超临界CO2萃取系统分离木片中的水分和提取物
removal of water and extractives from softwood with supercritical carbon dioxide
超临界co2萃取系统分离木片中的水分和提取物
salonika aggarwal, shelly johnson, and marko hakovirta*
department of forest biomaterials, north carolina state university, campus box 8001, raleigh, north carolina 27695, united states
bhima sastri
u.s. department of energy,germantown road, germantown, maryland 20874, united states
sujit banerjee*
school of chemical & biomolecular engineering, georgia tech, atlanta, georgia 30332, united states
abstract:
supercritical co2 (sco2) removes both water and extractives from wood chips and flakes at 60 °c. the water appears to be mostly displaced by sco2 because its nominal concentration in sco2 exceeds its solubility limit. sem imaging and contact angle measurements show no major differences in surface properties between sco2-treated and thermally dried flakes, which suggests that their interaction with resin should be similar. an economic analysis for the removal of water and extractives from pine flakes for the manufacture of oriented strand board shows that sco2 treatment is potentially much more cost-effective than thermal drying from both capital and operational perspectives. the main reasons are that the water is removed by displacement rather than through evaporation, environmental control costs are drastically reduced, and the extractives removed represent a value stream instead of pollutants whose emissions need to be controlled. because the sco2 is largely recirculated, the process is greener than conventional direct dryers that generate co2 from the combustion of wood fines used as a fuel.
超临界co2(sco2)在60°c时能去除木屑和木片中的水分和抽出物。由于sco2中的名义浓度超过其溶解度极限，水似乎大部分被sco2置换。扫描电镜(sem)成像和接触角测量表明，经sco2处理的鳞片和经热干燥的鳞片在表面性质上没有显著差异，这表明它们与树脂的相互作用应该是相似的。从生产定向刨花板的松片中除去水和抽出物的经济分析表明，从资本和操作角度来看，sco2处理可能比热干燥更具成本效益。其主要原因是水是通过置换而不是蒸发去除的，环境控制成本大幅度降低，去除的提取物是一种价值流，而不是需要控制排放的污染物。由于sco2大部分是再循环的，这一过程比传统的直接烘干机更环保，后者通过燃烧用作燃料的木屑产生二氧化碳。
优化处理大面积有机/无机混合防反射薄膜，提高钙钛矿太阳能电池效率
32盘热风旋转烤炉
阿斯卡ASCO防爆电磁阀EF8340G001的选型依据
麦克应用系列之粒度粒形—颗粒分析的准确度对生产过程和终产品的影响
数字万用表的具体功能介绍
超临界CO2萃取系统分离木片中的水分和提取物
养殖电动撒料车是养殖户们的好帮手
青岛路博红外测油仪
深圳平安金融中心五大亮点 指静脉识别助力安全管理
宝德burkert隔膜阀清洗阀门内容简述
如何维护步入式高低温试验箱以及各种试验箱
河南日处理980吨炭素回转窑合理利用热能降耗
油气田提锂技术—气田水提锂
美国MAC电磁阀的几大特性
户外高压真空断路器中的‘看门狗’指的是什么？
GRAS发布了一系列用于汽车NVH测试的新型声学传感器
【行业观察】 燃气轮机
柴油螺杆压缩机的特点及优点介绍
便携布氏硬度计的优点
您知道影响食品膨化机膨效果的因素？
超临界co2萃取系统分离木片中的水分和提取物
salonika aggarwal, shelly johnson, and marko hakovirta*
department of forest biomaterials, north carolina state university, campus box 8001, raleigh, north carolina 27695, united states
bhima sastri
u.s. department of energy,germantown road, germantown, maryland 20874, united states
sujit banerjee*
school of chemical & biomolecular engineering, georgia tech, atlanta, georgia 30332, united states
abstract:
supercritical co2 (sco2) removes both water and extractives from wood chips and flakes at 60 °c. the water appears to be mostly displaced by sco2 because its nominal concentration in sco2 exceeds its solubility limit. sem imaging and contact angle measurements show no major differences in surface properties between sco2-treated and thermally dried flakes, which suggests that their interaction with resin should be similar. an economic analysis for the removal of water and extractives from pine flakes for the manufacture of oriented strand board shows that sco2 treatment is potentially much more cost-effective than thermal drying from both capital and operational perspectives. the main reasons are that the water is removed by displacement rather than through evaporation, environmental control costs are drastically reduced, and the extractives removed represent a value stream instead of pollutants whose emissions need to be controlled. because the sco2 is largely recirculated, the process is greener than conventional direct dryers that generate co2 from the combustion of wood fines used as a fuel.
超临界co2(sco2)在60°c时能去除木屑和木片中的水分和抽出物。由于sco2中的名义浓度超过其溶解度极限，水似乎大部分被sco2置换。扫描电镜(sem)成像和接触角测量表明，经sco2处理的鳞片和经热干燥的鳞片在表面性质上没有显著差异，这表明它们与树脂的相互作用应该是相似的。从生产定向刨花板的松片中除去水和抽出物的经济分析表明，从资本和操作角度来看，sco2处理可能比热干燥更具成本效益。其主要原因是水是通过置换而不是蒸发去除的，环境控制成本大幅度降低，去除的提取物是一种价值流，而不是需要控制排放的污染物。由于sco2大部分是再循环的，这一过程比传统的直接烘干机更环保，后者通过燃烧用作燃料的木屑产生二氧化碳。
优化处理大面积有机/无机混合防反射薄膜，提高钙钛矿太阳能电池效率
32盘热风旋转烤炉
阿斯卡ASCO防爆电磁阀EF8340G001的选型依据
麦克应用系列之粒度粒形—颗粒分析的准确度对生产过程和终产品的影响
数字万用表的具体功能介绍
超临界CO2萃取系统分离木片中的水分和提取物
养殖电动撒料车是养殖户们的好帮手
青岛路博红外测油仪
深圳平安金融中心五大亮点 指静脉识别助力安全管理
宝德burkert隔膜阀清洗阀门内容简述
如何维护步入式高低温试验箱以及各种试验箱
河南日处理980吨炭素回转窑合理利用热能降耗
油气田提锂技术—气田水提锂
美国MAC电磁阀的几大特性
户外高压真空断路器中的‘看门狗’指的是什么？
GRAS发布了一系列用于汽车NVH测试的新型声学传感器
【行业观察】 燃气轮机
柴油螺杆压缩机的特点及优点介绍
便携布氏硬度计的优点
您知道影响食品膨化机膨效果的因素？