Early warning method and system for excessive catalysis of trace elements in biochar preparation

By real-time monitoring of surface conductivity and mesothermal thermal history during biochar preparation, combined with time-series analysis and KS test, the problem of excessive catalysis by trace elements was identified and prevented, thus solving the problem of carbon fixation backflow during biochar preparation and improving the stability and pass rate of the product's carbon fixation effect.

CN121830807BActive Publication Date: 2026-07-24INST OF AGRI RESOURCES & ENVIRONMENT GUANGDONG ACADEMY OF AGRI SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF AGRI RESOURCES & ENVIRONMENT GUANGDONG ACADEMY OF AGRI SCI
Filing Date
2026-01-20
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing technologies are unable to effectively identify and prevent carbon fixation backflow caused by excessive catalysis of trace elements during biochar preparation, resulting in unstable carbon fixation effects of biochar products in soil. Existing detection methods cannot accurately distinguish whether metals are in an embedded passivated state or a free catalytic state, which can easily lead to misjudgment and missed screening.

Method used

By arranging data acquisition units in the immobilization channel, the surface conductivity and intermediate temperature thermal history are monitored in real time to conduct crystallization residence matching assessment. The risk of over-catalysis is identified by time series analysis and KS test method, and early warning and process adjustment are carried out.

Benefits of technology

Effectively warn and prevent the risk of over-catalysis during biochar preparation, improve the stability of carbon fixation effect and product qualification rate, reduce the occurrence of carbon fixation backflow, and enhance the consistency of carbon fixation capacity of biochar products.

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Abstract

The present application belongs to the field of time series analysis and dynamic early warning technology, and provides a method and system for early warning of excessive catalysis of trace elements in the preparation of biochar, specifically: first, preset a data acquisition unit in the fixation channel, and record the collection position corresponding to the data acquisition unit as the fixation monitoring site; monitor the surface conductance value and the medium-temperature thermal history value in real time from each fixation monitoring site; then, evaluate the crystallization residence matching according to the surface conductance value and the medium-temperature thermal history value, and obtain the residual risk degree of each fixation monitoring site; finally, perform early warning of excessive catalysis according to the residual risk degree. The evaluation of crystallization residence matching through time series analysis can effectively quantify the residual risk of high-energy state surface free metal centers caused by the mismatch between the crystallization enrichment degree in the fixation step of the biochar preparation process and the residence in the medium-temperature zone in the pyrolysis process, thereby improving the consistency of the carbon sequestration capacity of the biochar product and the product qualification rate of the production process.
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Citation Information

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