Effect of CaO additive on co-pyrolysis behavior of bituminous coal and cow dung

Wang, Jiaofei; Ma, Meng; Bai, Yonghui; Su, Weiguang; Song, Xudong; Yu, Guangsuo

doi:10.1016/j.fuel.2019.116911

Cited by 43 publications

(15 citation statements)

References 40 publications

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“…In the co-pyrolysis process using CaO, there is cracking of liquid oil into gas products. This happens because CaO acts as a catalyst that decreases the activation energy and increases the reaction rate so that the reaction rate is faster and the cracking of liquid oil occurs (Wang et al 2020).…”

Section: The Influence Of the Mass Ratio Of Cao Catalyst To The Raw M...mentioning

confidence: 99%

“…Deacidification also impacts increasing the amount of hydrocarbons which is indicated by the increasing calorific value. Decreased phenol compounds can occur because of two possibilities, CaO can react with the acid functional groups in phenol, and CaO can catalyze the decomposition of phenol to produce CO (Wang et al 2020). Liquid oil is derived from hemicellulose, cellulose, and lignin decomposition.…”

Section: Chemical Characteristics Of Liquid Oilmentioning

confidence: 99%

“…Empty fruit bunch (EFB) is biomass with a higher H/C atom ratio compared to coal (Chang, 2018;Huang et al 2019). The hydrogen produced from the rapid pyrolysis of biomass stabilizes large radical structures generated during the early stages of coal pyrolysis (Wang et al 2020). Other researchers worked on the copyrolysis of coal and biomass.…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that the acid compounds in the liquid oil decreased while the ketones and hydrocarbons increased. CaO also has a catalytic role in the coal pyrolysis and promotes the release of volatiles (Wang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Co-Pyrolysis of Palm Oil Empty Fruit Bunch and Coal into Liquid Oil

Sunarno

Sari

Frimacia

et al. 2022

Int. J. Renew. Energy Dev.

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The decline in fossil fuel sources has prompted research into finding renewable fuels. Alternative energy sources that have high efficiency and environmentally friendly are producing liquid oil from palm oil empty fruit bunches (EFB) and coal. Pre-treatment of empty fruit bunches using NaOH and variations of concentrations of H2O2, variations of the ratio of EFB/coal, the ratio of CaO catalyst, chemical and physical characteristics were studied to produce the better liquid oil yield. The H2O2 concentration is 0%; 1%; 2%; 3%, the ratio of EFB/coal (R) is 0/100; 25/75; 50/50; 75/25, the ratio of catalyst CaO/raw material is 0%; 3%; 6%; 9%, and running at 400°C with 100 mL/minute nitrogen gas flowing during one hour. The results showed that the addition of sodium hydroxide and hydrogen peroxide in the EFB pretreatment will increase the yield of liquid oil. With an increase in the EFB/coal ratio, the yield of liquid oil increases. Catalytic co-pyrolysis of EFB and coal using calcium oxide catalysts could improve the quality of liquid oil products.

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Section: The Influence Of the Mass Ratio Of Cao Catalyst To The Raw M...mentioning

confidence: 99%

Section: Chemical Characteristics Of Liquid Oilmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Catalytic Co-Pyrolysis of Palm Oil Empty Fruit Bunch and Coal into Liquid Oil

Sunarno

Sari

Frimacia

et al. 2022

Int. J. Renew. Energy Dev.

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“…Meanwhile, it is difficult to transport and store because of some weaknesses like low mass and energy density and high moisture content of biomass 15,16 . Compared with biochemical treatment method, pyrolysis and gasification technology in thermochemical treatment method not only has a remarkable effect on solid waste management but also can obtain bio‐oil, solid carbon, and pyrolysis gas with high utilization value 17 . Through industrial production, the biomass of CM can then be converted into liquid or gaseous fuels with high energy density and are transported and stored conveniently 18,19 .…”

Section: Introductionmentioning

confidence: 99%

Thermal conversion behavior and nitrogen‐containing gas products evolution during co‐pyrolysis of cow manure and coal: A thermal gravimetric analyzer/differential scanning calorimetry–mass spectrometer investigation

Bai

Wang

et al. 2021

Asia-Pacific J Chem Eng

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The kinetics and thermal behaviors of cow manure (CM) and Meihuajing bituminous coal (MHJ) blending from room temperature to 950°C were investigated by thermal gravimetric analyzer (TGA) coupled with differential scanning calorimetry (DSC) and mass spectrometer (MS). TG curves show that the high heating rate accelerates thermal decomposition rate, and the position of differential thermal gravity (DTG) peaks shifts to a higher temperature. Owing to the heat transfer limitation phenomenon, the residual weight of CM is only 40.38% with the heating rate of 1°C/min in comparison with other heating rate. DSC takes more time to reach a steady state than TGA. Gaseous evolution curves of HCN and NH3 were obtained during the pyrolysis of blends based on TG–MS experiments. With the increased heating rate, the emissions increased a lot due to the secondary reaction of volatiles. The Eα of 1C1M obtained using Kissinger–Akahira–Sunose (KAS), Flynn–Wall–Ozawa (FWO), Friedman, and Kissinger methods is within 124.58–317.18, 121.97–321.11, 150.28–331.64, and 209.26 kJ/mol, respectively. The kinetic parameters calculated based on four model‐free kinetic modeling methods shows good agreement. And the thermodynamic parameters were obtained and discussed under different conversion rates. This work is greatly important to understand the co‐prolysis mechanism of CM and coal and to design the pyrolysis reactors.

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