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Maria Gonzalez-Diaz
CONACYT—Centro de Investigación Científica de Yucatán, A.C., Calle 43 No. 130, Chuburná de Hidalgo, Mérida 97200, Mexico

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Journal article
Published: 15 March 2021 in Sustainability
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This paper aims to evaluate the use of wood biomass in a gasifier integrated with a fuel cell system as a low carbon technology. Experimental information of the wood is provided by the literature. The syngas is purified by using pressure swing adsorption (PSA) in order to obtain H2 with 99.99% purity. Using 132 kg/h of wood, it is possible to generate 10.57 kg/h of H2 that is used in a tubular solid oxide fuel cell (TSOFC). Then, the TSOFC generates 197.92 kW. The heat generated in the fuel cell produces 60 kg/h of steam that is needed in the gasifier. The net efficiency of the integrated system considering only the electric power generated in the TSOFC is 27.2%, which is lower than a gas turbine with the same capacity where the efficiency is around 33.1%. It is concluded that there is great potential for cogeneration with low carbon emission by using wood biomass in rural areas of developing countries e.g., with a carbon intensity of 98.35 kgCO2/MWh when compared with those of natural gas combined cycle (NGCC) without and with CO2 capture i.e., 331 kgCO2/MWh and 40 kgCO2/MWh, respectively. This is an alternative technology for places where biomass is abundant and where it is difficult to get electricity from the grid due to limits in geographical location.

ACS Style

Abigail Gonzalez-Diaz; Juan Sánchez Ladrón de Guevara; Long Jiang; Maria Gonzalez-Diaz; Pablo Díaz-Herrera; Carolina Font-Palma. Techno-Environmental Analysis of the Use of Green Hydrogen for Cogeneration from the Gasification of Wood and Fuel Cell. Sustainability 2021, 13, 3232 .

AMA Style

Abigail Gonzalez-Diaz, Juan Sánchez Ladrón de Guevara, Long Jiang, Maria Gonzalez-Diaz, Pablo Díaz-Herrera, Carolina Font-Palma. Techno-Environmental Analysis of the Use of Green Hydrogen for Cogeneration from the Gasification of Wood and Fuel Cell. Sustainability. 2021; 13 (6):3232.

Chicago/Turabian Style

Abigail Gonzalez-Diaz; Juan Sánchez Ladrón de Guevara; Long Jiang; Maria Gonzalez-Diaz; Pablo Díaz-Herrera; Carolina Font-Palma. 2021. "Techno-Environmental Analysis of the Use of Green Hydrogen for Cogeneration from the Gasification of Wood and Fuel Cell." Sustainability 13, no. 6: 3232.

Journal article
Published: 27 July 2020 in Polymers
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The first example of quasiliving radical polymerization and copolymerization of 2-acrylamido-2-methylpropane sulfonic acid (AMPS) without previous protection of its strong acid groups catalyzed by [Ru(o-C6H4-2-py)(phen)(MeCN)2]PF6 complex is reported. Nuclear magnetic resonance (RMN) and gel permeation chromatography (GPC) confirmed the diblock structure of the sulfonated copolymers. The poly(2-acryloamido-2-methylpropanesulfonic acid)-b-poly(methyl methacrylate) (PAMPS-b-PMMA) and poly(2-acryloamido-2-methylpropanesulfonic acid)-b-poly(2-hydroxyethylmethacrylate) (PAMPS-b-PHEMA) copolymers obtained are highly soluble in organic solvents and present good film-forming ability. The ion exchange capacity (IEC) of the copolymer membranes is reported. PAMPS-b-PHEMA presents the highest IEC value (3.35 mmol H+/g), but previous crosslinking of the membrane was necessary to prevent it from dissolving in aqueous solution. PAMPS-b-PMMA exhibited IEC values in the range of 0.58–1.21 mmol H+/g and it was soluble in methanol and dichloromethane and insoluble in water. These results are well correlated with both the increase in molar composition of PAMPS and the second block included in the copolymer. Thus, the proper combination of PAMPS block copolymer with hydrophilic or hydrophobic monomers will allow fine-tuning of the physical properties of the materials and may lead to many potential applications, such as polyelectrolyte membrane fuel cells or catalytic membranes for biodiesel production.

ACS Style

Vanessa Martínez-Cornejo; Joaquin Velázquez-Roblero; Veronica Rosiles-González; Monica Correa-Duran; Alejandro Avila-Ortega; Emanuel Hernández-Núñez; Ronan Le Lagadec; Maria Ortencia González-Díaz. Synthesis of Poly(2-Acrylamido-2-Methylpropane Sulfonic Acid) and its Block Copolymers with Methyl Methacrylate and 2-Hydroxyethyl Methacrylate by Quasiliving Radical Polymerization Catalyzed by a Cyclometalated Ruthenium(II) Complex. Polymers 2020, 12, 1663 .

AMA Style

Vanessa Martínez-Cornejo, Joaquin Velázquez-Roblero, Veronica Rosiles-González, Monica Correa-Duran, Alejandro Avila-Ortega, Emanuel Hernández-Núñez, Ronan Le Lagadec, Maria Ortencia González-Díaz. Synthesis of Poly(2-Acrylamido-2-Methylpropane Sulfonic Acid) and its Block Copolymers with Methyl Methacrylate and 2-Hydroxyethyl Methacrylate by Quasiliving Radical Polymerization Catalyzed by a Cyclometalated Ruthenium(II) Complex. Polymers. 2020; 12 (8):1663.

Chicago/Turabian Style

Vanessa Martínez-Cornejo; Joaquin Velázquez-Roblero; Veronica Rosiles-González; Monica Correa-Duran; Alejandro Avila-Ortega; Emanuel Hernández-Núñez; Ronan Le Lagadec; Maria Ortencia González-Díaz. 2020. "Synthesis of Poly(2-Acrylamido-2-Methylpropane Sulfonic Acid) and its Block Copolymers with Methyl Methacrylate and 2-Hydroxyethyl Methacrylate by Quasiliving Radical Polymerization Catalyzed by a Cyclometalated Ruthenium(II) Complex." Polymers 12, no. 8: 1663.

Journal article
Published: 08 April 2020 in Journal of Membrane Science
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Three novel fluorinated polymers with ether-bond-free aryl backbones were obtained by one-pot, metal-free, room temperature superacid catalyzed non-stoichiometric step polymerization of 1,1,1-trifluoromethyl acetone with carbazole (CBZ), fluorene (FLN) and 9,9-dimethylfluorene (DFL). 1H and 13C NMR analyses of the polymers revealed their linear structure and high regioselectivity of the polymer forming reaction. The polymers also possess high thermostability with decomposition temperature up to 387 °C for CBZ and up to 530 °C for FLN and DFL as well as reasonable mechanical properties. The gas transport properties of six pure gases and binary gas mixture CO2/CH4 (10/90 mol%) are reported. These polymers present a good combination of permeability and selectivity up to 10 bar at 35 °C for CO2/CH4 mixed-gas feed. DFL exhibits the best pure-gas permeability and selectivity (PCO2 = 78.0, PH2 = 151.5, CO2/CH4 = 22.3 and H2/CH4 = 43.3) and mixed-gas permeability and selectivity CO2/CH4 (PCO2 = 71.3, CO2/CH4 = 23.7) at 35 °C and 2 bar with a slight decrease in selectivity at 10 bar. The highest permselectivity is obtained for FLN (CO2/CH4 = 36.7 and H2/CH4 = 88.4) with a separation performance close to the 2008 upper bound trade off.

ACS Style

Maria Ortencia González-Díaz; Enoc Cetina-Mancilla; Rita Sulub-Sulub; Angel Montes-Luna; Lilian Irais Olvera; Mikhail G. Zolotukhin; Jorge Cárdenas; Manuel Aguilar-Vega. Novel fluorinated aromatic polymers with ether-bond-free aryl backbones for pure and mixed gas separation. Journal of Membrane Science 2020, 606, 118114 .

AMA Style

Maria Ortencia González-Díaz, Enoc Cetina-Mancilla, Rita Sulub-Sulub, Angel Montes-Luna, Lilian Irais Olvera, Mikhail G. Zolotukhin, Jorge Cárdenas, Manuel Aguilar-Vega. Novel fluorinated aromatic polymers with ether-bond-free aryl backbones for pure and mixed gas separation. Journal of Membrane Science. 2020; 606 ():118114.

Chicago/Turabian Style

Maria Ortencia González-Díaz; Enoc Cetina-Mancilla; Rita Sulub-Sulub; Angel Montes-Luna; Lilian Irais Olvera; Mikhail G. Zolotukhin; Jorge Cárdenas; Manuel Aguilar-Vega. 2020. "Novel fluorinated aromatic polymers with ether-bond-free aryl backbones for pure and mixed gas separation." Journal of Membrane Science 606, no. : 118114.

Journal article
Published: 04 April 2017 in Molecules
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Parasitic diseases are a public health problem affecting millions of people worldwide. One of the scaffolds used in several drugs for the treatment of parasitic diseases is the benzimidazole moiety, a heterocyclic aromatic compound. This compound is a crucial pharmacophore group and is considered a privileged structure in medicinal chemistry. In this study, the benzimidazole core served as a model for the synthesis of a series of 2-(2-amino-5(6)-nitro-1H-benzimidazol-1-yl)-N-arylacetamides 1–8 as benznidazole analogues. The in silico pharmacological results calculated with PASS platform exhibited chemical structures highly similar to known antiprotozoal drugs. Compounds 1–8 when evaluated in silico for acute toxicity by oral dosing, were less toxic than benznidazole. The synthesis of compounds 1–8 were carried out through reaction of 5(6)-nitro-1H-benzimidazol-2-amine (12) with 2-chlroactemides 10a–h, in the presence of K2CO3 and acetonitrile as solvent, showing an inseparable mixture of two regioisomers with the -NO2 group in position 5 or 6 with chemical yields of 60 to 94%. The prediction of the NMR spectra of molecule 1 coincided with the experimental chemical displacements of the regioisomers. Comparisons between the NMR prediction and the experimental data revealed that the regioisomer endo-1,6-NO2 predominated in the reaction. The in vitro antiparasitic activity of these compounds on intestinal unicellular parasites (Giardia intestinalis and Entamoeba histolytica) and a urogenital tract parasite (Trichomonas vaginalis) were tested. Compound 7 showed an IC50 of 3.95 μM and was 7 time more active against G. intestinalis than benznidazole. Compounds 7 and 8 showed 4 times more activity against T. vaginalis compared with benznidazole.

ACS Style

Emanuel Hernández-Núñez; Hugo Tlahuext; Rosa Moo-Puc; Diego Moreno; María Ortencia González-Díaz; Gabriel Navarrete Vázquez. Design, Synthesis and Biological Evaluation of 2-(2-Amino-5(6)-nitro-1H-benzimidazol-1-yl)-N-arylacetamides as Antiprotozoal Agents. Molecules 2017, 22, 579 .

AMA Style

Emanuel Hernández-Núñez, Hugo Tlahuext, Rosa Moo-Puc, Diego Moreno, María Ortencia González-Díaz, Gabriel Navarrete Vázquez. Design, Synthesis and Biological Evaluation of 2-(2-Amino-5(6)-nitro-1H-benzimidazol-1-yl)-N-arylacetamides as Antiprotozoal Agents. Molecules. 2017; 22 (4):579.

Chicago/Turabian Style

Emanuel Hernández-Núñez; Hugo Tlahuext; Rosa Moo-Puc; Diego Moreno; María Ortencia González-Díaz; Gabriel Navarrete Vázquez. 2017. "Design, Synthesis and Biological Evaluation of 2-(2-Amino-5(6)-nitro-1H-benzimidazol-1-yl)-N-arylacetamides as Antiprotozoal Agents." Molecules 22, no. 4: 579.