Modified Carbon Material Reducing Ignition Temperature
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Solution Overview
Problem
Current carbonaceous heat sources for carbon-heated non-combustible cigarettes face challenges in achieving easy ignition, uniform heat release, and controllable combustion rates, with existing solutions being complex and costly.
Innovation Solution
A modified carbon material is developed by combining carbon black with copper oxide (CuO) as a modifier, where the carbon material is treated with a copper sulfate solution and an alkali solution to reduce ignition temperature and enhance peak thermal power, using a method suitable for industrial production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If biomass materials are used as carbon source for carbonaceous heat source, then the material is low in cost and easy to obtain, but the combustion performances cannot be accurately controlled and regulated
Solution Approach 1:
The patent applies parameter changes by controlling the pyrolysis temperature (a key parameter) to obtain carbon materials with different combustion characteristics. By adjusting the pyrolysis temperature, the invention produces carbon materials with varying ignition temperatures and combustion rates, enabling accurate control of combustion performances while maintaining the use of low-cost biomass materials.
Solution Approach 2:
The patent uses composite materials by mixing different carbon materials obtained from pyrolysis at various temperatures. This composite approach allows the combination of carbon materials with different properties to achieve desired combustion characteristics, resolving the contradiction between using simple biomass materials and achieving precise combustion control.
2Reliability
If carbon materials are used for carbonaceous heat source, then the heat source can maintain combustion, but the ignition is difficult and the combustion rate is not controllable
Solution Approach 1:
The patent changes the combustion parameters by producing carbon materials through pyrolysis at different temperatures, which results in carbon materials with different ignition temperatures and combustion rates. This allows the combustion rate and ignition characteristics to be controlled and adjusted according to specific requirements while maintaining reliable combustion.
Solution Approach 2:
The patent applies dynamics by creating a controllable combustion system where the combustion rate can be adjusted. By mixing carbon materials with different combustion characteristics, the system becomes dynamic and adaptable, allowing control over ignition timing and combustion rate to match operational requirements.
3Manufacturing precision
If mixed carbon materials are used to control combustion performances, then the combustion characteristics can be regulated, but the heat release is not homogeneous
Solution Approach 1:
The patent applies local quality by ensuring that the mixed carbon materials maintain uniform distribution and consistent local properties throughout the carbonaceous heat source. This allows different regions of the heat source to have controlled combustion characteristics while maintaining overall homogeneity in heat release, resolving the contradiction between controlling combustion characteristics and achieving uniform heat 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 modified carbon material exhibits reduced ignition temperature, increased peak thermal power, and controllable combustion characteristics, offering easy ignition and homogeneous heat release, while being cost-effective and suitable for large-scale industrial production.
Implementation Method 1
the modifier is CuO... for reducing ignition temperature of a carbonaceous material
Implementation Method 2
soaking the carbonaceous material in a copper sulfate solution... adding an alkali solution into the solution... filtering and drying to obtain a solid
Data Source
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AI summary
A modified carbon material, comprising a carbonaceous material and a water-insoluble modifier combined with the carbonaceous material, the modifier being CuO, the carbonaceous material being one of or a mixture of biomass carbon or carbon black, the mass of the modifier being 0.1-10wt% of the carbonaceous material. When used as a combustion heat source, the modified carbon material can reduce ignition temperature of a carbonaceous material, increase peak thermal power and/or reduce peak thermal power temperature.