化工学报2019，Vol.70Issue(8)：3104-3112,9.DOI:10.11949/0438-1157.20190325
垃圾热解-挥发分重整过程中基于产物导向的催化剂选择
Product oriented catalyst choice during MSW pyrolysis and volatile reforming process
摘要
Abstract
To further improve the quality of the waste pyrolysis products and increase the yield of the target product, a reactor from the source semi-coke reforming volatiles is disposed downstream of the waste pyrolysis reactor, and dolomite (D) and activity are mixed in the self-source semi-coke. Dolomite (D) and activated sewage sludge char (ASSC) were added into the char to improve the catalytic effect and to obtain higher gas yield and oil of better quality. The research results showed that, when the volatiles generated from MSW pyrolysis (550℃) were isothermally reformed by the MSW char from the same pyrolysis process the gas yield increased by 44.29% and the pyrolytic liquid yield decreased by 41.33%. In this process the aliphatics in pyrolytic liquid decreased, while monoaromatics increased. As dolomite was added as a catalyst modifier, the pyrolytic oil and its oxygenates??content were further reduced. When ASSC was used as catalyst modifier, it enhanced the conversion of the pyrolytic liquid into gas. Especially for the scenario of Char∶ASSC=1∶1 by mass ratio, the pyrolytic liquid yield decreased from 30.44% to 11.25%, and its moisture content was reduced to 35.64% from 57.23%. In general, the char from MSW pyrolysis had the effect of promoting the formation of monoaromatics and decomposition of aliphatics in liquid products, while both dolomites and ASSC, especially the later, increased the aliphatics?? concentration in the pyrolytic liquid. The addition of dolomite promoted the yields of CH4, H2 and CO in the gas product, while the addition of ASSC greatly facilitated the production of H2 and CO based on the higher level consumption of H2O vapor in the volatiles, but inhibited the production of CH4. When syngas is the target product, char and ASSC mixture can be recommended with the blending ratio of char∶ASSC=1∶1, for which the gas yield reaches 45.5% or 0.50 m3/(kg MSW), and the volume percentage of the syngas (H2+CO) achieves 53.87%.关键词
垃圾热解/半焦/挥发分重整/催化剂/合成气/热解油Key words
MSW pyrolysis/ char/ volatile reforming/ catalyst/ syngas/ pyrolytic oil分类
资源环境引用本文复制引用
梅振飞,陈明,陈德珍,洪鎏,胡雨燕..垃圾热解-挥发分重整过程中基于产物导向的催化剂选择[J].化工学报,2019,70(8):3104-3112,9.基金项目
国家自然科学基金面上项目(51776141) （51776141）
