Process comprising acid pretreatment and enzymatic hydrolysis

    公开(公告)号:US11008598B2

    公开(公告)日:2021-05-18

    申请号:US15550525

    申请日:2016-03-16

    Abstract: Provided herein is a process for producing a fermentation product from a lignocellulosic feedstock. The process comprises soaking a lignocellulosic feedstock in an aqueous solution to produce a soaked feedstock. The soaked feedstock is at least partially dewatered and the at least partially dewatered feedstock is subjected to pretreating. The pretreatment chemical is sulfur dioxide, sulfurous acid or a combination thereof and can be added to the process at any stage prior to and/or during pretreatment. The pretreated feedstock composition is fed to an enzymatic hydrolysis conducted at a temperature that is higher than 58° C. The cellulose in the pretreated feedstock composition is hydrolyzed with cellulase enzymes in the presence of the dissolved solids to produce glucose. The glucose is fermented to produce the fermentation product.

    LOW TEMPERATURE PRETREATMENT WITH SULFUR DIOXIDE

    公开(公告)号:US20200263209A1

    公开(公告)日:2020-08-20

    申请号:US16761192

    申请日:2018-11-09

    Abstract: A process for producing a fuel from lignocellulosic biomass is disclosed. The process includes obtaining a feedstock comprising lignocellulosic biomass, feeding the feedstock and sulfur dioxide into a pretreatment reactor, wherein a total amount of sulfur dioxide in the pretreatment reactor is greater than 70 wt % based on dry weight lignocellulosic biomass, and heating the feedstock and sulfur dioxide in the pretreatment reactor at one or more temperatures between 110° C. and 150° C. for more than 60 minutes.

    METHOD FOR PRODUCING RENEWABLE FUELS
    34.
    发明申请

    公开(公告)号:US20200071163A1

    公开(公告)日:2020-03-05

    申请号:US16679837

    申请日:2019-11-11

    Inventor: Brian Foody

    Abstract: According to the present invention, organic material is converted to biogas through anaerobic digestion and the biogas is purified to yield a combustible fluid feedstock comprising methane. A fuel production facility utilizes or arranges to utilize combustible fluid feedstock to generate renewable hydrogen that is used to hydrogenate crude oil derived hydrocarbons in a process to make transportation or heating fuel. The renewable hydrogen is combined with crude oil derived hydrocarbons that have been desulfurized under conditions to hydrogenate the liquid hydrocarbon with the renewable hydrogen or alternatively, the renewable hydrogen can be added to a reactor operated so as to simultaneously desulfurize and hydrogenate the hydrocarbons. The present invention enables a party to receive a renewable fuel credit for the transportation or heating fuel.

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