National Institute of Advanced Industrial Science and Technology

Incorporated Administrative Agency National Agriculture and Food Research Organization

Mitsubishi Hitachi Power Systems Environmental Solutions, Ltd.

Noriyuki Yamada

Hiroyuki Nakamura

Minoru Genta

Ryosuke Uehara

Kinya Fujita

Masaya Miyazaki

Hideaki Maeda

Tsuyoshi Sakaki

Katsuichi Saito

Masao Shibata

Naoto Hashimoto

Yasuhiro Hasa

An organic material production system includes: a pretreatment device () that pulverizes a biomass material (); a hydrothermal decomposition apparatus () that hydrothermally decomposes a pulverized biomass () by causing it to countercurrently contact with hot compressed water (), elutes lignin components and hemicellulose components into the hot compressed water (), and separates the lignin components and the hemicellulose components from a biomass solid residue; a first enzymatic hydrolysis device (-) that treats cellulose in a biomass solid residue (), discharged from the hydrothermal decomposition apparatus, with an enzyme () to enzymatically hydrolyze it to a sugar solution containing hexose; a fermenter () that produces ethanol by fermentation using a sugar solution () obtained by the first enzymatic hydrolysis device (-); and a refinerthat refines an alcohol fermentation liquid (), so as to separate it into ethanol () and a residue ().

Organic material production system using biomass material and method

The invention discloses a novel method for the preparation of a 2-keto carboxylic acid from carbon dioxide by an enzymatic addition reaction with an aldehyde compound. Carbon dioxide, which can be in the form of carbonate ions, is reacted with an aldehyde compound such as acetaldehyde and propionaldehyde under mild reaction conditions in the presence of a decarboxylase to give a 2-keto carboxylic acid such as pyruvic and a 2-ketobutyric acid by a reverse reaction to the enzymatic decarboxylation reaction. The scope of the invention involves contribution to a solution of the environmental problem of global warming due to carbon dioxide as a greenhouse effect gas in the aerospace.

Preparation of 2-keto carboxylic acid from carbon dioxide

Growing community of inventors

Saga, Japan

Noriyuki Yamada