Title:
DEVICE AND METHOD FOR PREPARING IN SITU FORMED BIOCHAR WITH HIGH SPECIFIC SURFACE AREA
Document Type and Number:
WIPO Patent Application WO/2022/036799
Kind Code:
A1
Abstract:
A device and method for preparing in situ formed biochar with a high specific surface area. Crushed and uniformly mixed biomass and a modifier are enabled to enter a hot-pressing pyrolysis device to synchronously complete hot-pressing forming and pyrolysis carbonization, thereby solving the problem of a complicated preparation process with multiple steps and multiple devices of existing formed biochar materials. In situ bonding forming is realized by using low-temperature melting and softening of lignin, and adhesion, bridging, cross-linking, mechanical interlocking and other effects of pyrolysis tar, and no cross-linking agent needs to be added during the process, such that the production cost is low. A biomass pyrolysis charring temperature is reduced by using the coverage and suffocation effects of trace flame-retardant modifiers, excessive ablation is suppressed, a polycondensation reaction is accelerated, the specific surface area and yield of a product are improved, and the cost performance of the product is also improved.
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Inventors:
GAO YUAN (CN)
JIA YONGFENG (CN)
LI AIMIN (CN)
WANG SHAOFENG (CN)
WANG XIN (CN)
JIA YONGFENG (CN)
LI AIMIN (CN)
WANG SHAOFENG (CN)
WANG XIN (CN)
Application Number:
PCT/CN2020/116195
Publication Date:
February 24, 2022
Filing Date:
September 18, 2020
Export Citation:
Assignee:
UNIV DALIAN TECH (CN)
International Classes:
B01J20/20; B01J20/30; B09C1/00
Domestic Patent References:
| WO2009042633A1 | 2009-04-02 |
Foreign References:
| CN101730733A | 2010-06-09 | |||
| CN102260506A | 2011-11-30 | |||
| CN105480974A | 2016-04-13 | |||
| CN107142118A | 2017-09-08 | |||
| EP3199609A1 | 2017-08-02 |
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