Concept

Ze-gen

Résumé

Ze-gen, Inc. was a renewable energy company developing advanced gasification technology to convert waste into synthesis gas. Founded in 2004, Ze-gen was a venture-backed company based in Boston, Massachusetts. The company aimed to develop innovative technological solutions to reduce landfills and find beneficial use for waste material by converting waste to energy and nutrients, using advanced gasification. Today Ze-gen appears to be defunct, and the company website was taken down in 2014. The liquid metal gasification process begins with feed material entering the gasifier through a gas-tight airlock into a refractory-lined vessel containing liquid copper, which is held at about 2200 °F. Material entering into the liquid metal gasifier undergoes a series of thermo-chemical reactions, which are auto-thermal under stable operating conditions. Initially, pyrolysis occurs and volatiles are driven into the headspace of the gasifier. In the subsequent gasification reaction, hydrogen (H2) and carbon monoxide (CO) are favored as final products, along with carbon dioxide () and a small amount of methane (CH4). This product gas is called synthesis gas, also known as syngas. The inorganic constituents, which are generally lighter than liquid metal, form a slag layer on top of the liquid metal bath and are removed as a vitrified non-leachable slag byproduct. The slag is either recycled or disposed of as an industrial by-product. While some metals and oxides present in the feedstock accumulate in the liquid metal bath, others will exit as vapor and are captured in the gas cleanup process. The syngas produced can be used for several different end-use applications including: steam generation, electricity production, making industrial hydrogen gas, as chemical building blocks for synthetic diesel or ethanol, synthetic natural gas, methanol, or as a chemical feedstock into a variety of industrial processes. Ze-gen's demonstration facility is colocated with a processing facility owned by New Bedford Waste Services, LLC in New Bedford, Massachusetts.

Source officielle

https://en.wikipedia.org/wiki/Ze-gen

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