ADVANTAGE OF ACID SULFITE COOKING AS A PROCESS OF MONOSACCHARIDE AND ETHA-NOL PRODUCTION
From the standpoints of biorefinering processes, Japanese larch (Larix leptolepis) wood, acacia (Acacia mearnsii) wood, and bamboo (Phyllostachys pubescens) stem were cooked using the magnesium base/acid sulfite cooking method, and the dissolution behavior of carbohydrate in spent sulfite liquor (SSL) was studied. It was found that glucose dissolves rapidly into SSL immediately after sufficient removal of lignin from the pulp. Cellulose more rapidly dissolved as glucose into SSL at die later stage of cooking than at the initial stage. In addition, it was shown that larch mannan and acacia xylan dissolve as monosaccharides and oligosaccharides during the initial stage of cooking, and that both the hydrolysis of oligosaccharides and the decomposition of monosaccharides in SSL proceeded with increasing cooking time. The amount of enzyme adsorbed to residual lignin in enzyme-treated pulp was measured by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). The enzyme-treated acid sulfite pulp (SP) absorbed cellulase as 30~80 FPU on 1 g of lignin. It has a much lower value than sodaanthraquinone (AQ) pulp enzyme-treated.
glucose ethanol cellulose lignin acid sulfite cooking
Keishi Tanifuji Shiho Takahashi Hiroshi Ohi Keiichi Nakamata
Graduate School of Life and Environmental Sciences,University of Tsukuba Graduate School of Life and Environmental Sciences,University of Tsukuba Current address Department Technical and Development Division, Hokuetsu Kishu Paper Co., Ltd.
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
1055-1060
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）