Tailored Pyrolysis Carbon Binders for Lower-Emission Asphalt
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Solution Overview
Problem
The challenge lies in finding suitable applications for the carbon coproduct generated by pyrolysis reactions, as its characteristics and volume often fail to match specific uses, hindering full sequestration of carbon and increasing the carbon footprint of asphalt production.
Innovation Solution
Integrate the carbon coproduct from pyrolysis reactions into asphalt production by using it as a binder replacement or additive, tailored to have properties compatible with bitumen, thereby reducing the need for traditional binders and lowering emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If carbon coproduct is used as binder replacement in asphalt, then the need for traditional binders is reduced and emissions are lowered, but the carbon coproduct must be tailored to have properties compatible with bitumen to avoid damaging pavement performance
Solution Approach 1:
The patent applies parameter changes by tailoring the physical and chemical properties of carbon coproduct through controlled pyrolysis conditions. By adjusting temperature, pressure, and reaction time parameters during pyrolysis, the carbon coproduct is transformed to have specific surface area, pore structure, and chemical composition that are compatible with bitumen, enabling it to function as an effective binder replacement without compromising pavement performance.
Solution Approach 2:
The patent creates a composite material system by combining carbon coproduct with bitumen to form a modified binder. This composite approach leverages the carbon sequestration capability of carbon coproduct while maintaining the adhesive and binding properties of bitumen, achieving both emission reduction and reliable pavement performance through synergistic material combination.
2Ease of manufacture
If carbon coproduct is integrated into asphalt production, then asphalt production costs are reduced, but the characteristics and volume of carbon coproduct must match specific applications
Solution Approach 1:
The patent utilizes parameter changes to adapt carbon coproduct characteristics to match asphalt production requirements. By controlling pyrolysis parameters such as heating rate, residence time, and temperature profile, the carbon coproduct is produced with specific physical and chemical properties including particle size distribution, surface area, and reactivity that are optimized for asphalt binder replacement applications.
Solution Approach 2:
The patent applies preliminary action by pre-treating and characterizing carbon coproduct before its integration into asphalt production. The carbon coproduct undergoes preliminary processing including size classification, surface modification, and compatibility testing with bitumen to ensure it meets the specific requirements of asphalt applications, thereby facilitating cost-effective integration without compromising performance.
3Quantity of substance
If recycled plastics and rubber are used as aggregates to reduce bitumen amount, then the total binder required is reduced, but the additive materials can dramatically increase the viscosity of bitumen, undermining the processibility
Solution Approach 1:
The patent extracts the harmful effect of viscosity increase by separating the carbon coproduct's beneficial functions (carbon sequestration, binder reinforcement) from its potential negative effect (viscosity increase). Through controlled pyrolysis and surface treatment, the carbon coproduct is produced with properties that minimize its impact on bitumen viscosity while maintaining its ability to reduce the total binder requirement and improve pavement performance.
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 carbon coproduct effectively sequesters carbon, reduces asphalt production costs, and improves performance metrics such as viscosity and rutting resistance, while maintaining or enhancing the properties of asphalt products.
Implementation Method 1
a pyrolysis reactor that heats hydrocarbon to a high temperature, thereby converting the hydrocarbon into a hydrogen gas coproduct and a solid carbon coproduct
Data Source
AI summary
Embodiments include a binder mixture, where the binder mixture includes a carbon coproduct from a pyrolysis reaction and a binding agent. Some embodiments include a method of producing a pavement mixture, including receiving a carbon coproduct from a pyrolysis reaction, receiving a binding agent, and blending together the carbon coproduct and the binding agent. Some embodiments include a method of producing a carbon coproduct, including receiving a hydrocarbon, tailoring a pyrolysis reactor to control a carbon coproduct, splitting the hydrocarbon within the pyrolysis reactor, and separating the hydrogen gas and the carbon coproduct, where the carbon coproduct is tailored for a binder mixture. Some embodiments include a system for producing pavement, including a pyrolysis reactor, resulting in a hydrogen gas product and a carbon coproduct, and a pavement system, where the pavement system forms a pavement mixture comprising the carbon coproduct.