CONCENTRATED ACID CONVERSION OF PINE SOFTWOOD TO SUGARS. PART I: USE OF A TWIN-SCREW REACTOR FOR HYDROLYSIS PRETREATMENT

Autor:	Roger D. Hester, Scott Miller
Rok vydání:	2007
Předmět:	Softwood Materials science Waste management General Chemical Engineering Sulfuric acid General Chemistry Pulp and paper industry chemistry.chemical_compound Hydrolysis Viscosity chemistry Yield (chemistry) visual_art visual_art.visual_art_medium Acid hydrolysis Sawdust Cellulose
Zdroj:	Chemical Engineering Communications. 194:85-102
ISSN:	1563-5201 0098-6445
DOI:	10.1080/00986440600586545
Popis:	The first stage of a two-step concentrated sulfuric acid process that converts softwood sawdust to sugars has been explored. The research focuses on the ability of an in-house custom fabricated corotating twin-screw reactor (TSR) to effectively break down and solubilize crystalline cellulose into low molecular weight carbohydrates. Based on design of experiment (DOE) screening results, a four-level, two-factor experimental model building DOE was undertaken. Solid sawdust conversion to liquid, screw torque, and TSR exit pressure were measured or recorded at each experimental condition to yield percent conversion of solids, processed material viscosity, and material energy requirements. Thereafter, model quadratic equations were fitted to the experimental data and found to be statistically significant. Based on data obtained in the DOE the process was optimized to establish a base case operating condition. The acid-treated product made at base case twin-screw operating conditions showed a 38.2% conversion o...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::656134c3eca7a2f2d9f576f778211508 https://doi.org/10.1080/00986440600586545 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.