scholarly journals Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 759
Author(s):  
Ivan Kojić ◽  
Achim Bechtel ◽  
Nikoleta Aleksić ◽  
Dragana Životić ◽  
Snežana Trifunović ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
Plastic Material ◽  
Isotope Analysis ◽  
Synergetic Effect ◽  
High Density ◽  
Low Rank ◽  
Gas Chromatography Mass Spectrometry ◽  
Low Rank Coal ◽  
Simultaneous Treatment ◽  
Pyrolysis Products

The mutual impact of low-quality lignite and high-density polyethylene (HDPE) during open system pyrolysis was investigated, aiming to improve utilization of lignite with simultaneous treatment of HDPE waste. Pyrolysis of lignite, HDPE, and their mixture (mass ratio, 1:1) was performed at temperatures 400, 450, 500, 550, and 600 °C. Initial substrates and pyrolysis products were characterized by thermogravimetric analysis (TGA), gas chromatography–mass spectrometry (GC–MS), specific carbon isotope analysis of individual hydrocarbons (δ13C), Rock-Eval pyrolysis, and elemental analysis. The positive synergetic effect during co-pyrolysis of lignite/HDPE mixture was observed at temperatures ≥450 °C, with the greatest being at 500 °C. The highest yield of liquid co-pyrolysis products with a similar composition to that of crude oils is also noticed at 500 °C. The yields of liquid and gaseous products and quality of pyrolytic products obtained by co-pyrolysis of lignite/HDPE mixture are notably improved compared with pyrolysis of lignite alone. On the other hand, data obtained from pyrolysis of HDPE alone indicate that it cannot be concurrent to well-developed catalytic thermal processes for polymer recycling. However, concerning the huge amount of produced HDPE, at least part of this plastic material can be reused for advanced thermal treatment of lignite, particularly in countries where this low-rank coal represents the main source of energy.

Comparative Study on Microwave Co-Pyrolysis Products of Low Rank Coal in CO2 and N2 Atmosphere

2014 ◽  
Vol 1033-1034 ◽  
pp. 142-145
Author(s):  
Jun Zhou ◽  
Zhe Yang ◽  
Wen Zhi Shang ◽  
Qiu Li Zhang ◽  
Yong Hui Song ◽  
...  
Keyword(s):  
Comparative Study ◽  
Functional Groups ◽  
Low Rank ◽  
Gas Chromatography Mass Spectrometry ◽  
Lower Content ◽  
Low Rank Coal ◽  
Fixed Carbon ◽  
Pyrolysis Products ◽  
Liquid Products ◽  
New Research

Microwave pyrolysis of coal is a new research method for deeply processing of low rank coal. This paper conducted comparative study on microwave co-pyrolysis products of low rank coal in CO2 and N2 atmosphere. The composition and content of tar and bluecoke were analyzed by gas chromatography-mass spectrometry and FTIR spectroscopy. The results showed that the yields of liquid products in CO2 and N2 atmosphere were 20.6% and 18.0% respectively, and the yields of bluecoke were 62.0% and 65.8%. Bluecoke obtained from CO2 pyrolysis atmosphere had the lower content of fixed carbon and oxygenic functional groups, but the higher content of volatile. There was the lower content of aromatic hydrocarbons and the higher content of oxygenic functional groups in the tar produced in CO2 pyrolysis atmosphere due to CO2 gasification effect.

The enhanced rich H2 from co-gasification of torrefied biomass and low rank coal: The comparison of dry/wet torrefaction, synergetic effect and prediction

Fuel ◽  
2021 ◽  
Vol 287 ◽  
pp. 119473
Author(s):  
Zhen He ◽  
Yan Sun ◽  
Shuchao Cheng ◽  
Zhiwen Jia ◽  
Ren Tu ◽  
...  
Keyword(s):  
Synergetic Effect ◽  
Low Rank ◽  
Low Rank Coal ◽  
Torrefied Biomass

Research on the Microwave Pyrolysis of Coal under N2 Atmosphere

2014 ◽  
Vol 672-674 ◽  
pp. 672-675
Author(s):  
Jun Zhou ◽  
Zhe Yang ◽  
Wen Zhi Shang ◽  
Yong Hui Song ◽  
Xin Zhe Lan
Keyword(s):  
Flow Rate ◽  
Microwave Power ◽  
Loss Rate ◽  
New Technology ◽  
Low Rank ◽  
Low Rank Coal ◽  
Weight Loss Rate ◽  
Pyrolysis Products ◽  
Microwave Pyrolysis ◽  
Liquid Products

Microwave pyrolysis of low rank coal is a new technology of cleaner production. The effect of microwave power and flow rate of N2 on the yield of pyrolysis products under N2 atmosphere was explored. The results showed that the higher microwave power was, the higher all the terminal temperature, the yield of liquid products and the weight loss rate were. The flow rate of N2 had little influence on the yield of pyrolysis solid products, while it exerted a greater influence on the yield of pyrolysis liquid products. When the low rank coal was pyrolysised under the conditions of microwave power of 800W and flow rate of N2 of 4.0×10-4 m3/min, the yield of Bluecoke and liquid products respectively reached 65.8% and 18%.

Influence of Fe2 O3 /CaO Catalysts on the Pyrolysis Products of Low-Rank Coal

2015 ◽  
Vol 3 (10) ◽  
pp. 1068-1071 ◽  
Author(s):  
Xiaohan Cheng ◽  
Xuanming He ◽  
Cheng Chen ◽  
Shuang Yi
Keyword(s):  
Low Rank ◽  
Low Rank Coal ◽  
Pyrolysis Products

scholarly journals Study of pyrolysis of high density polyethylene in the open system and estimation of its capability for co-pyrolysis with lignite

2018 ◽  
Vol 83 (7-8) ◽  
pp. 923-940
Author(s):  
Ivan Kojic ◽  
Achim Bechtel ◽  
Friedrich Kittinger ◽  
Nikola Stevanovic ◽  
Marko Obradovic ◽  
...  
Keyword(s):  
Open System ◽  
High Density Polyethylene ◽  
Synergetic Effect ◽  
Polar Compounds ◽  
High Density ◽  
Feed Stream ◽  
Gaseous Products ◽  
Liquid Products ◽  
Plastic Bag ◽  
Pre Treatment

Pyrolysis of high density polyethylene (HDPE) in the open system was studied. A plastic bag for food packing was used as a source of HDPE. Pyrolysis was performed at temperatures of 400, 450 and 500?C, which were chosen based on thermogravimetric analysis. The HDPE pyrolysis yielded liquid, gaseous and solid products. Temperature rise resulted in the increase of conversion of HDPE into liquid and gaseous products. The main constituents of liquid pyrolysates are 1-n-alkenes, n-alkanes and terminal n-dienes. The composition of liquid products indicates that the performed pyrolysis of HDPE could not serve as a standalone operation for the production of gasoline or diesel, but preferably as a pre-treatment to yield a product to be blended into a refinery or petrochemical feed stream. The advantage of a liquid pyrolysate in comparison to crude oil is the extremely low content of aromatic hydrocarbons and the absence of polar compounds. The gaseous products have desirable composition and consist mainly of methane and ethene. The solid residues do not produce ash by combustion and have high calorific values. Co-pyrolysis of HDPE with mineral-rich lignite indicated positive synergetic effect at 450 and 500?C, which is reflected through the increased experimental yields of liquid and gaseous products in comparison to theoretical ones.

A Research on Microwave and Conventional Pyrolysis for Low Rank Coal

2014 ◽  
Vol 1044-1045 ◽  
pp. 209-214
Author(s):  
Yong Hui Song ◽  
Xin Li ◽  
Jun Wei Shi ◽  
Xin Zhe Lan
Keyword(s):  
Aromatic Hydrocarbon ◽  
Phenolic Compound ◽  
Gas Analysis ◽  
Low Rank ◽  
Western China ◽  
Low Rank Coal ◽  
Pyrolysis Products ◽  
Microwave Pyrolysis ◽  
Pyrolysis Tar ◽  
Conventional Pyrolysis

In this paper, conventional pyrolysis (CP) and microwave pyrolysis (MWP) for three types of low rank coal in western China was studied. The effects of pyrolysis methods and temperature etc on product yields were also discussed. Pyrolysis products were characterized by IR, Gas analysis meter and GC-MS. Results showed that the tar and gas yields in microwave pyrolysis is about 3%-5% higher than those in the conventional pyrolysis. H2 and CO proportions in gas are above 55%. The contents of benzene, aromatic hydrocarbon and phenolic compound in microwave pyrolysis tar are higher than those in the conventional pyrolysis, in addition, C5~C10 substance content in tar is about 5 times as that in the conventional, so the microwave pyrolysis can prompt tar converting to light fraction.

scholarly journals The Effect of Water Cement Ratio on Cement Brick Containing High Density Polyethylene (HDPE) as Sand Replacement

2018 ◽  
Vol 150 ◽  
pp. 03010
Author(s):  
Noorwirdawati Ali ◽  
Nor Fazlin Mohd Yusup ◽  
Faisal Sheikh Khalid ◽  
Shahiron Shahidan ◽  
Siti Radziah Abdullah
Keyword(s):  
Compressive Strength ◽  
Environmental Pollution ◽  
Waste Disposal ◽  
High Density Polyethylene ◽  
Plastic Material ◽  
High Density ◽  
Mix Design ◽  
Control Specimen ◽  
Cement Ratio ◽  
Water Cement Ratio

Waste disposal can contribute to the problem of environmental pollution. Most of the waste material is plastic based, because the nature of difficult of plastic degradable by itself. In order to overcome the problem, many study has been conducted on the reuse of plastic material into various field such as civil engineering and construction. In this study, municipal solid waste (MSW) in the form of High Density Polyethylene (HDPE) plastic was used to replace sand in cement sand brick production. The HDPE used in this study was obtained from a recycle factory at Nilai, Negeri Sembilan. 3% of HDPE replacement was applied in this study, with the cement-sand mix design of 1:6 and water-cement ratio 0.35, 0.40, 0.45 and 0.50 respectively. All specimens were tested for compressive strength and water absorption at 7 and 28 days. The density of the bricks was also recorded. The finding show that brick with 3% HDPE content and 0.45 of water-cement ratio at 28 days of age curing show the highest compressive strength, which is 19.5N/mm2 compared to the control specimen of 14.4 N/mm2.

Sign in / Sign up

Export Citation Format

Share Document