Jeong Sangjae, Lee Taeho, Lim Se Jeong, Park Young-Kwon, Kim Seungdo, Kim Young-Min
Research Center for Climate Change and Energy, Hallym University, Chuncheon, 24252, Republic of Korea.
Korea Environment and Water Works Institute, Seoul, 07201, Republic of Korea.
J Nanosci Nanotechnol. 2021 Jul 1;21(7):3764-3768. doi: 10.1166/jnn.2021.19195.
The demand for alternative energy is increasing rapidly because of global warming and the depletion of fossil fuels. Gasification is a technology that produces gaseous fuels through the incomplete combustion of waste or biomass. The introduction of a catalyst during gasification may increase the production of H₂ and reduce tar formation. In this study, the catalytic gasification of rice hulls was carried out using a fluidized gasifier. To improve the gas yield and reduce tar, municipal solid waste incineration bottom ash (IBA) having nanoporosity was introduced as a substitute for the fluidized bed material. Gasification was carried out at 800 °C, and the flow materials were silica sand, dolomite, and incineration bottom ash. The equivalence ratio, which is the ratio of oxygen supplied to oxygen required for complete combustion, was set to 0.3. The application of alternate fluidized bed materials (dolomite and incineration bottom ash) was effective in improving the hydrogen yield and tar reduction. This was attributed to the high Ca and Mg contents in dolomite and incineration bottom ash. Therefore, it is expected that IBA can be utilized as a catalytic fluidized bed material to replace silica sand.
由于全球变暖和化石燃料的枯竭，对替代能源的需求正在迅速增加。气化是一种通过废物或生物质的不完全燃烧来生产气体燃料的技术。在气化过程中引入催化剂可能会增加氢气的产量并减少焦油的形成。在本研究中，使用流化气化炉对稻壳进行催化气化。为了提高气体产量并减少焦油，引入具有纳米孔隙率的城市固体废物焚烧底灰（IBA）作为流化床材料的替代品。在800℃下进行气化，流动材料为硅砂、白云石和焚烧底灰。当量比，即供应的氧气与完全燃烧所需氧气的比率，设定为0.3。交替使用流化床材料（白云石和焚烧底灰）有效地提高了氢气产量并减少了焦油。这归因于白云石和焚烧底灰中高含量的钙和镁。因此，预计IBA可以用作催化流化床材料来替代硅砂。
