Se você acha que já viu todos os tipos de Tabela Periódica que existem por aí…

Acesse o site http://www.dayah.com/periodic/ e conheça uma Tabela muito didática e, acreditem, divertida.

Além de uma divisão bastante clara dos metais, ametais, halogênios, gases nobres, etc., e das informações básicas sobre número atômico e massa atômica, essa tabela oferece:

- Ponto de fusão

- Ponto de ebulição

- Estado físico a 273K

- Condutividade

- Abundância

- Distribuição eletrônica

- Números quânticos

- Orbitais atômicos

- Isótopos

- Decaimento

- e muito mais!!!

Pra quem gosta de Química é um prato cheio!

Esse site faz parte da coleção de links sugeridos pelo Chemkeys. Para acessá-los,  basta clicar em links na barra superior do site www.chemkeys.com.

Confira!

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No Brasil o uso de biocombustíveis tem aumentado ao longo das últimas décadas e sua participação na matriz energética nacional deve ser ainda mais relevante no futuro  póximo. O etanol e o biodiesel são os principais tipos de biocombustível utilizados no setor de transportes. O Brasil foi responsável por 41% da produção mundial de etanol em 2006. No que diz respeito a automóveis, em 2007 a participação de veículos Flex no mercado foi de 65%. O Governo brasileiro implementou em 2005 o Programa Nacional de Biodiesel. Em 2008,a mistura de 2% no Diesel passa a ser obrigatória, representando 840 milhões de litros por ano.

CNEN – Comissão Nacional de Energia Nuclear

2008 – Boletim de Energia – Acesso livre

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Biomass is by many considered as the only alternative to phase-out the usage of fossil fuels such as natural gas and oil especially for the transportation sector where alternative solutions, such as hydrogen fuel cells and batteries, are not yet fully developed. Thermal gasification or other methods such as pyrolysis of the biomass must be applied in order to produce an intermediate product suitable for further upgrading to either gaseous or liquid products. This thesis will evaluate the possibilities of producing, substitute natural gas, (SNG) from biomass gasification by using computer simulation.

CNEN – Comissão Nacional de Energia Nuclear

2008 – Boletim de Energia – Acesso livre

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With enactment of the Energy Independence and Security Act of 2007 (H.R. 6) in December, we are embarking on a new energy policy path. This historic legislation couples increased vehicle efficiency and greater renewable fuel use, steps that can have an immediate impact toward securing a more sustainable energy and environmental future. The law increases the Renewable Fuels Standard (RFS) to 36 billion gallons of annual renewable fuel use by 2022. And by requiring that nearly 60 percent of the new RFS be met by advanced biofuels, including cellulosic ethanol, it paves the way for commercialization of these vital next generation ethanol technologies. Clearly, this legislation will change the way we fuel our country. Importantly, it’s also changing our environmental footprint from transportation fuels. The increased production and use of renewable fuels, particularly from cellulose feedstocks, will dramatically alter our environmental landscape, utilizing sustainable supplies of biomass while reducing fossil fuel use and harmful greenhouse gas emissions. 2007 will also be remembered for witnessing the ground-breaking on the first commercial-scale cellulosic ethanol biorefinery in the U.S. Range Fuels will utilize leftover wood residues from timber harvesting to produce ethanol at its facility near Soperton, Georgia. Others will soon follow, utilizing a variety of technologies and feedstocks. At the same time, existing biorefineries continue to lead with technological innovations that are improving plant efficiencies while reducing energy consumption. As you read on, you will find valuable information on the U.S. ethanol industry, including historical data and current statistics on ethanol and its co-products. 2008 promises to be an exciting and challenging year. As always, the U.S. ethanol industry is dedicated to working with all of our ustomers, suppliers and carriers to meet the energy needs of a growing marketplace while ensuring a more sustainable energy future for all Americans.

CNEN – Comissão Nacional de Energia Nuclear

2008 – Boletim de Energia – Acesso livre