Effect of SC-CO2 pretreatment in increasing rice straw biomass conversion

Gao, Miao; Xu, Feng; Li, Shurong; Ji, Xiaoci; Chen, Sanfeng; Zhang, Dequan

doi:10.1016/j.biosystemseng.2010.05.011

Cited by 112 publications

(57 citation statements)

References 21 publications

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“…The literature reports huge ranges of temperatures and pressures of 100-198°C and 7-300 bar (Gao et al, 2010;Lü et al, 2013;Narayanaswamy et al, 2011;Pasquini et al, 2005a,b). Indeed, in those works the increase of the pressure gave higher delignification yields and an increase in surface area was also observed (Narayanaswamy et al, 2011).…”

Section: Supercritical Pretreatmentmentioning

confidence: 96%

“…It is known the delignification effect produced by this kind of pretreatments in different types of raw materials such as corn stover (Narayanaswamy et al, 2011), switchgrass (Narayanaswamy et al, 2011), rice straw (Gao et al, 2010), sugarcane bagasse (Pasquini et al, 2005a) among others (Pasquini et al, 2005b). The most important parameters taken into account are the moisture, temperature, pressure and pretreatment time.…”

Section: Supercritical Pretreatmentmentioning

confidence: 99%

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Supercritical fluids as a green technology for the pretreatment of lignocellulosic biomass

Daza-Serna

Orrego

Álzate

2016

Bioresource Technology

154

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Section: Supercritical Pretreatmentmentioning

confidence: 96%

Section: Supercritical Pretreatmentmentioning

confidence: 99%

Supercritical fluids as a green technology for the pretreatment of lignocellulosic biomass

Daza-Serna

Orrego

Álzate

2016

Bioresource Technology

154

View full text Add to dashboard Cite

“…It has been reported that SC-CO 2 -pretreated moisture lignocelluloses significantly increase the final yield of reducing sugar in enzymatic hydrolysis. 42,43 However, the similar pretreatment of a Typically, the reactions were conducted at 245°C and 6 MPa H 2 for 2 h. Feedstock (0.5 g), catalyst (0.15 g), and water (50 mL) were put into a 100 mL stainless-steel autoclave. EG, PG, Xy, Man, and Sor represent ethylene glycol, 1,2-propylene glycol, xylitol, mannitol, and sorbitol, respectively.…”

Section: Articlementioning

confidence: 99%

Catalytic Hydrogenation of Corn Stalk to Ethylene Glycol and 1,2-Propylene Glycol

Pang

Zheng

Wang

et al. 2011

Ind. Eng. Chem. Res.

125

156

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The use of whole lignocellulosic biomass as the feedstock for cellulose conversion is of great significance for largescale, low-cost biomass conversion to biofuel and other useful chemicals. We recently achieved the direct conversion of cellulose (pure microcrystalline cellulose) into ethylene glycol at high yields over tungsten carbide catalysts. Here, corn stalk, an agricultural residue available in large quantities, was used as a lignocellulosic feedstock for conversion over nickel-promoted tungsten carbide catalysts under hydrothermal conditions and a hydrogen atmosphere. Nine different pretreatment methods were employed to convert the raw corn stalk to cellulosic feedstock with different chemical components and structures before the catalytic reaction. We found that corn stalks pretreated with 1,4-butanediol, NaOH, H 2 O 2 , and ammonia produced much higher yields of ethylene glycol (EG) and 1,2-propylene glycol (1,2-PG) compared to raw corn stalks, whereas pretreatments with ethanol solution, hot water, hot limewater, and supercritical CO 2 just slightly improved the EG and 1,2-PG yields and corn stalk conversion. The hemicellulose in the corn stalk can be effectively converted to EG and 1,2-PG without hindering the cellulose conversion. In contrast, the lignin was resistant to degradation in the reaction and also inhibited EG and 1,2-PG production. The crystallinity of cellulose did not appear to have notable influence on the EG and 1,2-PG production. In view of the environmental benignity and low cost, pretreatment with ammonia and/or diluted H 2 O 2 solution might be a practical method for corn stalk conversion, after which the derived cellulosic feedstock is readily converted into EG and 1,2-PG at an overall yield of 48% in the reaction.

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“…Methods for raw material pretreatment can be generally categorized into physical [9], chemical (alkali treatment [10] or acid hydrolysis [11,12]), physicochemical, and biological processes [13]. Microwave is an alternative method to conventional heating.…”

mentioning

confidence: 99%

Biogas Production Potential and Kinetics of Microwave and Conventional Thermal Pretreatment of Grass

Kong

Yang

et al. 2011

Appl Biochem Biotechnol

165

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Pretreatment methods play an important role in the improvement of biogas production from the anaerobic digestion of energy grass. In this study, conventional thermal and microwave methods were performed on raw material, namely, Pennisetum hybrid, to analyze the effect of pretreatment on anaerobic digestion by the calculation of performance parameters using Logistic function, modified Gompertz equation, and transference function. Results indicated that thermal pretreatment improved the biogas production of Pennisetum hybrid, whereas microwave method had an adverse effect on the performance. All the models fit the experimental data with R (2) > 0.980, and the Reaction Curve presented the best agreement in the fitting process. Conventional thermal pretreatment showed an increasing effect on maximum production rate and total methane produced, with an improvement of around 7% and 8%, respectively. With regard to microwave pretreatment, maximum production rate and total methane produced decreased by 18% and 12%, respectively.

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Effect of SC-CO2 pretreatment in increasing rice straw biomass conversion

Cited by 112 publications

References 21 publications

Supercritical fluids as a green technology for the pretreatment of lignocellulosic biomass

Supercritical fluids as a green technology for the pretreatment of lignocellulosic biomass

Catalytic Hydrogenation of Corn Stalk to Ethylene Glycol and 1,2-Propylene Glycol

Biogas Production Potential and Kinetics of Microwave and Conventional Thermal Pretreatment of Grass

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