Study on Carbocoal as Microwave Absorber in Microwave Field

2015 ◽  
Vol 1088 ◽  
pp. 721-725
Author(s):  
Song Liu ◽  
Ming Xu Zhang ◽  
Hao Xia
Keyword(s):  
Heating Rate ◽  
Microwave Field ◽  
Pyrolysis Temperature ◽  
Microwave Absorber ◽  
Coal Pyrolysis ◽  
Final Temperature ◽  
Absorbing Material ◽  
Microwave Absorbing ◽  
Rapid Pyrolysis

The present paper decribed the effects of carbocoal on temperature rising characteristic during coal pyrolysis at different temperature in microwave field. Different mixture rate of carbocoal with coal and different final temperature on coal pyrolysis tempereature rising characteristics were studied in the work. The results indicate: Coal is a poorly microwave absorbing material. Because carbocoal can be fast heated in microwave field, so it can be used as additive for coal pyrolysis. Carbocoal otained from different pyrolysis temperature have different heating rate, along with the increase of carbocoal pyrolysis temperature, carbocoal heating rate increases in microwave field. Using carbocoal as microwave absorbent for coal rapid pyrolysis in microwave field is feasible.

The Effect of Additive on Temperature Rising Characteristics during Coal Pyrolysis in Microwave Field

2012 ◽  
Vol 512-515 ◽  
pp. 1790-1794
Author(s):  
Quanrun Liu ◽  
Hao Xia
Keyword(s):  
Heating Rate ◽  
Microwave Field ◽  
Pyrolysis Temperature ◽  
Coal Pyrolysis ◽  
Final Temperature ◽  
Absorbing Material ◽  
Microwave Absorbing ◽  
Rapid Pyrolysis

The pesent paper decribed the effects of additive on temperature rising characteristic during coal pyrolysis at different temperature in microwave field. Different mixture rate of carboncoal with coal and different final temperature on coal pyrolysis tempereature rising characteristics were studied in the work. The results indicate: Coal is a poorly microwave absorbing material, and its pyrolysis in microwave field need to add a certain amount of microwave absorbent for higher heating rate; Because carbocoal can be fast heated in microwave field, so it can be used as additive for coal pyrolysis. Carbocoal otained from different pyrolysis temperature have different heating rate, along with the increase of carbocoal pyrolysis temperature, carbocoal heating rate increases in microwave field. Using charcoal as microwave absorbent for coal rapid pyrolysis in microwave field is feasible.

scholarly journals Preparation and Characterization of High Magnetic Loss Microwave Absorber for Splitter Load

2020 ◽  
Vol 186 ◽  
pp. 03006
Author(s):  
Lan Tian ◽  
Dong Lichao ◽  
Li Nan ◽  
Zhang Chunbo ◽  
Zhang Hao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Iron Powder ◽  
Carbonyl Iron ◽  
Mechanical Performance ◽  
Magnetic Loss ◽  
Microwave Absorber ◽  
Electromagnetic Properties ◽  
Carbonyl Iron Powder ◽  
Absorbing Material ◽  
Microwave Absorbing

Microwave absorbing material was prepared using epoxy resin as matrix and spherical carbonyl iron powder (s-CIP), flaky carbonyl iron powder (f-CIP) as absorbing agent. Microwave absorbing, mechanical properties and structure of the composites containing different kinds of carbonyl iron powder (CIP) were investigated. The results show that the microwave absorber with flaky CIP have better electromagnetic properties than composites with spherical CIP. With concentration of spherical CIP increasing the electromagnetic properties of composites becomes better, except for the mechanical performance. The flaky CIP/epoxy resins composites with a loading of 79 wt% plate-like CIP has attenuation constant of 25.443 dB/cm in 3 GHz. The absorber prepared using flaky CIP has homogenous, dense structure and has excellent mechanical properties.

Investigation of a Microwave Absorbing Material Based on NBR

2017 ◽  
Vol 893 ◽  
pp. 49-52 ◽  
Author(s):  
Yong Qing Yang
Keyword(s):  
Reflection Loss ◽  
Microwave Absorber ◽  
Minimum Loss ◽  
Absorbing Material ◽  
Microwave Absorbing

The microwave absorbing rubber was prepared by adding the microwave absorber PPy/Ni/NanoG and other additives into NBR rubber. By analysis, the proper contents of N330, DOP and PPy/Ni/NanoG are 60, 10 and 25, respectively. The reflection loss of the rubber is below-10 dB at 8.2~11.4 GHz and the minimum loss value is-14.58 dB at 9.76 GHz.

Effects of CO2 and H2O on coal pyrolysis with the ultrafast heating rate in a concentrating photothermal reactor

2021 ◽  
Author(s):  
Chi Huanying ◽  
Li Hanjian ◽  
Su Sheng ◽  
Abdulmajid Abdullahi Shagali ◽  
An Xiaoxue ◽  
...  
Keyword(s):  
Heating Rate ◽  
Coal Pyrolysis

Effects of Zn on Pyrolysis Characteristics of Shenhua Lignite

2014 ◽  
Vol 1008-1009 ◽  
pp. 247-251
Author(s):  
Wipawan Sangsanga ◽  
Chuan Na ◽  
Jin Xiao Dou ◽  
Jiang Long Yu
Keyword(s):  
Pyrolysis Temperature ◽  
Fixed Bed ◽  
Coal Pyrolysis ◽  
Pyrolysis Gas ◽  
Gaseous Products ◽  
Pyrolysis Characteristics ◽  
Maximum Value ◽  
Product Gas ◽  
Zn Content ◽  
Catalytic Effects

The catalytic effects of Zn on the release of the gaseous products during pyrolysis of Shenhua lignite was investigated by using a fixed-bed quartz reactor. The product gas compositions from the coal pyrolysis were analyzed by a gas chromatography (GC). Experimental results show that Zn had noticeable catalytic effects on lignite pyrolysis. With the increase in Zn content, lignite weight loss increases during pyrolysis. However, there was an optimum content for amount Zn into the coal. Pyrolysis temperature had a great impact on the composition of pyrolysis gas. As the pyrolysis temperature increased, char yield decreased and gas yield increased. There existed a temperature that tar yield reached its maximum value.

scholarly journals Ti3C2MXene: a promising microwave absorbing material

RSC Advances ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 2398-2403 ◽  
Author(s):  
Wanlin Feng ◽  
Heng Luo ◽  
Yu Wang ◽  
Sifan Zeng ◽  
Lianwen Deng ◽  
...  
Keyword(s):  
Absorbing Material ◽  
Microwave Absorbing

A novel microwave absorbing material with Ti3C2MXene nanosheets.

scholarly journals Preparation and characterization of doubly substituted microwave absorbing material by sol-gel technique for super high frequency applications

2018 ◽  
Vol 28 (4) ◽  
pp. 478-482 ◽  
Author(s):  
Imran Sadiq ◽  
Shahzad Naseem ◽  
Saira Riaz ◽  
S. Sajjad Hussain ◽  
Muhammad Naeem Ashiq ◽  
...  
Keyword(s):  
High Frequency ◽  
Sol Gel ◽  
Absorbing Material ◽  
Gel Technique ◽  
Microwave Absorbing ◽  
Super High Frequency
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