Products and pathway analysis of rice straw and chlorella vulgaris by microwave-assisted co-pyrolysis

Wei, Dening; Chen, Chunxiang; Huang, Xiaodong; Zhao, Jian; Fan, Dianzhan; Zeng, Tianyang; Bi, Yingxing

doi:10.1016/j.joei.2023.101182

Cited by 19 publications

(5 citation statements)

References 69 publications

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“…The interactions between P and C promoted the production of phenols, possibly caused by the intensified cracking of phenyl-substituted amino acids and dehydration of cellulose . In PL, the interactions enhanced the cracking of amino acids and lipids (triglycerides), leading to the production of more acids (such as 11.2% n -hexadecanoic acid), phenols, and alcohols . However, the generation of esters was hindered due to the formation of amides.…”

Section: Resultsmentioning

confidence: 99%

“…To quantitatively assess the interaction effects between the components, the synergistic extent ( S ) − was introduced and described as the following formulas V th = V A R A + V B R B S 0.25em ( % ) = [ false( V ex − V th false) / V th ] × 100 % where V th represents the theoretical value. V A and V B represent the experimental values (such as biochar yield and relative content of amides) obtained from the individual pyrolysis of A and B, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…24 In PL, the interactions enhanced the cracking of amino acids and lipids (triglycerides), leading to the production of more acids (such as 11.2% n-hexadecanoic acid), phenols, and alcohols. 32 However, the generation of esters was hindered due to the formation of amides. Moreover, the cracking of triglycerides was also enhanced in CL, resulting in the generation of a significant amount of long-chain fatty acids, such as nhexadecanoic acid (42.49%), oleic acid (6.03%), and octadecanoic acid (3.75%).…”

mentioning

confidence: 99%

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Interaction Effects between the Main Components of Protein-Rich Biomass during Microwave-Assisted Pyrolysis

Hou,

Zhou,

et al. 2024

Environ. Sci. Technol.

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The interaction effects between the main components (proteins (P), carbohydrates (C), and lipids (L)) of proteinrich biomass during microwave-assisted pyrolysis were investigated in depth with an exploration of individual pyrolysis and copyrolysis (PC, PL, and CL) of model compounds. The average heating rate of P was higher than those of C and L, and the interactions in all copyrolysis groups reduced the max instant heating rate. The synergistic extent (S) of PC and PL for bio-oil yield was 16.78 and 18.24%, respectively, indicating that the interactions promoted the production of bio-oil. Besides, all of the copyrolysis groups exhibited a synergistic effect on biochar production (S = 19.43− 28.24%), while inhibiting the gas generation, with S ranging from −20.17 to −6.09%. Regarding the gaseous products, apart from H 2 , P, C, and L primarily generated CO 2 , CO, and CH 4 , respectively. Regarding bio-oil composition, the interactions occurring within PC, PL, and CL exhibited a significantly synergistic effect (S = 47.81−412.96%) on the formation of N-heterocyclics/amides, amides/nitriles, and acids/esters, respectively. Finally, the favorable applicability of the proposed interaction effects was verified with microalgae. This study offers valuable insights for understanding the microwave-assisted pyrolysis of protein-rich biomass, laying the groundwork for further research and process optimization.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Interaction Effects between the Main Components of Protein-Rich Biomass during Microwave-Assisted Pyrolysis

Hou,

Zhou,

et al. 2024

Environ. Sci. Technol.

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“…Co-pyrolysis of microalgal biomass with other types of biomasses may improve product yields and enhance the formation of desirable chemical compounds [4]. For example, microwave co-pyrolysis of 70 wt% CV and 30 wt% rice straw (RS) produced higher bio-oil yield (19.2 wt%) than the individual pyrolysis of microalgal biomass (15.17 wt%) and RS (13.5 wt%) [69]. Yet, pyrolysis of a mixture containing equal amounts of CV and RS resulted in only 17.1 wt% bio-oil yield.…”

Section: Pyrolysismentioning

confidence: 99%

Algae: Nature’s Renewable Resource for Fuels and Chemicals

Chakraborty,

Dunford

2024

Biomass

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Microalgae-based renewable energy, industrial chemicals, and food have received great attention during the last decade. This review article highlights the versatility of algal biomass as a feedstock for producing various commodities and high-value products, including aromatic hydrocarbons and lipids within biorefinery systems. Lipid content and the composition of algal biomass cultivated in various media, specifically in wastewater streams generated at agricultural and industrial production facilities, are reviewed. Technical and chemical aspects of algal biomass conversion via thermochemical techniques including pyrolysis, hydrothermal liquefaction, and hydrothermal carbonization are discussed. The properties of the final products are reviewed based on the conversion process employed. Studies published within the last 5 years are reviewed. The importance of further research on inexpensive and more effective catalysts and the development of downstream processes to upgrade crude products obtained from thermal conversion processes is emphasized. This review concludes with an in-depth discussion of the opportunities and challenges involved in algal biomass-based bioproduct manufacturing and commercialization.

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“…Because of the prominent advantages of microwave heating, it is broadly applied in pyrolysis technique. Microwave-assisted pyrolysis (MAP) is one of the most attractive thermochemical processing methods [43,44] where high conversion efficiency [45,46] and low energy consumption [47] can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Efficient Heating of Activated Carbon in Microwave Field

Shi

et al. 2023

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Activated carbon (AC) is widely utilized in water treatment, gas adsorption, and purification as well as the protection of environment due to the characteristics of prominent catalytic and adsorbent effect. The heating performances are therefore of significant importance for the further applications. The main objective of this study was therefore to detail the heating performance of activated carbon in microwave field, and the factors affecting the heating performance were also explored. In this study, the heating performance of AC as affected by microwave power (400, 450, 500, 550, and 600 W), feeding load (5, 10, 15, 20, and 25 g), and reactor volume (50, 100, 150, 200, and 250 mL) were detailed and reported. The results showed that when the microwave powers were 400, 450, 500, 550, and 600 W, the temperatures of AC increased to the desired value (about 200 °C) within 90, 85, 70, 60, and 35 s with average heating rates of 2.0, 2.2, 2.8, 3.0, and 5.9 °C/s, respectively. When the feeding loads were 5, 10, 15, 20, and 25 g, the temperatures of AC increased to desired temperature within 40, 70, 60, 50, and 50 s with average heating rates of 4.2, 2.8, 3.1, 3.50, and 3.55 °C/s, respectively. When the reactor volumes were 50, 100, 150, 200, and 250 mL, the temperatures of AC increased to the desired temperature within 25, 60, 70, 70, and 160 s with average heating rates of 7.6, 3.3, 2.8, 2.6, and 1.2 °C/s, respectively. In general, the faster heating rate of activated carbon was achieved at higher microwave power, more feeding load, and smaller reactor volume. Fitting formulae were given to predict the transient temperatures of AC in the microwave field, and the relative errors were in the ranges of −15.4~12.4%, −15.4~13.5% and −18.7~12.4% at different microwave powers, feeding loads, and reactor volumes, respectively.

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Products and pathway analysis of rice straw and chlorella vulgaris by microwave-assisted co-pyrolysis

Cited by 19 publications

References 69 publications

Interaction Effects between the Main Components of Protein-Rich Biomass during Microwave-Assisted Pyrolysis

Interaction Effects between the Main Components of Protein-Rich Biomass during Microwave-Assisted Pyrolysis

Algae: Nature’s Renewable Resource for Fuels and Chemicals

Efficient Heating of Activated Carbon in Microwave Field

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