Co-pyrolysis of low-grade bituminous coal and algal biomass in a rotary kiln: Effect of coal/algae ratio and kiln temperature on the yield and composition of the resultant oils

Nyoni, Bothwell; Hlangothi, Shanganyane Percy

doi:10.1016/j.jaap.2023.105950

Cited by 15 publications

(3 citation statements)

References 30 publications

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“…The experimental value of pyrolytic carbon yield in pyrolysis products is less than the theoretical value, the experimental value of pyrolytic oil is significantly greater than the theoretical value, and the experimental value of gas phase product is slightly less than the theoretical value. The results show that the co-pyrolysis of coal and biomass at the ratio of 1:3 achieves the highest yield of pyrolysis oil [33].…”

Section: Optimal Raw Materials Ratiomentioning

confidence: 96%

Study on Co-Pyrolysis of Coal and Biomass and Process Simulation Optimization

Wang,

Liu,

Wang

et al. 2023

Sustainability

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In this paper, the optimal process conditions for coal–biomass co-pyrolysis were obtained through pyrolysis experiments. The results show that under the condition of the pyrolysis temperature of 500 °C, the pyrolysis oil yield and positive synergistic effect reach the maximum, and the ratio of coal to biomass raw materials is 1:3. The effects of three loading methods (coal loading on biomass, biomass loading on coal, and coal–biomass mixing) on the distribution of simulated products of coal–biomass co-pyrolysis were constructed using Aspen Plus V11 software. The experimental results of pyrolysis carbon, pyrolysis oil, pyrolysis gas, and water under three different ratios are close to the simulation results, and the maximum error is 8%. This indicates that the model is dependent. This paper analyzes the economic situation in terms of investment in factory construction, raw material collection, product production, and product sales. The results show that when the processing scale is 9 tons h−1, the pyrolysis plant can be profitable in the first year. This study provides basic data and the basis for the commercialization investment of coal–biomass co-pyrolysis technology.

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Section: Optimal Raw Materials Ratiomentioning

confidence: 96%

Study on Co-Pyrolysis of Coal and Biomass and Process Simulation Optimization

Wang,

Liu,

Wang

et al. 2023

Sustainability

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“…In order to further improve the tar yield during coal pyrolysis, some scholars proposed the theory of dissociation of noncovalent and weakly covalent bonds in the coal structure, which suggests that the free radicals can be secondary reacted through polymerization and recombination after they are produced, and these reactions can help to increase the tar yield and quality and reduce the asphaltene reaction [10]. Some scholars injected hydrogen during the pyrolysis reaction to obtain more hydrogen radicals at high temperatures and reduced the polymerization reaction between macromolecular radicals by stabilizing these radicals, thus achieving the purpose of improving tar quality [11]. It has also been pointed out that the proportion of sulfur and nitrogen in semi-coke after hydrogen pyrolysis has been reduced considerably, i.e., the pollution of the environment caused by semi-coke in the process of secondary utilization has been reduced [12].…”

Section: Related Workmentioning

confidence: 99%

Application of Ni/MgO catalysts in the pyrolysis of bituminous coal

Zheng,

Wang,

et al. 2024

Applied Mathematics and Nonlinear Sciences

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Carbon pyrolysis is one of the essential ways to improve carbon energy utilization and reduce environmental pollution. The main product of carbon pyrolysis process is tar, and improving tar yield can not only increase the resource utilization efficiency, but also reduce the pollution to the environment. Therefore, this paper investigates the application of Ni/MgO catalyst in the pyrolysis process of bituminous coal. The experimental results show that Ni/MgO catalyst can effectively activate small molecule radicals and make them combine with prominent molecule radicals stably to improve the tar yield. Meanwhile, when it is under the pyrolysis gas environment, pyrolysis temperature reaches 570 ℃, gas flow rate is 375 ml/min, and the catalyst is selected to be filled in the upper layer, the activation effect of Ni/MgO catalyst is more prominent, and it can significantly increase the tar yield and the proportion of light oil. Ni/MgO catalyst had the best effect in tar yield increase compared to other catalysts, but the performance was average in fair oil percentage increase. The catalyst could also reduce the number of aliphatics in the tar and increase the proportion of non-aliphatics, improving the tar quality.

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“…In this regard, bioenergy can be considered as an effective solution to the global energy problem, as well as a promising approach to improving the environmental situation. However, a large-scale transition to bioenergy is still associated with a number of limitations, such as low energy density per unit volume of biomass [1,2], difficulties in transportation and poor storage stability of biomass [3], and potential competition for land area in the production of food and other types of agricultural products [4]. Therefore, among the modern tasks of renewable energy, the search for the most effective types of biomass and technologies for its integrated use for producing fuel and energy is relevant.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of Laminaria japonica with biochar production and its characteristics

Tsvetkov,

Zaichenko,

Podlesniy

et al. 2024

E3S Web Conf.

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In the present paper, biochar from the Laminaria japonica from brackish lagoons (Sea of Okhotsk, Sakhalin Island) was obtained by a stepwise pyrolysis at 500 °C. The properties of concerned biochar (elemental composition, specific surface area, particle size distribution) were studied. It was shown that the Laminaria japonica biochar has 0.2–18 μm particle sizes with a complex branched surface of high microporosity and a specific surface area of 38.6 m2g-1. Aforementioned biochar has the high content of carbon (~60 at%) and high content of oxygen (~34 at.%).

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Co-pyrolysis of low-grade bituminous coal and algal biomass in a rotary kiln: Effect of coal/algae ratio and kiln temperature on the yield and composition of the resultant oils

Cited by 15 publications

References 30 publications

Study on Co-Pyrolysis of Coal and Biomass and Process Simulation Optimization

Study on Co-Pyrolysis of Coal and Biomass and Process Simulation Optimization

Application of Ni/MgO catalysts in the pyrolysis of bituminous coal

Pyrolysis of Laminaria japonica with biochar production and its characteristics

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