Catalytic upgrading of volatiles from coal pyrolysis over sulfated carbon-based catalysts derived from waste red oil
Catalytic upgrading of volatiles from coal pyrolysis over sulfated carbon-based catalysts derived from waste red oil
复制标题
废红油衍生的硫酸化碳基催化剂对煤热解挥发物的催化升级
DOI：
10.1016/j.fuproc.2019.03.003
复制
发表时间：
2019-06-15
影响因子：
7.5
通讯作者：
Gao, Shiqiu
中科院分区：
文献类型：
--
作者：
Wang, Deliang;Chen, Zhaohui;Gao, Shiqiu
以工业废红油为原料，采用自组装工艺制备了硫化碳基催化剂--红油衍生碳材料。在两段固定床反应器中考察了催化剂对煤热解挥发分改质的性能。与活性碳(AC)或焦炭相比，RDCM在提高轻质焦油(沸点<；360℃)的产率和分数方面表现出更好的性能。RDCM具有较高的比表面积和相对较多的缺陷，有利于重焦油向轻焦油的转化。RDCM中硫的高掺杂量使得二次反应生成气态产物的氧化反应较多。裂解水在硫的官能团上被活化，生成H和OH自由基，能够稳定焦油裂解产生的较大的自由基碎片，形成更多的含氧有机化合物。在500℃下，用RDCMS(10wt%)催化改质后的轻质焦油产率和轻焦油馏分分别为7.9wt%和80.0%，比无催化剂热解提高19.6%和33.3%。
Sulfated carbon-based catalysts, red oil-derived carbon materials (RDCMs), were prepared by the self-assembly process from industrial alkylation process waste red oil. The performance of catalysts on upgrading of coal pyrolysis volatiles was investigated in a two-stage fixed-bed reactor. Compared with activated carbon (AC) or char, RDCMs exhibited better performance in increasing the yield and fraction of light tar (boiling point < 360 degrees C). The higher specific surface areas and relatively more defects for RDCMs promoted the conversion of more heavy tar into light tar. The high-content doped sulfur in RDCMs contributed to more oxidation reaction in the secondary reaction for producing gaseous products. The pyrolysis water could be activated on the sulfur functional group to form H and OH radicals, which were able to stabilize the larger radical fragments from tar cracking to form more oxygenated organic compounds. The yield and fraction of light tar after catalytic upgrading using RDCMs (10 wt% of the tested coal) at 500 degrees C were 7.9 wt% and 80.0%, respectively, which increased by 19.6% and 33.3% in comparison with that from coal pyrolysis without catalyst.