Biomass Fuel Slurry Encapsulation for Gasification
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Solution Overview
Problem
Biomass fuels face challenges due to low energy density, high moisture content, and water uptake issues, which limit their effective use in gasification processes, particularly when blended with coal, and the inclusion of waste plastics is hindered by inconsistent quality and operational problems.
Innovation Solution
A biomass fuel slurry is created by encapsulating biomass materials in a thin layer of plastic, reducing water uptake and enhancing hydrophobicity, allowing for a pumpable slurry with improved energy density and reduced porosity, using a mixture of biomass, waste plastics, and coal with specific mass ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If biomass is used as fuel material, then renewable carbon source and carbon-neutral gasification is achieved, but low volumetric energy density and high moisture content reduce heating value
Solution Approach 1:
The patent combines biomass with waste plastics and coal in a blended fuel formulation. The waste plastics contribute high heating value similar to coal, while biomass provides renewable carbon content. This merging of materials achieves carbon-neutral gasification while maintaining adequate heating value for practical energy production.
Solution Approach 2:
The invention creates a composite fuel material consisting of biomass, waste plastics, and coal. This composite formulation leverages the complementary properties of each component: biomass for renewability, waste plastics for high energy density, and coal for stable combustion characteristics, achieving both environmental and energy efficiency goals.
2Reliability
If biomass is blended with coal, then renewable energy content is increased, but low heating value of biomass limits the amount of biomass that can be included
Solution Approach 1:
Waste plastics serve as an intermediary material in the fuel blend. They have heating values similar to coal, so they can be mixed with coal without significantly diluting the overall heating value. This intermediary allows biomass to be included at higher proportions while maintaining the heating value requirements for practical energy production.
3Quantity of substance
If waste plastics are included in gasification, then disposal volume is reduced and heating value is increased, but inconsistent quality and operational problems occur
Solution Approach 1:
The patent incorporates waste plastics into a homogeneous blended fuel formulation with biomass and coal. This uniform mixing ensures consistent combustion characteristics and reduces operational problems associated with heterogeneous waste plastic feedstock. The standardized blend ratio and preparation method provide reliability while maximizing waste plastic utilization.
4Volume of stationary object
If biomass is torrefied and densified, then energy density and hydrophobic properties are improved, but mass loss and heating value reduction occur
Solution Approach 1:
Instead of torrefying biomass alone and accepting the 20% mass loss, the patent combines torrefied biomass with waste plastics and coal in a blended fuel. The waste plastics and coal contribute additional mass and heating value, compensating for the torrefaction losses while achieving the desired energy density improvement from the torrefied biomass component.
5Ease of operation
If biomass pellets are produced, then transport and handling are improved, but high porosity causes excessive water uptake
Solution Approach 1:
The patent creates a composite fuel blend where hydrophobic waste plastics and coal are mixed with biomass pellets. This composite material reduces the overall water uptake of the fuel blend while maintaining the convenient pelletized form factor for easy transport and handling. The hydrophobic components protect the porous biomass structure from excessive water absorption.
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 approach results in a slurry with reduced water uptake and increased energy density, enabling efficient gasification and power generation, utilizing a mixture of biomass, waste plastics, and coal with improved hydrophobicity and porosity reduction, achieving a heating value closer to coal.
Implementation Method 1
encapsulating biomass materials in a thin layer of plastic, reducing water uptake and enhancing hydrophobicity
Implementation Method 2
The biomass material of the mixture is encapsulated in a thin layer of the plastic
Implementation Method 3
A biomass fuel slurry is created by encapsulating biomass materials in a thin layer of plastic, reducing water uptake and enhancing hydrophobicity, allowing for a pumpable slurry with improved energy density and reduced porosity, using a mixture of biomass, waste plastics, and coal with specific mass ratios
Data Source
AI summary
A biomass fuel slurry includes a mixture of a biomass material and a plastic material suspended in water. In other embodiments, the biomass fuel slurry also includes coal. A method of making a biomass fuel slurry includes the steps of encapsulating a biomass material with a plastic material to produce a plastic encapsulated biomass material and suspending the plastic encapsulated biomass material in water.