Tall Diesel Composition Hydrotreating Optimization
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Solution Overview
Problem
Current tall diesel compositions from crude tall oil do not optimize processing for hydrotreating, leading to suboptimal renewable diesel fuel production, with high hydrogen consumption and inadequate boiling point distribution, density, and lubricity.
Innovation Solution
A tall diesel composition comprising 50-98 wt% carboxylic acids, 1-20 wt% rosin acids, 6-35 wt% saturated fatty acids, and 59-74 wt% unsaturated fatty acids, optimized for hydrotreating to mimic fossil diesel fuel properties, reduce hydrogen consumption, and enhance viscosity and lubricity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional tall diesel compositions are used for hydrotreating, then processing can proceed, but hydrogen consumption is excessively high and fuel properties are suboptimal
Solution Approach 1:
The patent applies parameter changes by precisely controlling the composition parameters of tall diesel, specifically maintaining carboxylic acids at 50-98 wt%, saturated fatty acids at 6-35 wt%, and unsaturated fatty acids at 59-74 wt%. This optimization of compositional parameters reduces hydrogen consumption during hydrotreating while maximizing renewable diesel fuel yield by creating a balanced feedstock composition that requires less hydrogenation.
2Stability of the object's composition
If conventional tall diesel compositions are used, then processing can proceed, but boiling point distribution and density are inadequate compared to fossil diesel
Solution Approach 1:
The patent optimizes compositional parameters to achieve boiling point distribution and density similar to fossil diesel. By controlling the ratio of saturated to unsaturated fatty acids and maintaining specific carboxylic acid content, the resulting renewable diesel fuel attains comparable physical properties to conventional fossil diesel, improving fuel quality and stability.
3Stability of the object's composition
If conventional tall diesel compositions are used for hydrotreating, then processing can proceed, but viscosity and lubricity are inadequate
Solution Approach 1:
The patent adjusts compositional parameters, specifically maintaining higher unsaturated fatty acid content (59-74 wt%) and controlled saturated fatty acid content (6-35 wt%), to achieve optimal viscosity and lubricity. These compositional changes ensure the renewable diesel fuel maintains adequate film strength and flow properties, improving overall fuel performance and reliability.
Data Source
AI summary
There is a tall diesel composition obtainable from crude tall oil. The tall diesel composition has carboxylic acids in a range of 50-98 wt % and neutral components in a range of 2-50 wt %. The tall diesel composition has 1-20 wt % rosin acids, 6-35 wt % saturated fatty acids, and 59-74 wt % unsaturated fatty acids.