Hydrocracking Catalyst NiMo Ratio for Biomass Deoxidation
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Solution Overview
Problem
Existing hydrocracking catalysts fail to sufficiently enhance deoxidation activity when used with biomass feedstocks and coal liquefaction oils, leading to high oxygen component content in hydrocarbons.
Innovation Solution
A catalyst comprising a porous oxide carrier with supported nickel and molybdenum, subjected to hydrogen reduction treatment, with a nickel-to-molybdenum mass ratio of 0.55 to 0.75 and incorporating solid acid oxides like zeolite or silica-alumina, which reduces oxygen content in hydrocarbons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a NiMo catalyst subjected to sulfurization treatment is used with optimal Ni/Mo atomic ratio for sulfurized catalysts, then deoxidation reaction selectivity is enhanced, but deoxidation activity is insufficient when using biomass feedstock and coal liquefaction oil
Solution Approach 1:
The invention changes the pretreatment parameter from sulfurization to reduction treatment, and adjusts the Ni/Mo atomic ratio parameter to 1/4 to 1/2 (higher nickel content than conventional sulfurized catalysts). This parameter combination specifically addresses the insufficient deoxidation activity with biomass and coal liquefaction oil while maintaining good selectivity
Solution Approach 2:
The invention uses a composite catalyst system combining nickel and molybdenum metals supported on a carrier, where the synergistic effect of Ni and Mo provides both high deoxidation activity and selectivity. The composite structure allows the catalyst to effectively handle diverse feedstocks including biomass and coal liquefaction oil
2Ease of manufacture
If the Ni/Mo atomic ratio is optimized for sulfurized catalysts (around 0.15 mass ratio), then catalyst performance is optimized for sulfurized conditions, but deoxidation activity remains insufficient for biomass and coal liquefaction oil
Solution Approach 1:
The invention fundamentally changes the pretreatment parameter from sulfurization to reduction, and accordingly adjusts the compositional parameter (Ni/Mo atomic ratio) to 1/4 to 1/2. This dual parameter optimization enables the catalyst to achieve high deoxidation activity with biomass and coal liquefaction oil without requiring sulfurization treatment
3Ease of operation
If existing catalysts are used without adjustment, then conventional hydrocracking processes can be maintained, but oxygen component content in produced hydrocarbons remains high
Solution Approach 1:
The invention optimizes the catalyst parameters (Ni/Mo atomic ratio of 1/4 to 1/2 and reduction pretreatment) to enhance deoxidation capability, thereby reducing oxygen component content in the produced hydrocarbons while maintaining process simplicity and ease of operation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The catalyst effectively decreases oxygen component content in hydrocarbons produced from vegetable, animal, and coal liquefaction oils, enhancing deoxidation activity and catalyst efficiency.
Implementation Method 1
the catalyst for hydrocracking has been subjected to a hydrogen reduction treatment
Implementation Method 2
a catalyst for hydrocracking that is capable of decreasing the content of oxygen components contained in hydrocarbons synthesized from a vegetable fat or oil, an animal fat or oil, and/or a coal liquefaction oil
Data Source
AI summary
The present invention is to provide a catalyst for hydrocracking that is capable of decreasing the content of oxygen components contained in hydrocarbons synthesized from a vegetable fat or oil, an animal fat or oil, and/or a coal liquefaction oil each containing at least one selected from a fatty acid, a fatty acid ester, and an alkylphenol compound, and a hydrocarbon production method using the same. The catalyst for hydrocracking of the present invention contains a carrier containing a porous oxide, and nickel and molybdenum supported on the carrier, the catalyst for hydrocracking being subjected to a hydrogen reduction treatment, and having a mass ratio (X/(X+Y)) of a nickel content (X) in terms of nickel oxide (NiO) to the sum of the nickel content (X) in terms of nickel oxide (NiO) and a molybdenum content (Y) in terms of molybdenum oxide (MoO3) of 0.5 or more and 0.9 or less. The hydrocarbon production method of the present invention includes producing hydrocarbons from a vegetable fat or oil, an animal fat or oil, and/or a coal liquefaction oil each containing at least one selected from a fatty acid, a fatty acid ester, and an alkylphenol compound, by using the catalyst for hydrocracking of the present invention.