The purposes of acid pretreatment
Webb15 sep. 2024 · Acid pretreatment is the most common method for the separation and purification of clay minerals. Given that hydrochloric acid (HCl) can dissolve chlorite and … Webb19 juni 2015 · The most interesting finding is that severe acid pretreatment significantly decreases the average pore size, i.e. 90% average size decrease could be observed after 60 min dilute acid pretreatment at 160 °C; however, the nano-pore space formed between the coated microfibrils increased after pretreatment, especially with the acid pretreatment, …
The purposes of acid pretreatment
Did you know?
Webb21 dec. 2009 · Abstract and Figures In this study, the dilute maleic acid pretreatment of wheat straw is optimized, using pretreatment time, temperature and maleic acid concentration as design variables. A... Webb31 juli 2024 · Pretreatment with acid such as sulfuric acid (H 2 SO 4) has been commercially used to treat biomass such as switchgrass, corn stover, and spruce …
Webb15 jan. 2024 · In this work, a delignification process, using lime (Ca(OH)2) as an alternative alkali, was evaluated to improve enzymatic saccharification of corn stover cellulose, with the final goal of obtaining second-generation bioethanol. For that, an experimental design was conducted in order to assay the effect of temperature, lime loading, and time on the … WebbThe advantages of acid hydrolysis are that the acid can penetrate lignin without other pretreatments such as enzymatic, bacterial, high pressure, and temperature methods, and the rate of acid hydrolysis is faster than enzyme hydrolysis. However, cellulose also degrades rapidly under acidic conditions (Cheung and Anderson 1996).
Webbble) for quality assurance purposes and/or to provide data for background subtraction calculations. These quality controls are discussed in more detail by Bronk Ramsey et al. (2004a,b), Brock et al. (2007), and Wood et al. (forthcoming). Table 1 Standard 14C pretreatment methods at ORAU. Material Lab code Acid (HCl) Base (NaOH) Acid (HCl ... WebbThe study describes sulfuric acid pretreatment of straw from Secale cereale L. (rye straw) to evaluate the effect of acid concentration and treatment time on the efficiency of biofuel production. The highest ethanol yield occurred after the enzyme treatment at a dose of 15 filter paper unit (FPU) per gram of rye straw (subjected to chemical hydrolysis with 2% …
WebbOrganic acid pretreatments have been gained much interests as one of the high potential methods for promoting enzymatic saccharification of lignocellulosic materials due to their lower hazardous properties and lower production of inhibitory by-products of fermentation than typical chemical pretreatment methods.
WebbAccording to the mathematical models, optimum pretreatment conditions to attain the highest released sugar content for acetic acid was 107.3 °C, 30 min, 8.23 wt%, for citric acid (131.92 °C, 58.92 min, 13.92 wt%) and for oxalic acid (100 °C, 60 min, 15 wt.%) in terms of pretreatment temperature, pretreatment time, and organic acid concentration, … sandwiches emeryvilleWebb8 juli 2024 · to pretreat the lignocellulosic biomass in order to completely or partially remove the components. During the past few years, a large number of chemical pretreatment including lime, acid, steam ... sandwiches encinitasWebbAcid pretreatment CeO 2 Surface acidity Reduction property NH 3-SCR reaction ABSTRACT A series of CeO 2 pretreated with different acids (i.e.,CH 3COOH (HAc), HNO 3, HCl, H 3PO 4, and H 2SO 4) were prepared with the purpose of exploring the influence of acid pretreatment on the physicochemical property and catalytic performance of CeO 2 for … shoring method statementWebb25 okt. 2024 · This study evaluated the effects of 1% (wt/vol) citric and lactic acids pretreatments on the physicochemical and antioxidant properties of germinated adlay. … shoring methods pdfWebb5 dec. 2024 · A number of previous studies determined dilute acid pretreatment conditions that maximize xylose yields from pretreatment or glucose yields from subsequent digestion of the pretreated cellulose, but our emphasis was on identifying conditions to realize the highest yields of both sugars from both stages. sandwiches el cajonWebbHowever, when microbial consortia are used for pretreatment purposes, ... Acid-hydrothermal pretreatment of Chlorella sp. with 5% sulfuric acid at 117 °C for 20 min followed by the addition of 25 Unitg-1 algae of glucoamylase raised the final ethanol yield to 10.58 gL-1 from 5.62 gL-1 without enzymatic actions [126]. shoring methodsWebbFör 1 dag sedan · An alkaline pretreatment of pineapple crowns produced a ferulic acid, which is converted into vanillic acid by Aspergillus niger. For the production of vanilla and other industrials derivates vanillic acid is an important precursor( Tang, Hassan, Md-Jahim, Mustapha, & Maskat, 2014 ). sandwiches everett wa