Integrated Biomass to Liquids Process for Fuel and Biofertilizer Production
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Solution Overview
Problem
Biomass to liquids (BTL) processes face challenges such as low thermal efficiency, inability to utilize CO2 and inorganic byproducts, and high greenhouse gas emissions, which hinder their economic and environmental viability.
Innovation Solution
An integrated biomass to liquids (IBTL) process that involves direct liquefaction of biomass, pyrolysis to produce structured biochar and hydrogen, upgrading of liquids, and using CO2 to produce algae-based biofertilizers, which reduces carbon footprint and efficiently utilizes byproducts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If biomass is converted to hydrocarbon fuels through conventional BTL processes, then liquid fuel products are produced, but up to half of the carbon in biomass is converted to CO2 and vented to the atmosphere
Solution Approach 1:
The patent captures CO2 emitted during biomass liquefaction and uses it as a carbon source for cultivating algae. The algae consume the CO2 through photosynthesis, converting it into biomass that can be processed into biofertilizers. This transforms the harmful CO2 emission into a valuable resource, eliminating net greenhouse gas emissions while producing additional beneficial products.
Solution Approach 2:
Instead of discarding CO2 as a waste product to be vented or sequestered, the patent recovers it from the liquefaction process and reuses it in the algae cultivation system. This closed-loop approach recovers what would otherwise be lost, converting a waste stream into a feedstock for producing biofertilizers and further reducing emissions.
2Object-generated harmful factors
If CO2 is captured and sequestered by re-injecting it into subterranean formations, then CO2 emissions are reduced, but process energy efficiency is further reduced and high costs are incurred
Solution Approach 1:
Rather than treating CO2 sequestration as an energy-intensive waste disposal operation, the patent converts CO2 into a valuable feedstock for algae cultivation. The algae use CO2 for photosynthesis, producing biomass that generates oxygen and valuable organic compounds. This approach eliminates the need for energy-intensive geological injection while creating additional economic value.
Solution Approach 2:
The algae cultivation system performs the carbon sequestration function autonomously through natural photosynthesis, without requiring external energy input for compression or injection. The biological system self-regulates CO2 uptake based on its growth requirements, eliminating the need for mechanical sequestration infrastructure and associated energy costs.
3Quantity of substance
If direct pyrolysis methods are used for liquefying biomass, then liquid products are produced, but unwanted byproducts such as char and inorganics are generated that are of limited or no value
Solution Approach 1:
The patent employs multiple processing pathways that handle different biomass fractions differently: hydroprocessing for direct liquefaction, pyrolysis for residue conversion, and algae cultivation for CO2 utilization. Each pathway is optimized for its specific function, allowing the system to maximize liquid fuel production while converting byproducts into valuable materials like biofertilizers containing char and inorganics.
Solution Approach 2:
The patent recovers char and inorganic byproducts from pyrolysis and hydroprocessing, incorporating them into biofertilizer formulations alongside algae biomass. These materials, which would otherwise be discarded as waste, are transformed into valuable soil amendments containing carbon, nutrients, and beneficial microorganisms, eliminating the loss of substance.
4Quantity of substance
If conventional BTL processes are used, then liquid fuels are produced, but thermal efficiency is relatively low
Solution Approach 1:
The patent merges multiple processes into an integrated system: biomass hydroprocessing, pyrolysis, algae cultivation, and biofertilizer production. These processes are coupled so that byproducts of one become feedstocks for another, creating synergies that improve overall thermal efficiency. For example, CO2 from liquefaction fuels algae growth, and pyrolysis residues are converted to biofertilizers, minimizing energy waste.
Solution Approach 2:
The integrated system maintains continuous useful action by eliminating idle byproduct streams. CO2, char, inorganics, and other byproducts are continuously diverted to subsequent processing stages rather than being vented or discarded. This continuous utilization of material and energy flows maximizes thermal efficiency throughout the entire process chain.
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 process achieves efficient production of premium fuels and biofertilizers with significantly reduced carbon emissions, enhancing thermal efficiency and soil fertility while sequestering large amounts of atmospheric CO2.
Implementation Method 1
pyrolysis to produce structured biochar and hydrogen
Implementation Method 2
using CO2 to produce algae based biofertilizers
Implementation Method 3
the structured biochar produced during the pyrolysis is used as a nucleation agent for facilitating the production of the algae
Implementation Method 4
as absorption agent for extracting inorganics, such as phosphorus, potassium and other metals, from the biomass feedstock prior to liquefaction or from the liquid product of the liquefaction
Data Source
AI summary
An IBTL system having a low GHG footprint for converting biomass to liquid fuels in which a biomass feed is converted to liquids by direct liquefaction and the liquids are upgraded to produce premium fuels. Biomass residues from the direct liquefaction, and optionally additional biomass is pyrolyzed using microwave pyrolysis to produce structured biochar, hydrogen for the liquefaction and upgrading, and CO2 for conversion to algae, including blue green algae (cyanobacteria) in a photobioreactor (PBR). Produced algae and diazotrophic microorganisms are used to produce a biofertilizer that also contains structured biochar. The structured biochar acts as a nucleation agent for the algae in the PBR, as a absorption agent to absorb inorganics from the biomass feed to direct liquefaction or from the liquids produced thereby, and as a water retention agent in the biofertilizer. The ratio of cyanobacteria to diazotrophic microorganisms in the biofertilizer can be selected so as to achieve desired total chemically active carbon and nitrogen contents in the soil for a given crop.