Online analyzer for biofuel production
AssigneeExxonMobil Research and Engineering Company
InventorsChengrong Wang, Anding Zhang, Xiaochun Xu, Samuel J. Cady, Shifang Luo, Michael H. Ring, Maria Vanessa C. Aguinaldo, John Della Mora, Kegun L. Ream
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Abstract
Disclose is an online analyzer to monitor conversion of a biofeedstock in a first hydrotreating stage to avoid catalyst poisoning in a subsequent stage. An example method of processing a biofeedstock may comprise hydrotreating the biofeedstock by reaction with hydrogen to form a hydrotreated biofeedstock. The method may further comprise monitoring conversion of the biofeedstock in the hydrotreating with an online analyzer.
Claims21
A method of processing a biofeedstock, comprising:
- hydrotreating the biofeedstock by reaction with hydrogen to form a hydrotreated biofeedstock;
- monitoring conversion of the biofeedstock in the hydrotreating with an online analyzer;
- and
- controlling recycle of the hydrotreated biofeedstock to the hydrotreating in response to the monitoring conversation of the biofeedstock.
A system for production of renewable diesel comprising:
- a hydrotreatment stage comprising a hydrodeoxygenation reactor that receives a biofeedstock;
- a dewaxing stage comprising a dewaxing reactor that receives a hydrotreated product stream from the hydrotreatment stage;
- an online analyzer positioned to analyze the hydrotreated product stream to monitor conversion of the biofeedstock in the hydrotreatment stage;
- and
- a controller that controls recycles of the hydrotreated product stream in response to measurements from the online analyzer.
(canceled)
A method of processing a biofeedstock, comprising:
- hydrotreating the biofeedstock in a hydrodeoxygenation reactor by reaction with hydrogen to form a hydrodeoxygenation reactor effluent stream comprising hydrotreated biofeedstock;
- monitoring conversion of the biofeedstock in the hydrotreating with an online analyzer;
- controlling recycle of the hydrotreated biofeedstock to the hydrodeoxygenation reactor in response to the monitored conversion of the biofeedstock, wherein the hydrotreated biofeedstock is recycled until a peak intensity for a carbonyl peak on an infrared spectrum from the online analyzer is below a set intensity value;
- and
- contacting at least a portion of the hydrotreated biofeedstock with a dewaxing catalyst to isomerize paraffinic molecules in the hydrotreated biofeedstock.
Dependencies are inferred from the claim text.