Thermochemical liquefaction of pig manure: Factors influencing on oil

Wu, Qingdan; Wang, Hua; Zheng, Xiaochen; Fen, Liu; Wang, Andong; Zhang, Dongsheng; Yuan, Jinrui; Xiao, Zhihua

doi:10.1016/j.fuel.2019.116884

Cited by 32 publications

(15 citation statements)

References 52 publications

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“…Liquefaction is the splitting of the large molecules contained in the solid biomass into smaller, unstable, and highly reactive intermediates that repolymerize into oil compounds having a relatively high molecular weight. ,, Generally, liquefaction occurs in a given solvent as a medium at temperatures usually ranging from 200 to 350 °C, ,,,, pressure from 5 to 20 MPa, ,,, and with or without a catalyst, ,,,, which can convert the lipid, carbohydrate, fiber, and protein in algae feedstock into an energy densified material - CBO. It involves complicated reactions comprising solvolysis, dehydration, decarboxylation, hydrogenation, and polymerization of functional groups. ,, …”

Section: Hydrothermal Liquefaction Of Algaementioning

confidence: 99%

“…7 Bio-oil from algae could be upgraded into a number of fuels such as petrol, jet fuel, and diesel. 17,22 The carbon footprint of algae fuel is smaller than that of fossil fuels, and it is renewable, making it more ecofriendly.…”

Section: Introductionmentioning

confidence: 99%

“…In China, the 976 Program has financed large-scale projects that include energy generation from microalgae . Bio-oil from algae could be upgraded into a number of fuels such as petrol, jet fuel, and diesel. , The carbon footprint of algae fuel is smaller than that of fossil fuels, and it is renewable, making it more ecofriendly.…”

Section: Introductionmentioning

confidence: 99%

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Progress in Hydrothermal Liquefaction of Algal Biomass and Hydrothermal Upgrading of the Subsequent Crude Bio-Oil: A Mini Review

et al. 2020

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Algae biomass has recently attracted the attention of the green energy industry as a raw material for biofuels production. Their high-water content has led to the choice of hydrothermal liquefaction as a suitable way to convert them into biooil. From algae species to bio-oil as fuel, many steps are required, including the selection of algae species and process parameters (including catalysts), the liquefaction process, product separation, recovery of crude bio-oil, and subsequent upgrading (if the goal is to use the bio-oil as transportation fuel). This review gives some biochemical, elemental, and inorganic compositions of algae. The reaction mechanism of hydrothermal liquefaction is briefly described, with an emphasis on the influence of process parameters on the yield and quality of the crude bio-oil. The use of organic solvents as reaction media or for recovery of crude bio-oil from product mixtures is discussed. The research work on the catalytic hydrothermal upgrading of algae liquefied crude bio-oil in recent years is reviewed, and some conclusions are put forward. According to recent reports, there is a section devoted to the techno-economic analysis of the hydrothermal liquefaction process. Finally, the challenges that future research and new development strategies may face are proposed.

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Section: Hydrothermal Liquefaction Of Algaementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Progress in Hydrothermal Liquefaction of Algal Biomass and Hydrothermal Upgrading of the Subsequent Crude Bio-Oil: A Mini Review

et al. 2020

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“…The annual output of livestock manure in China has reached 3.8 billion tons, of which swine manure (SM) accounts for 38.3% [ 4 ]. At present, researchers have developed a series of technologies for the treatment/disposal of SM (a wet solid waste), mainly including composting [ 5 , 6 ], anaerobic digestion [ 7 , 8 ], hydrothermal carbonization (HTC) [ 9 , 10 , 11 ], pyrolysis [ 12 , 13 ], gasification [ 14 , 15 ], and liquefaction [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Speciation of Main Nutrients (N/P/K) in Hydrochars Produced from the Hydrothermal Carbonization of Swine Manure under Different Reaction Temperatures

et al. 2021

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Hydrothermal carbonization (HTC) has been proved to be a promising technology for swine manure (SM) treatment. Currently, there is a lack of systematic understanding of the transformation characteristics of nutrient speciation in the HTC of SM. In this study, the speciation of the main nutrients (N/P/K) in SM-derived hydrochar produced at different reaction temperatures (200–280 °C) was investigated. The recovery of P (61.0–67.1%) in hydrochars was significantly higher than that of N (23.0–39.8%) and K (25.5–30.0%), and the increase in reaction temperature promoted the recovery of P and reduced the recovery of N. After the HTC treatment, the percentage of soluble/available P was reduced from 61.6% in raw SM to 4.0–23.9% in hydrochars, while that of moderately labile/slow-release P was improved from 29.2% in raw SM feedstock to 65.5–82.7%. An obvious reduction was also found in the amounts of available N (from 51.3% in raw SM feedstock to 33.0–40.5% in hydrochars). The percentages of slow-release N and residual N in hydrochars produced at 240 °C reached the maximum and minimum values (46.4% and 18.9%), respectively. A total of 49.5–58.3% of K retained in hydrochars was residual (invalid) potassium. From the perspective of the mobility and availability of N, P and K only, it was suggested that the HTC of SM should be carried out at 220–240 °C. Compared with the original SM, it is safer and more effective to use the SM-derived hydrochar as an organic fertilizer.

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“…Nessa faixa de severidade ocorre a formação do bio-óleo e redução dos polissacarídeos em meio aquoso e fração sólida. (CHINNASAMY et al, 2010;DIMITRIADIS;BEZERGIANNI, 2017;GOLLAKOTA;KISHORE;GU, 2018), os resíduos agroindustriais (CANTRELL et al, 2012;NANDA et al, 2018;WHITE;CATALLO;LEGENDRE, 2011;WU et al, 2020;YEOH et al, 2018), florestais, industriais (VALDÉS et al, 2020) e domésticos (VAKALIS et al, 2017). Dentre os processos termoquímicos, estão os convencionais (gaseificação, pirólise e combustão) e a liquefação hidrotérmica.…”

Section: De Acordo Comunclassified

Digestão anaeróbia de efluente de liquefação hidrotérmica de borra de café

Dias¹

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This project aimed the structuring of an energy balance of the process that includes the production of bio-oil by hydrothermal liquefaction of the spent coffee grounds and biogas recovery from the study of anaerobic biodegradability of the effluent resulting from this emerging physicochemical process. The system proposed the waste recovery by using it in the biofuels production to meet growing energy demand and dissociate the focus from the use of fossil fuels. The hydrothermal liquefaction process was conducted by means of an association between the high moisture solid fraction, spent coffee grounds, residue of the soluble coffee production process, and water in a 1:20 ratio, at a temperature of 275 °C and time of 10 minutes. After the hydrothermal liquefaction reaction, a characterization stage of the effluent was conducted. After the characterization, anaerobic biodegradability of the effluent and adaptation of anaerobic sludge was carried out. After characterization, the study proceeded to the anaerobic effluent assays. The sludge previously exposed to the effluent was applied in variant initial COD assays aimed at the determination of biogas production, in order to obtain kinetic parameters of the anaerobic digestion of the effluent as substrate. The assays were carried out in 1000 ml flasks operated in batch and subjected to N 2 atmosphere at 37 o C.Calculating the kinetic constants, the intermediate digestion compounds were determined.Once determined the volatile acids, a mathematical modeling was performed according to the Anaerobic Digestion Model No 01 (ADM1). The model proposed by Wu et al. (1988) presented the highest correlation coefficient (R 2 ) when adjusted to experimental data of effluent degradation kinetics. For this adjustment, the n index was 4.61 ± 0.93, which indicates intense inhibition by substrate excess at concentrations above 5304 ± 235 mg L -1 .The modified ADM1 modeling of the data indicated inhibition of hydrogenotrophic and acetoclastic methanogenesis due to the toxicity of the effluent.

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Thermochemical liquefaction of pig manure: Factors influencing on oil

Cited by 32 publications

References 52 publications

Progress in Hydrothermal Liquefaction of Algal Biomass and Hydrothermal Upgrading of the Subsequent Crude Bio-Oil: A Mini Review

Progress in Hydrothermal Liquefaction of Algal Biomass and Hydrothermal Upgrading of the Subsequent Crude Bio-Oil: A Mini Review

Speciation of Main Nutrients (N/P/K) in Hydrochars Produced from the Hydrothermal Carbonization of Swine Manure under Different Reaction Temperatures

Digestão anaeróbia de efluente de liquefação hidrotérmica de borra de café

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