Reduced h2 consumption during deoxygenation
AssigneeExxonMobil Technology and Engineering Company
InventorsMegan E. WITZKE, Randolph J. SMILEY, Chuansheng BAI, Scott J. WEIGEL, Xiaochun XU
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Abstract
Systems and methods are provided for reducing hydrogen consumption during deoxygenation of bio-derived (or at least partially bio-derived) feedstocks. The reduced hydrogen consumption is achieved by performing the deoxygenation in the presence of a bulk multimetallic catalyst and/or in the presence of a base metal dewaxing catalyst having reduced metal stack heights. Additionally, due in part to being able to reduce or minimize hydrogen consumption, the heat release during deoxygenation can also be reduced, thus allowing a smaller catalyst volume to perform deoxygenation.
Claims19
A method for processing a bio-derived feedstock, comprising:
- exposing a feed comprising a bio-derived feedstock, the feed having an organic oxygen content of 1.0 wt % or more, to a bulk multimetallic catalyst comprising at least one Group 6 metal and at least one Group 8-10 metal under deoxygenation conditions to form a deoxygenated effluent comprising hydrocarbons, CO, CO2, and water, a weight ratio of CO2 to water in the deoxygenated effluent being 1.0 or more, a weight ratio of CO to CO2 being 0.5 or less;
- and
- cascading at least a portion of the deoxygenated effluent to an isomerization catalyst under isomerization conditions to form an isomerized, deoxygenated effluent.
Dependencies are inferred from the claim text.