Method for producing hydrocarbon fluids with at least partially integrated dihydrogen production

The process integrates hydrogen production from alcohols and separates hydrogen efficiently, addressing high external hydrogen demand and catalyst fouling issues in renewable fuel production, improving the sustainability and efficiency of hydrocarbon fluid manufacturing.

WO2026131588A1PCT designated stage Publication Date: 2026-06-25TOTALENERGIES ONETECH
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
TOTALENERGIES ONETECH
Filing Date
2025-12-15
Publication Date
2026-06-25

AI Technical Summary

Technical Problem

Existing processes for manufacturing renewable fuels from biological feedstocks face challenges such as high external hydrogen demand, catalyst fouling, and inefficient by-product management, particularly in the production of hydrocarbon fluids like jet fuel, which are not adequately addressed by current methods.

Method used

A process that integrates hydrogen production by converting alcohols from hydrolysis into hydrogen through aqueous-phase reforming, while separating and recycling hydrogen, and includes steps to purify and recover valuable by-products like glycerol, using separate reaction zones to maintain catalyst efficiency and reduce external hydrogen consumption.

Benefits of technology

The process effectively recovers alcohols for integrated hydrogen production, reduces catalyst degradation, and minimizes external hydrogen demand, thereby enhancing the efficiency and sustainability of hydrocarbon fluid production from renewable sources.

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Abstract

The invention relates to a method for producing hydrocarbon fluids, in particular paraffins, from a hydrocarbon feedstock of natural origin containing at least 50% by weight of glycerides, the method comprising: a) a step of hydrolyzing the hydrocarbon feedstock of natural origin; b) a step of recovering the products of step a), the recovery step separating a first effluent containing free fatty acids and a second effluent containing alcohols and water; c) a step of hydrotreating said first effluent to convert the free fatty acids into paraffins; e) a step of aqueous-phase reforming of the second effluent recovered in step b), during which at least some of the alcohols contained in the second effluent are converted into dihydrogen, carbon dioxide and carbon monoxide; f) a step of separating the dihydrogen formed during step e), the dihydrogen thus separated being sent to hydrotreatment step c), and optionally to a step d) of hydroisomerizing and / or hydrocracking the hydrotreated effluent.
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