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    Methods for methanol-to-gasoline conversion with forwarding methanol processing
    31.
    发明授权
    Methods for methanol-to-gasoline conversion with forwarding methanol processing 有权

    公开(公告)号：US11130915B2

    公开(公告)日：2021-09-28

    申请号：US16903252

    申请日：2020-06-16

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Mohsen N. Harandi ,  Suriyanarayanan Rajagopalan ,  David W. Staubs ,  Terry E. Helton ,  Mitch L. Hindman

    IPC: C10G3/00 ,  B01D3/00 ,  C07C41/09 ,  C10L1/06 ,  C07C41/42

    Abstract: Methanol-to-gasoline (MTG) conversion may be performed with forward methanol processing. Methanol may be fed to a first reactor where it may be catalytically converted under dimethyl ether formation conditions in the presence of a first catalyst to form a product mixture comprising dimethyl ether (DME), methanol, and water. The DME may be separated from the methanol and the water and delivered to a second reactor. In the second reactor, the DME may be catalytically converted under MTG conversion conditions in the presence of a second catalyst to form a second product mixture comprising gasoline hydrocarbons and light hydrocarbon gas. The methanol and the water from the first reactor may be separated further to obtain substantially water-free methanol, which may be delivered to the second reactor. The separation of methanol from the water may be performed using the light hydrocarbon gas to effect stripping of the methanol.

    Advanced steam cracking
    34.
    发明授权
    Advanced steam cracking 有权

    公开(公告)号：US11103844B2

    公开(公告)日：2021-08-31

    申请号：US16453339

    申请日：2019-06-26

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Mohsen N. Harandi

    IPC: B01J8/18 ,  B01J8/22 ,  C10G9/16 ,  C10G9/32

    Abstract: A process and system that use the heat produced in the generation of Syngas to provide heat to an endothermic reaction zone are disclosed. A method for providing heat to an endothermic reaction may comprise producing Syngas in a reforming reactor. The method may further comprise recovering heat from the producing the Syngas to heat an endothermic reaction stream in a heat transfer zone. The method may further comprise allowing reactants in the endothermic reaction stream to react to form an endothermic reaction product stream. The method may further comprise withdrawing the endothermic reaction product stream from the heat transfer zone.

    METHODS OF COMPOSITIONAL ANALYSIS OF ALGAL BIOMASS
    35.
    发明申请
    METHODS OF COMPOSITIONAL ANALYSIS OF ALGAL BIOMASS 有权

    公开(公告)号：US20210262995A1

    公开(公告)日：2021-08-26

    申请号：US17142786

    申请日：2021-01-06

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Anding Zhang ,  Kuangnan Qian ,  Chengrong Wang ,  Amy C. Clingenpeel

    IPC: G01N31/12

    Abstract: The present disclosure relates to methods for compositional analysis of algal biomass, specifically weight percent elemental composition. In at least one embodiment, a method for compositional analysis of an algae sample includes flash combusting a first portion of the algae sample to provide a carbon wt %, a hydrogen wt %, and a nitrogen weight %. The method includes pyrolysing a second portion of the algae sample to provide an oxygen wt %. The method includes scanning a third portion of the algae sample using x-ray fluorescence to provide an elemental intensity. The method includes normalizing the elemental intensity using the carbon wt %, the hydrogen wt %, the nitrogen wt %, and/or the oxygen wt %.

    Interface between processing environment optimization layers
    40.
    发明授权
    Interface between processing environment optimization layers 有权

    公开(公告)号：US11073804B2

    公开(公告)日：2021-07-27

    申请号：US16150451

    申请日：2018-10-03

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Max A. Fahrenkopf ,  William P. Snow ,  Ivan E. Rodriguez Colon

    IPC: G05B13/04 ,  G05B17/02 ,  G06F17/15 ,  G06N7/08 ,  G06F17/11 ,  G06N5/00

    Abstract: Systems and methods are provided for interfacing multiple layers of optimization for a model of one or more processes in a processing environment to achieve increased or maximized stability in the underlying layer. To improve consistency between the solutions at the different model levels, the lower level of optimization can have extra constraints added to the optimization problem which target variables at their unconstrained values in the upper layer of optimization. The systems and methods can facilitate selection of variables to receive an external target such that stability of the solution is improved or maximized. This can be achieved, at least in part, by identifying variables that provide a reduced or minimized condition number for a sub-matrix in the lower level model when an additional external constraint is applied. The sub-matrix with the reduced or minimized condition number can correspond to a partitioned portion of the gain matrix that corresponds to unconstrained independent variables and constrained dependent variables.

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