燃料化学学报Issue(8)：932-939,8.
含尘焦油在改性白云石催化剂上的裂解特性
Cracking characteristics of dust-containing tar over modified dolomite catalyst
摘要
Abstract
A Ni-dolomite catalyst with promoter Lanthanum was prepared by kneading method. The catalyst was used for the cracking reaction of tar model compound containing N-dodecane, cyclohexane, toluene and methylnaphthalene in an atmospheric fixed reactor. The effects of temperature, space velocity and the ratio of water and ingredient on the yield of gas products were examined. The stability test and reaction-regeneration experiments were conducted. Moreover, cracking characteristics of dust-containing tar over the catalyst and dust deposition mechanism were investigated. The results show that the optimum operating condition for the catalyst is reaction temperature 800 ℃, space velocity 300 h-1 , the ratio of water to ingredient 5 :1 . The optimum regeneration condition is 700 ℃ and 1 h. XRD results show that MgO-NiO solid solution and La ( NiO3 ) crystalline phase are converted in the modified dolomite catalyst. Different dust species depositing on the catalyst surface have different influences on the catalytic activity. CaO can improve the catalytic activity. The deposition of Fe2 O3 can convert into a new crystalline phase NiFe2 O4 . SiO2 plays a promoting role in carbon deposition, which can significantly inhibit the catalytic activity.关键词
含尘焦油/白云石催化剂/裂解/再生/粉尘Key words
dust-containing tar/dolomite catalyst/cracking/regeneration/dust分类
化学化工引用本文复制引用
..含尘焦油在改性白云石催化剂上的裂解特性[J].燃料化学学报,2015,(8):932-939,8.基金项目
国家自然科学基金(21006059,21376142) （21006059,21376142）
煤转化国家重点实验室开放基金(J12-13-202)。 （J12-13-202）
