凹凸棒石镍基催化剂对污泥气化焦油催化裂解的特性分析  

Analysis of catalytic cracking of sludge gasification tar over palygorskite nickel-based catalyst

作　　者：王延涛 梁财[1] 周群 杨叙军 宋联 朱葛 陈晓平[1] 赵长遂[1] WANG Yantao;LIANG Cai;ZHOU Qun;YANG Xujun;SONG Lian;ZHU Ge;CHEN Xiaoping;ZHAO Changsui(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing 210096,Jiangsu,China;Wuxi Guolian Environmental Science&Technology Co.,Ltd.,Wuxi 214000,Jiangsu,China)

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,江苏南京210096 [2]无锡国联环保科技股份有限公司,江苏无锡214000

出　　处：《化工进展》2018年第10期3895-3902,共8页Chemical Industry and Engineering Progress

摘　　要：以凹凸棒石为催化剂载体,采用等体积浸渍法制备了多种镍基催化剂,并对催化剂进行了XRD、SEM、BET、EDS等特性分析。在固定床反应器中对催化剂催化裂解污泥气化焦油模型化合物的特性进行了实验研究。考察了反应温度、水碳比(S/C)、气相停留时间、助剂等因素对模型化合物催化裂解特性的影响。结果表明,提高反应温度、增加S/C、延长停留时间、添加助剂均能提高催化剂的催化活性,模型化合物转化率明显增加。但是助剂含量过高反而导致催化剂催化裂解的能力减弱,模型化合物转化率下降。对比Fe、Ce、Cu、Ca 4种助剂发现,在实验范围内,增加Fe的含量,模型化合物转化率上升。当Ce、Cu、Ca助剂质量分数达到3%及以上时,转化率下降明显,甚至低于未添加助剂时的转化率。Various nickel-based catalysts were prepared by equal volume impregnation method with palygorskite as the carrier.The catalytic performance of the nickel-based catalysts to crack the sludge gasification tar model compound toluene was analyzed in a fixed-bed reactor.The effects of reaction temperature,steam/carbon molar ratio(S/C),residence time,additives and Ni content on the toluene conversion were investigated.The experimental results showed that with the increase of reaction temperature,steam/carbon molar ratio(S/C),residence time and adding additives,the toluene conversion clearly increased.However,the catalytic reactivity of catalysts and toluene conversion decreased when excess of additives were added.Among the four additives of Fe,Ce,Cu and Ca,the increase of Fe content led to an improvement of toluene conversion.When the amounts of Ce,Cu and Ca were over 3%,the conversion of toluene decreased obviously,even lower than that without additives.

关 键 词：催化剂载体 固定床 助剂 催化 污泥气化 

分 类 号：O643[理学—物理化学] TK09[理学—化学]