微波低温催化热解木屑制取可燃气研究

Production of Combustible Gas by Low-temperature Catalytic Pyrolysis of Sawdust under Microwave Energy

以可燃性气体为目的产物,在450~600℃低温条件下对木屑进行微波催化热解。考察了热解温度、催化剂种类以及催化剂用量对微波热解可燃气产量和热值的影响,并分析热解过程中各气体组分的变化趋势。结果表明：催化剂的加入可有效提高气体产率,不同催化剂对气体产率的影响顺序为：K2CO3〉Na OH〉Na2CO3〉Mg O〉Ca O〉Na H2PO4〉Na2HPO4。在热解温度550℃、K2CO3用量（以木屑质量计）20%的条件下得到高产量的中热值可燃性气体,气体产率为62.65%,低位热值14.05 MJ/m3;且K2CO3作为催化剂时可得到较高的H/C的气体。

The production of combustible gas from sawdust using microwave pyrolysis at a low-temperature of 450-600 ℃ was carried out. Variation of the gases composition was analyzed during the pyrolysis process. The effects of pyrolysis temperature, different kinds of catalysts, and different amounts of K2CO3 on the changes of components in combustible gas were studied. The results showed that under the conditions of pyrolysis temperature 550 ℃ and 20% amounts of K2CO3, the maximum yield of combustible gas was 62.65% with low heating value （LHV） of 14.05 MJ/m3. The combustible gas with high H/C ratio could be obtained under the catalysis of K2CO3.