生物质焦催化裂解萘和苯酚的实验

Catalytic Decomposition of Naphthalene and Phenol over Biomass Char

通过生物质制焦条件(制焦温度、热解速率、原料种类)的改变制备了不同的生物质焦样品,并在热裂解仪——气相色谱/质谱联用装置(Py-GC/MS)上进行生物质焦对焦油模型化合物萘和苯酚的在线催化裂解实验,考察了反应温度、制焦条件、制焦原料对萘和苯酚催化裂解转化率的影响。结果表明,反应温度越高,生物质焦条件下萘和苯酚的在线催化裂解转化率越高;相同反应条件下,制焦温度越高,热解速率越快,生物质焦的比表面积、孔容积越大,催化活性越高。850℃快速热解杉木焦对萘和苯酚的转化率分别为55.6%和76%;生物质焦的扫描电镜观测和金属氧化物含量测定结果表明不同原料制得生物质焦催化活性差异与其表面形貌和金属氧化物含量有关。

Biomass tar catalytic decomposition upon pyrolysis-gas chromatography/mass spectrometry（Py-GC/MS） was studied by taking naphthalene and phenol as model compound.The effect of reaction temperature,charring conditions,such as the pyrolysis temperature,the heating rate and the precursors on model compound conversion was determined.The results showed that tar conversion increased with the increasing reaction temperature;higher charring temperature and higher heating rate could enlarge the surface area and pore volume of biomass chars and also enhance tar conversion.Conversion of naphthalene and phenol were 55.6% and 76% respectively on biomass char prepared at 850℃ with quick heating rate. Scanning electron microscope（SEM） and test results of char mineral oxides contents showed that catalytic activity of biomass chars was related to their surface morphology and the mineral oxides contents.