Saccharification of cellulose by dry pyrolysis
Saccharification of cellulose by dry pyrolysis
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DOI：
10.1007/s10086-005-0784-x
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发表时间：
2006-03
影响因子：
2.9
通讯作者：
G. Kwon;S. Kuga;K. Hori;M. Yatagai;K. Ando;Nobuaki Hattori
中科院分区：
文献类型：
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作者：
G. Kwon;S. Kuga;K. Hori;M. Yatagai;K. Ando;Nobuaki Hattori
研究了纤维素热裂解制备1，6-脱水-β-D-吡喃葡萄糖苷（左旋葡聚糖，LG）的工艺条件。为了减少左旋葡聚糖的二次降解，研究了两种方法：（1）玻璃瓶传导加热，和（2）CO2激光束从表面辐射加热，在真空和氮气气氛下。在350° ~ 410 ° C的最佳温度范围内，玻璃瓶真空热解的左旋葡聚糖产率为50%~ 55%，其中在加热区附近放置冷阱对提高产率是有效的。相比之下，在氮气下的玻璃瓶热解得到17%-20%的低收率，可能是由于热解产物从热区域的扩散较慢。真空下CO2激光裂解生成气溶胶（白色烟），难以回收，最高收率为5%~ 17%.在这种情况下，氮气流下的处理对气溶胶的回收是有效的，最大产率达到约25%。
Pyrolysis of cellulose was studied for the purpose of practical production of 1,6-anhydro-β-D-glucopyranoside (levoglucosan, LG). To minimize secondary degradation of levoglucosan, two methods were examined: (1) conductive heating by glass bottle, and (2) radiation heating from the surface by CO2laser beam, both under vacuum and in a nitrogen atmosphere. Glass-bottle pyrolysis under vacuum gave levoglucosan yield of 50%–55% in the optimum temperature range of 350°–410°C, where placing the cold trap in the vicinity of heated area was effective in improving the yield. In contrast, glass-bottle pyrolysis under nitrogen gave low yields of 17%–20%, probably due to slower diffusion of pyrolysis product from hot region. The CO2laser pyrolysis under vacuum gave the product as aerosol (white smoke), causing difficulty in recovery of the product, and the maximum yield was 5%–17%. In this case the treatment under nitrogen flow was effective for recovery of aerosol, and the maximum yield reached approximately 25%.