检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]华南理工大学制浆与造纸工程国家重点实验室,广州510640
出 处:《中华纸业》2012年第22期24-28,共5页China Pulp & Paper Industry
摘 要:乙酸法制浆可以分离得到较大含量的半纤维素副产物,且分离方法简单。利用离子色谱分析了玉米秸秆乙酸制浆副产物半纤维素糖溶液中的单糖组成情况,并对其进行水解,分析了水解条件对单糖组成的影响。结果表明:玉米秸秆乙酸制浆副产物半纤维素糖溶液中约有10%左右的单糖;低硫酸浓度(1%)和较长水解时间(2h)时获得的单糖总量最大,能达到38%左右;增加硫酸浓度(大于1%),木糖降低幅度很大;硫酸浓度大于2%时,葡萄糖进一步降解反应也很明显;增加硫酸浓度有利于低聚糖降解得到甘露糖,但阿拉伯糖、半乳糖受硫酸浓度变化的影响很小。Acetosolv pulping can easily fractionate plenty of hemicellulose as by-product. The separated hemicellulose from corn stalk by acetosolv pulping was hydrolyzed by dilute sulfuric acid and monosaccharide components in hemicellulose fractionation and hydrolysis were investigated by ion exchange ch romatog ram. The results show that there is about 10% monosaccharides in hemicellulose fractionation. Low sulfuric acid concentration(1%) and long hydrolysis time(2h) can get maximum amount of monosaccharides, about 38%. Content of xylose and glucose would be substantially cut down when sulfuric acid concentration rises over 1% for xylose and 2% for glucose. Contents of mannose rise as sulfuric acid concentration increases, but contents of arabinose, galactose varies little when sulfuric acid concentration changes.
分 类 号:X793[环境科学与工程—环境工程]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:3.137.161.247