Investigation on the co-pyrolysis mechanism of seaweed and rice husk with multi-method comprehensive study

Xu, Shimei; Hu, Yamin; Wang, Shuang; He, Zhixia; Qian, Lili; Feng, Yongqiang; Sun, Chaoqun; Wang, Qian; Hui, Chi‐Wai; Payne, Emmanuel Kobina

doi:10.1016/j.renene.2018.08.002

Cited by 35 publications

(8 citation statements)

References 42 publications

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“…One study on using cellulose and polyethylene was found to lead to CH formation leading to an improvement in fuel products; further studies on molecular dynamic simulation and density functional theory enhanced the production of fuels of high quality [ 32 ]. One study used a multi-technology approach to understand the synergistic effects of co-pyrolysis of seaweed and rice husk and concluded that deoxidization effects changed the products distribution [ 33 ]. Reaction force field simulation studies have also enabled a better understanding of the interactions in co-pyrolysis to be achieved; a study revealed synergistic effects between rice husk and oily sludge (due to the presence of hydroxyl and hydrogen radicals) with reduced activation energy, even contributing to a difference in product distribution [ 34 ].…”

Section: Co-pyrolysis and Potential Chars For Water Treatmentmentioning

confidence: 99%

A review of prospects and current scenarios of biomass co-pyrolysis for water treatment

Zuhara

Mackey

Al‐Ansari

et al. 2022

Biomass Conv. Bioref.

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With ever-growing population comes an increase in waste and wastewater generated. There is ongoing research to not only reduce the waste but also to increase its value commercially. One method is pyrolysis, a process that converts wastes, at temperatures usually above 300 °C in a pyrolysis unit, to carbon-rich biochars among with other useful products. These chars are known to be beneficial as they can be used for water treatment applications; certain studies also reveal improvements in the biochar quality especially on the surface area and pore volume by imparting thermal and chemical activation methods, which eventually improves the uptake of pollutants during the removal of inorganic and organic contaminants in water. Research based on single waste valorisation into biochar applications for water treatment has been extended and applied to the pyrolysis of two or more feedstocks, termed co-pyrolysis, and its implementation for water treatment. The co-pyrolysis research mainly covers activation, applications, predictive calculations, and modelling studies, including isotherm, kinetic, and thermodynamic adsorption analyses. This paper focuses on the copyrolysis biochar production studies for activated adsorbents, adsorption mechanisms, pollutant removal capacities, regeneration, and real water treatment studies to understand the implementation of these co-pyrolyzed chars in water treatment applications. Finally, some prospects to identify the future progress and opportunities in this area of research are also described. This review provides a way to manage solid waste in a sustainable manner, while developing materials that can be utilized for water treatment, providing a double target approach to pollution management.

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Section: Co-pyrolysis and Potential Chars For Water Treatmentmentioning

confidence: 99%

A review of prospects and current scenarios of biomass co-pyrolysis for water treatment

Zuhara

Mackey

Al‐Ansari

et al. 2022

Biomass Conv. Bioref.

View full text Add to dashboard Cite

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“…Some authors have studied the thermal characterization of rice husks and their behavior during combustion through several techniques [ 7 , 8 , 9 ]. On the other hand, other thermal processes, such as the pyrolysis of this by-product, have been studied by other researchers [ 3 , 10 , 11 ]. Gasification processes as a method for thermal use of rice husks was also investigated [ 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Thermal Study and Emission Characteristics of Rice Husk Using TG-MS

et al. 2021

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Rice husks are a by-product that is generated in large quantities in Spain. However, they are not used efficiently. One of their possible applications is its thermal use in power generation equipment. For that purpose, it is important to know the characteristics of rice husks and their thermal behavior, as well as their possible pollutant emission to the atmosphere with respect to its thermal use as a biofuel. In this work, the thermal characteristics of rice husks and their thermal behavior were studied by using thermogravimetry and mass spectroscopy for two different atmospheres (oxidizing and inert). This way, the thermal profiles and the main characteristics were studied, as well as the emission of possible pollutants to the atmosphere, such as CO2, CH4, NO2, NH3, SO2, and H2S. Moreover, three different methods (FWO, KAS, and Starink) were used to carry out a thermal analysis, in order to obtain the main thermal parameters such as activation energy. The results of the analysis predicted that rice husks could be used as biofuel in industrial thermal equipment based on its acceptable calorific value, good thermal characteristics, and low gas emissions both in oxidizing and inert atmosphere (although they have a high ash content).

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“…at different mass ratios, which showed that the co‐pyrolysis technology could induce the bio‐oil production when the mass ratio was 1:1, and the acetic acid, O‐containing substances, and the content of the N‐containing compound was greatly reduced. The terrestrial biomass (rice husk) and seaweed were co‐pyrolyzed, and the result demonstrated qualities of liquid and solid products were all improved . The co‐pyrolysis behavior of green microalgae and one kind of low‐rank coals was investigated, and results showed that there were a synergistic coupling effect between them and the activation energy was decreased.…”

Section: Introductionmentioning

confidence: 99%

“…The terrestrial biomass (rice husk) and seaweed were co-pyrolyzed, and the result demonstrated qualities of liquid and solid products were all improved. 16 The co-pyrolysis behavior of green microalgae and one kind of low-rank coals was investigated, 17 and results showed that there were a synergistic coupling effect between them and the activation energy was decreased. Nevertheless, the quality of produced bio-oils is still not high enough to directly use at present.…”

Section: Introductionmentioning

confidence: 99%

Co‐pyrolysis characteristics of polysaccharides‐cellulose and the co‐pyrolyzed compound distributions over two kinds of zeolite catalysts

et al. 2020

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Summary Co‐pyrolysis characteristics of soluble polysaccharides‐cellulose were investigated through thermogravimetric analysis (TGA), kinetic analysis, analytical pyrolyser coupled with gas chromatograph‐mass spectrometer (Py‐GC/MS) and subsequent density functional theory (DFT). Results from TGA and differential thermogravimetric analysis (DTG) analyses indicated that there were synergistic effects in the polysaccharides‐cellulose (PS‐CE) blends pyrolysis process. Surprisingly in co‐pyrolysis process from Py‐GC/MS analysis, the furans were suppressed, while the anhydrosugars were increased. The DFT calculation showed that free radicals pyrolyzed from soluble polysaccharides could suppress the ring‐opening reaction of D‐glucopyranose. The co‐pyrolyzed chemical compound distribution over the catalysts (MCM‐41, ZSM‐5 and their mixtures) was also detected through Py‐GC/MS analysis. Both the zeolites showed high selectivity for 5‐methyl‐2‐furaldehyde and 2‐furaldehyde. The two kinds of zeolites could induce the generation of furans but suppress the production of anhydrosugars, which was the opposite effect of the co‐pyrolysis of PS‐CE.

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Investigation on the co-pyrolysis mechanism of seaweed and rice husk with multi-method comprehensive study

Cited by 35 publications

References 42 publications

A review of prospects and current scenarios of biomass co-pyrolysis for water treatment

A review of prospects and current scenarios of biomass co-pyrolysis for water treatment

Thermal Study and Emission Characteristics of Rice Husk Using TG-MS

Co‐pyrolysis characteristics of polysaccharides‐cellulose and the co‐pyrolyzed compound distributions over two kinds of zeolite catalysts

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