsorption tests were conducted in the absence of light. In contrast, cyanide photodegradat...

This research is mainly focused on the evaluation of TiO2/Fe2O3 composite and two industrial types of waste (kaolin (Clay-K) and a blast furnace sludge (BFS)) as adsorbent materials of cyanide and as photocatalysts. First, adsorption tests were performed in the absence of light. During photodegradation experiments, the effect of the type of irradia...

Less than 10% of the plastics generated globally are recycled, while the rest are incinerated, accumulated in landfills, or leach into the environment. New technologies are emerging to chemically recycle waste plastics that are receiving tremendous interest from academia and industry. Chemists and chemical engineers need to understand the fundament...

Less than 10% of the plastics generated globally are recycled, while the rest are incinerated, accumulated in landfills, or leach into the environment. New technologies are emerging to chemically recycle waste plastics that are receiving tremendous interest from academia and industry. Chemists and chemical engineers need to understand the fundament...

Less than 10% of the plastics generated globally are recycled, while the rest are incinerated, accumulated in landfills, or leach into the environment. New technologies are emerging to chemically recycle...

Correction for ‘Expanding plastics recycling technologies: chemical aspects, technology status and challenges’ by Houqian Li et al. , Green Chem. , 2022, https://doi.org/10.1039/d2gc02588d.

Slags, sludges, and dust from steelmaking industries have been probed as adsorbents for Pb(II) removal from synthetic water solutions, and these residues have showed good potential in the treatment of industrial effluents contaminated with this heavy metal. Adsorption and precipitation of Pb(II) have been postulated as the main mechanisms to remove...

Plasma-based technology is an alternative to produce universal polymer coatings with the appropriate requirements of robustness and stability for antibacterial applications. Here, we proposed a sequential two-step alternative to synthesize antibacterial polymer coatings. A non-isothermal plasma reactor, operated at atmospheric pressure (Patm) and r...

We showed the feasibility to use blast furnace dust microspheres (BFDM), an industrial residue with magnetic properties, for the synthesis of silver nanoparticles (AgNP)/BFDM composites. A sol-gel Pechini modified method was used to synthesize AgNP/BFDM. AgNP formation was confirmed by SEM/EDS, which also showed a large Ag coverage on BFDM. Tempera...

In this work, blast furnace dust (BFD) obtained from a steel dust collector is used as low-cost adsorbent material for chromium removal from steel industrial plating wastewater. This study shows that BFD present physical and chemical characteristics, such as chemical composition, magnetic properties and particle size, suitable for application in ad...

Oxygenated surface sites on Activated Carbon (AC) exhibit low acid strength but are still useful to catalyze reactions of industrial interest. A series of AC-based acid catalysts was prepared by modifying a basic-character AC with an O2 plasma using a rotary dielectric barrier discharge reactor, to get further insight of the catalytic potential of...

Esta metodología tiene como objetivo desarrollar en los académicos, investigadores, estudiantes de posgrados y actores clave del ecosistema emprendedor de alto impacto: Conocimiento del contexto en el dónde se desarrollan las mejores prácticas y metodologías de emprendimiento a nivel nacional e internacional. Desarrollo de capacidades emprendedor...

Copper-palladium bimetallic catalysts supported on TiO2 were developed for the aqueous phase hydrodeoxygenation (HDO) of glycerol. Na-promoted bimetallic catalysts had higher activity than monometallic catalysts while maintaining high 1,2-propanediol (1,2-PDO) selectivity (76-93%) characteristic of Cu catalysts. The best results were obtained with...

The conversion of biomass and its derivatives is an alternative to replace the current fossil fuels. Various types of vegetable oils have been used as model systems for the synthesis of biofuels such as green gasoline and green diesel. This paper reviewed and analyzed the catalytic cracking of canola oil on a mesoporous acid catalyst (H-MCM41) at 4...

This work demonstrates that Jatropha cinerea (J. cinerea) seed oil has potential as a new, non-conventional, bio-energy resource. The physical and chemical properties of J. cinerea seeds, collected from its natural habit, were evaluated. The length-, diameter- and weight- of seeds were in the ranges of 8 to 12 mm, 7.5 to 11 mm, and 0.2 to 0.7 g, re...

In this work, the removal of cyanide from aqueous solutions was accomplished by using the synergetic effect of activated carbon and an oxidizing agent. A basic-character coconut shell activated carbon (CAC) was used; experiments were conducted in a semi-batch reactor, at 25 °C, initial pH of 11.5, and using cyanide solutions with initial concentrat...

This work demonstrates that Jatropha cinerea (J. cinerea) seed oil has potential as a new, non-conventional, bio-energy resource. The physical and chemical properties of J. cinerea seeds, collected from its natural habit, were evaluated. The length-, diameter- and weight- of seeds were in the ranges of 8 to 12 mm, 7.5 to 11 mm, and 0.2 to 0.7 g, re...

Resumen. El Estado de Sinaloa, México, a través del Consejo para el Desarrollo Económico de Sinaloa (CODESIN), impulsa una nueva visión de desarrollo basada en la innovación y orientada a fortalecer y generar en el estado, el capital humano, el conocimiento, la investigación, el desarrollo tecnológico, conectando estas capacidades con el sector pro...

Biodiesel is briefly defined as a renewable fuel derived from vegetable oils or animal fats. Similarly, the American Society of Testing and Materials (ASTM) defines biodiesel as monoalkyl long-chain fatty acids esters derived from fatty renewable inputs, such as vegetable oils or animal fats. The term “bio” refers to its origin from biomass related...

Sulfide minerals are one of the most important sources of metal values. On the other hand, some sulfides such as pyrite are considered as one of the major impurities in solid fossil fuels such as coal. Oxidation of these sulfides has been one route to obtain base metals and to remove sulfur by leaching. This work summarizes the results obtained reg...

The cyanide is the main process for the extraction of gold from its ores. This process produces rich cyanide solutions containing gold and silver, and waste cyanide solutions with different metal compounds such as copper, zinc and iron. These elements or compounds can be extracted in the form of high-value compounds as nanoparticles. This work pres...

Several attempts have been made to optimize the process and reduce operating costs of the acid leaching of low grade sulphide copper ores. In this study, we conducted acidic leaching of low-grade chalcopyrite by using ferric ion and ozone as oxidants, at 25°C. In particular, we used a Taguchi L9 experimental design (four factors, three levels) to d...

Introducción. La producción de proteínas recombinantes a escala económicamente atractiva es un área de gran auge debido a sus aplicaciones en tratamiento médicos. La síntesis de estos productos de alto valor agregado requiere la optimización de condiciones y sistemas de reacción que favorezcan la máxima calidad del producto. Por esta razón, es nece...

The effect of adding Sn to Pt/CeO2–Al2O3 and Pt/Al2O3 catalysts was studied with X-ray photoelectron spectroscopy (XPS), 119Sn Mössbauer spectroscopy, and adsorption microcalorimetry of CO at room temperature. Catalysts were reduced in situ at 473 (non-SMSI state) and 773 K (SMSI state). 119Sn Mössbauer and XPS results indicated that the presence o...

A microkinetic model for methanol decomposition on platinum is presented. The model incorporates competitive decomposition pathways, beginning with both O–H and C–H bond scission in methanol, and uses results from density functional theory (DFT) calculations [Greeley and Mavrikakis, J. Am. Chem. Soc. 124 (2002) 7193, Greeley and Mavrikakis, J. Am....

Reaction kinetics studies were conducted for the conversions of ethanol and acetic acid over silica-supported Pt and Pt/Sn catalysts at temperatures from 500 to 600 K. Addition of Sn to Pt catalysts inhibits the decomposition of ethanol to CO, CH4, and C2H6, such that PtSn-based catalysts are active for dehydrogenation of ethanol to acetaldehyde. F...

A FCC unit is the main fuel processing refinery unit that produces olefins. With the addition of rare earth (RE) cations on Y zeolite, refiners manipulate the product mix during cracking and change the olefin-paraffin selectivity. Fundamentally, the rate of the hydride transfer-beta-scission cycle determines to a large extent the olefinicity of the...

Membranen aus Gold-Nanoröhren in Polycarbonatfilmen wurden zur Untersuchung katalytischer Reaktionen an Gasflüssig-Grenzflächen verwendet, die zeigen, dass die katalytischen Eigenschaften von Gold bei der Oxidation von CO mit O2 durch Wasser verbessert und durch Erhöhung des pH-Werts der Lösung optimiert werden. Die Membran ist zwischen weiteren Me...

Reaction kinetics data were collected for the conversion of isobutane over H-mordenite and β-zeolite, under conditions where reaction was initiated primarily by addition of isobutylene to the feed and where stable catalyst performance was achieved. We successfully extended our kinetic model, previously developed to describe the conversion of isobut...

Thesis (Ph. D.)--University of Wisconsin--Madison, 2003. Includes bibliographical references (p. 185-196). Photocopy.

It is shown that it is possible to produce 1,2-propanediol (a high demand commodity chemical) in high yields via the vapor-phase catalytic hydrogenation of biomass-derived lactic acid. This catalytic process provides an environment-friendly route for the production of 1,2-propanediol from renewable resources. Reaction kinetics measurements were con...

Reaction kinetics analyses were conducted for isobutane and 2-methylhexane conversion over USY zeolite (both calcined and steam-treated) at 773 K, where reaction is initiated by activation of the reactant paraffin. These analyses indicate that increasing the severity of catalyst steam treatment leads to an increase in the composite activation barri...

Reaction kinetics studies were conducted for isobutane conversion over a USY zeolite catalyst at a total pressure of 1 atm and for temperatures of 523 and 573 K. The catalyst is inactive for isobutane conversion in the absence of feed olefins at these temperatures; however, a stable catalyst performance was achieved for levels of isobutylene in the...

Microcalorimetric measurements of the adsorption of H2 and C2H4 were carried out at 300 K on a Pt–Zn/X-zeolite catalyst (Pt?:?Zn atomic ratio equal to 1?:?1). The initial heats of H2 and C2H4 adsorption were equal to 75 and 122 kJ/mol, respectively, and these values are weaker than the values of 90 and 155 kJ/mol typically observed for supported Pt...

Se investigó el intercambio de algunos iones metálicos en solución acuosa sobre cuatro muestras de minerales zeolíticos, que se designaron como AK, Crem, TAM-1 y TAM-2. Estas muestras están constituidas principalmente por la zeolita natural que se conoce como clinoptilolita. Primeramente, se investigó el intercambio de los iones As(III), Fe(II), Hg...

The ionic exchange of some metallic ions in aqueous solutions onto four zeolitic mineral samples which were named as AK, Crem, TAM-1 and TAM-2 was investigated. These samples are constituted mainly of natural zeolite known as clinoptilolite. Firstly, the ion exchange of As(III), Fe(II), Hg(II) and Cr(VI) was investigated and it was found that these...

Microcalorimetric, infrared spectroscopic, and reaction kinetics measurements are combined with quantum-chemical calculations based on density-functional theory to investigate the selective reduction of acetic acid, methyl acetate, and ethyl acetate over silica-supported copper catalysts. Experimental values for initial heats of dissociative adsorp...

The adsorption isotherms of fluoride from an aqueous solution on plain and aluminum-impregnated activated carbons were measured in this study. The impregnated carbon was prepared by impregnation with an aluminum nitrate solution at a fixed pH, followed by calcination under nitrogen at temperatures above 300°C. The adsorption of fluoride on impregna...

Se presenta la metodología que condujo a la definición del perfil del egresado de ingeniería química de la UASLP. Este procedimiento es el resultado de un análisis de las necesidades locales y nacionales planteadas por profesionales del área con experiencia industrial, docente y de investigación, así como de los avances en desarrollo curricuiar.

An yttria stabilized zirconia (YSZ) membrane reactor system was applied to enhance the direct thermal decomposition of CO2 at high temperature. The decomposition rate of CO2 and the permeation rate of oxygen through the membrane were measured and their equations were established. The reaction itself and the reactions involved in the separation proc...

En este estudio se presenta un nuevo modelo cinético para la hidrólisis enzimática del almidón en solución por medio de glucoamilasa. Se investÍgó el efecto de las concentraciones iniciales de almidón y glucosa y pH en las constantes cinéticas del modelo. que se evaluaron por el método de Marquardt. El modelo cinético correlacionó los datos experim...