College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, PR China.
College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, PR China.
Bioresour Technol. 2014 Mar;156:376-9. doi: 10.1016/j.biortech.2014.01.062. Epub 2014 Jan 24.
To improve chemicals selectivity under low temperature, a new method that involves the injection of additives into biomass pyrolysis is introduced. This method allows biomass pyrolysis to achieve high selectivity to chemicals under low temperature (300°C), while nothing was obtained in typical pyrolysis under 300°C. However, by using the new method, the first liquid drop emerged at the interval between 140°C and 240°C. Adding methanol to mushroom scrap pyrolysis obtained high selectivity to acetic acid (98.33%), while adding ethyl acetate gained selectivity to methanol (65.77%) in bagasse pyrolysis and to acetone (72.51%) in corncob pyrolysis. Apart from basic chemicals, one high value-added chemical (2,3-dihydrobenzofuran) was also detected, which obtained the highest selectivity (10.33%) in corncob pyrolysis through the addition of ethyl acetate. Comparison of HZSM-5 and CaCO3 catalysis showed that benzene emerged in the liquid because of the larger degree of cracking and hydrodeoxygenation over HZSM-5.
为了在低温下提高化学品的选择性，引入了一种新方法，即将添加剂注入生物质热解中。该方法允许生物质热解在低温（300°C）下实现高化学品选择性，而在典型的 300°C 下的热解中则没有得到任何产物。然而，通过使用新方法，在 140°C 至 240°C 之间的间隔出现了第一个液滴。在蘑菇废料热解中添加甲醇可获得高选择性的乙酸（98.33%），而在蔗渣热解中添加乙酸乙酯可获得高选择性的甲醇（65.77%）和丙酮（72.51%），在玉米芯热解中添加乙酸乙酯可获得高选择性的 2,3-二氢苯并呋喃（10.33%）。除了基本化学品外，还检测到一种高附加值化学品（2,3-二氢苯并呋喃），通过添加乙酸乙酯，在玉米芯热解中获得了最高的选择性（10.33%）。HZSM-5 和 CaCO3 催化的比较表明，由于 HZSM-5 上更大的裂化和加氢脱氧程度，苯出现在液体中。
