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Demo plant for high-yield biomass-to-gasoline process under construction

By Scott Jenkins |

Construction of a demonstration plant has begun for a biomass-to-gasoline process that boosts biomass conversion efficiency in producing bio-gasoline. The demonstration, to be located at the Hillsborough, N.J. headquarters of Primus Green Energy (www.primusge.com), is slated for completion in the middle of 2012. Primus recently announced the successful pilot-scale operation of its gasification and liquid-fuels-synthesis process (diagram), which converts pelletized biomass into hydrogen-rich synthesis gas (syngas), with ash as a byproduct. As feedstock, dry woodchip waste or miscanthus, a bioenergy crop that grows on marginal land at high biomass-per-acre rates, is used. The Primus gasifier uses superheated steam at elevated pressures to produce a raw syngas with low tar content. The syngas is further treated to yield a product with a H2-to-CO ratio of about 2.2, explains Primus vice president of business development George Boyajian. In addition, the process allows conversion efficiencies of 33%, Boyajian points out, a level close to the theoretical maximum. The process can generate 110 gal of gasoline per ton of dry biomass. After a scrubbing stage that removes CO2, the syngas passes into a catalytic liquid-fuel synthesis system, where…
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