Quantitative evaluation method for activation energy of pyrolysis of graded diesel particulates
US11977092B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2020 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Sep 3, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/0288
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A quantitative evaluation method for activation energy of pyrolysis of graded diesel particulates is disclosed, relating to the technical field of diesel particulate emission. The present disclosure includes four major steps: grading of particulates, pretreatment of the particulates, thermogravimetry test for the particulates in different particle size ranges, and mathematical analysis on obtained thermogravimetric data by using a Flynn-Wall-Ozawa (FWO) formula. The particulates are collected and treated by using a micro-orifice uniform deposit impactor and a thermogravimetric analyzer, to obtain thermogravimetry/differential thermogravimetry (TG/DTG) curves of the particulates in different particle size ranges, and final activation energy values of pyrolysis of the particulates in different particle size ranges are obtained by linear fitting of the obtained data. The present disclosure can quickly and accurately obtain oxidation activation energy of to-be-tested diesel particulates of different particle sizes, thereby providing effective parameters for regeneration design of a diesel particulate filter (DPF).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.