Particulate Vanadium Oxide Desulfurization Catalyst
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Solution Overview
Problem
Existing desulfurization catalysts for catalytic cracked gasoline have low desulfurization activity and cracking efficiency, and they often lead to increased generation of hydrogen and coke due to the destruction of zeolite structures by vanadium, which reduces their effectiveness.
Innovation Solution
A desulfurization catalyst comprising porous spherical particles of inorganic oxide containing particulate vanadium oxide, with an average diameter of 0.1 to 10 μm and a vanadium oxide content of 0.3 to 3 weight %, along with antimony, which maintains high cracking activity and suppresses hydrogen and coke generation by distributing vanadium oxide in a particulate state and enhancing sulfur compound affinity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oxidized vanadium metal is used as desulfurization catalyst, then desulfurization capability is improved, but cracking activity decreases due to destruction of molecular sieve crystalline structure
Solution Approach 1:
The patent changes the physical state parameter of vanadium from oxidized/cationic form to particulate metallic form with specific size (0.1-10 μm). This parameter change allows vanadium to maintain desulfurization capability while avoiding destruction of the molecular sieve crystalline structure, thus preserving cracking activity.
Solution Approach 2:
The patent applies local quality by distributing vanadium oxide as discrete particulate matter (0.1-10 μm) throughout the catalyst rather than as a homogeneous oxidized phase. This localized particulate distribution enables desulfurization function while minimizing structural damage to the molecular sieve.
2Adaptability or versatility
If vanadium is homogeneously carried on inorganic porous carrier, then desulfurization function is provided, but affinity with sulfur compounds is low resulting in low desulfurization activity
Solution Approach 1:
The patent changes the distribution parameter of vanadium from homogeneous to particulate (0.1-10 μm). This creates localized high-concentration zones of vanadium that significantly enhance affinity with sulfur compounds and desulfurization activity while maintaining the overall desulfurization function.
3Productivity
If Y-zeolite is used as FCC catalyst, then cracking activity is maintained, but sulfur content removal effect is insufficient without additional vanadium
Solution Approach 1:
The patent creates a composite catalyst system combining Y-zeolite (for cracking activity) with particulate vanadium oxide (for desulfurization). The composite structure allows both functions to coexist: Y-zeolite maintains cracking activity while particulate vanadium oxide provides effective sulfur removal through its high affinity and particulate distribution.
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 achieves high desulfurization activity and maintains cracking efficiency while minimizing hydrogen and coke production, as the particulate vanadium oxide and antimony effectively manage sulfur compound removal and zeolite stability during catalytic cracking.
Implementation Method 1
the catalyst has high affinity with sulfur compounds, so that the activity for desulfurization is high
Implementation Method 2
desulfurization catalyst for catalytic cracked gasoline containing particulate vanadium oxide
Implementation Method 3
porous spherical particles of inorganic oxide containing particulate vanadium oxide
Implementation Method 4
the catalyst achieves high desulfurization activity and maintains cracking efficiency while minimizing hydrogen and coke production
Data Source
AI summary
The desulfurization catalyst for catalytic cracked gasoline according to the present invention has high performance in removal of sulfur compounds in gasoline fractions. This catalyst contains particulate vanadium oxide having the average particle diameter in the range from 0.1 to 10 μm at the content in the range from 0.3 to 3 weight % calculated as that of V2O5. The porous spherical particles of inorganic oxide are made of crystalline aluminosilicate zeolite and a porous inorganic oxide matrix, and furthermore contain antimony.