Characterization of Slow Pyrolysis Biochars: Effects of Feedstocks and Pyrolysis Temperature on Biochar Properties

Pyrolysis and gasification have gradually become the main means to dispose of automobile shredder residue (ASR), since these methods can reduce the volume and quality of landfill with lower cost and energy recovery can be conducted simultaneously. As the ASR pyrolysis process is integrated, the results of pyrolysis reactions of organic components and the interaction among polymeric components can be clarified by co-pyrolysis thermogravimetric experiments. The results show that the decomposition mechanisms of textiles and foam are markedly changed by plastic in the co-pyrolysis process, but the effect is not large for rubber and leather. This effect is mainly reflected in the pyrolysis temperature and pyrolysis rate. The pyrolytic trend and conversion curve shape of the studied ASR can be predicted by the main polymeric components with a parallel superposition model. The pyrolytic product yields and characterizations of gaseous products were analyzed in laboratory-scale non-isothermal pyrolysis experiments at finished temperatures of 500 °C, 600 °C, and 700 °C. The results prove that the yields of pyrolytic gas products are determined by the thermal decomposition of organic substances in the ASR and final temperature.

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Slow Pyrolysis Temperature and Duration Effects on Fuel Properties of Food Rice Waste Bio-Char

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.797.319 ◽

2019 ◽

Vol 797 ◽

pp. 319-326 ◽

Cited By ~ 1

Author(s):

Normadyzah Ahmad ◽

Nurul Nabila Huda Baharudin ◽

Norhayati Talib

Keyword(s):

Energy Density ◽

Moisture Content ◽

Carbon Content ◽

Pyrolysis Temperature ◽

Fuel Properties ◽

High Moisture ◽

Promising Alternative ◽

Slow Pyrolysis ◽

Cooked Rice ◽

Effects Of Temperature

In this study, to convert high moisture content waste into bio-char, slow pyrolysis of cooked rice waste was proposed. The effects of temperature and duration of slow pyrolysis of cooked rice waste on the fuel properties of the biochar produced were investigated, namely the carbon content and energy density. The cooked rice waste was dried overnight at 80°C prior to pyrolysis to reduce moisture content. The carbon content was measured by using Thermo Finnigan Flash EA 1112 Series Elemental Analyser CHNS-O. Energy density was measured by using IKA Works C—5000 Control bomb calorimeter. Results demonstrated that pyrolysed rice waste at 250°C and 4 hour duration had the highest carbon content (60.30%). Moreover, the calorific values for pyrolysed cooked rice wastes demonstrated that biochar derived from cooked rice waste could be a promising alternative renewable energy source.

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Process Optimization of Preparation and Performance Characterization of Oily Sludge-Based Adsorbent Material by Pyrolysis

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.79-82.1971 ◽

2009 ◽

Vol 79-82 ◽

pp. 1971-1974

Author(s):

Guang Ying Zhang ◽

Ying Fei Hou ◽

Chun Hu Li ◽

Wei Zhu ◽

Jian Zhang

Keyword(s):

Heating Rate ◽

Flue Gas ◽

Pyrolysis Temperature ◽

Influencing Factor ◽

Nitrogen Atmosphere ◽

Flue Gas Desulfurization ◽

Oily Sludge ◽

Breakthrough Time ◽

And Performance

The oily sludge-based adsorbents for flue gas desulfurization were prepared by pyrolysis. Based on benzene adsorptivity, the conditions of pyrolysis process were optimized. The optimum prepared conditions of adsorbent material were in nitrogen atmosphere and 550°C, 4h, 10°C/min for the pyrolysis temperature, pyrolysis time and heating rate, respectively. In this case, the maximum benzene adsorbability was 60.12mg/g. Moreover, the main influencing factor was pyrolysis temperature, secondly was pyrolysis time and finally was heating rate. The sludge-based adsorbents were appropriate for flue gas desulfurization. The sulfur capacity of adsorbents via a flue gas desulfurization test after subsequent processing was about 3% and breakthrough time could keep to 109 min.

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