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China Drying Network News DuPont announced on November 30 that the cellulose ethanol plant in Nevada, Iowa, broke ground. The plant has invested more than 200 million U.S. dollars and is expected to be completed by mid-2014. At that time, it will produce 30 million gallons (about 80,000 tons) of cellulose biofuel products each year. The raw materials used are mainly corn straw, corn cob, and other wastes. This will become the world's largest commercial cellulose biorefining project.
DuPont originally designed the ethanol facility to process 1,300 tons of corn stover per day, producing 27.5 million gallons of ethanol per year. The scale of the project announced this time is bigger than the initial one. DuPont said that the data from the verification facility in Tennessee has enabled DuPont to further optimize the process and technology. The capital investment for the annual design capacity of this commercial scale installation is approximately $7 per gallon.
The cellulosic ethanol production process includes five steps of grinding, pretreatment, enzymatic saccharification, mixed sugar fermentation and product separation. The new enzyme and fermentation microbial optimization technology package developed by the company can result in a lower investment of integrated unit operations. DuPont stated that its fully integrated production system can transfer technology worldwide.
It is understood that the project will use DuPont's Accellerase TRIO enzyme complex. This enzyme has a wide range of raw materials and pretreatment technology and can provide all the required enzyme activities for the efficient hydrolysis of biomass to carbon-5 and carbon hexasaccharides. , and the amount of enzyme is only half of the previous enzyme use.
James Collins, president of DuPont's industrial biosciences business, said: "About 10 years ago, DuPont set out to develop innovative technologies to achieve low capital expenditures and low-cost production of cellulosic ethanol. It will enlarge the innovative production process of DuPont. Integrated into a comprehensive technology platform, we will build a cellulosic ethanol project that is affordable and sustainable for our customers.â€
It is understood that in order to ensure the supply of raw materials for this project, DuPont will contract with more than 500 local farmers to collect, store and transport more than 375,000 tons of corn stalks for the project each year. In addition to creating 60 regular factory jobs, the project also requires more than 150 people to engage in the collection, stacking, transportation, and storage of corn stalks during each harvest season.
DuPont also plans to further promote its cellulosic ethanol technology to other raw materials. It has been alleged that they have begun experiments with switchgrass to produce ethanol on a verification device that was conducted in collaboration with the University of Tennessee in Knoxville.
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