Division of Environmental Engineering Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan.
Bioresour Technol. 2013 Dec;150:181-6. doi: 10.1016/j.biortech.2013.09.083. Epub 2013 Sep 28.
The pyrolysis of pig compost was performed in a two-stage fixed-bed reactor to determine the effects of decomposition temperatures and catalysts (i.e., transition-metal and non-transition-metal catalysts) on carbon and nitrogen conversions. The secondary decomposition was investigated at different temperatures from room temperature up to 750°C. Then the effects of various catalysts were investigated at 650°C. Approximately 60% of the carbon and 80% of the nitrogen in the pig compost were converted into volatiles during pyrolysis. Conversion of carbon and nitrogen species in tar into gas, and the evolution undesirable NH3 and HCN without catalyst increased with increasing decomposition temperature. Transition-metal catalysts showed excellent activity for conversion of condensable volatiles into gas and NH3 and HCN into N2. Although non-transition-metal catalysts had moderate activity for the conversion of volatiles into gas and negligible activity for the conversion of NH3 into N2, dolomite can provide liquid fuel with negligible amount of nitrogen species.
猪粪在两段式固定床反应器中进行热解，以确定分解温度和催化剂（即过渡金属和非过渡金属催化剂）对碳和氮转化的影响。在室温至 750°C 的不同温度下研究了二次分解。然后在 650°C 下研究了各种催化剂的影响。猪粪中约 60%的碳和 80%的氮在热解过程中转化为挥发物。在没有催化剂的情况下，焦油中碳和氮物种向气体的转化，以及不希望的 NH3 和 HCN 的逸出增加，随着分解温度的升高而增加。过渡金属催化剂对可冷凝挥发物转化为气体以及 NH3 和 HCN 转化为 N2 具有优异的活性。尽管非过渡金属催化剂对挥发物转化为气体具有中等活性，对 NH3 转化为 N2 几乎没有活性，但白云石可以提供氮含量可忽略不计的液体燃料。
