原位制备再生型纳米氧化锌高温煤气脱硫剂  

In-situ preparation of regenerable nano-zinc oxide sorbent for hot coal gas desulfurization

作　　者：贾磊[1] 李玉红 张赛赛[1] 武蒙蒙[1] 米杰[1] 

机构地区：[1]太原理工大学煤科学与技术教育部和山西省重点实验室,山西太原030024 [2]山西省能源产品质量监督检验研究院,山西太原030012

出　　处：《天然气化工—C1化学与化工》2017年第4期34-39,共6页Natural Gas Chemical Industry

基　　金：国家自然科学基金(NO.51272170)

摘　　要：为解决高温煤气脱硫剂在使用过程中的粉化问题,设计了一种独特的脱硫剂原位制备方法。首先采用固相法合成纳米硫化锌前驱体,再通过对前驱体进行原位再生从而得到再生型纳米氧化锌脱硫剂。考察了前驱体再生过程中再生温度、氧气体积分数和再生空速对脱硫剂再生性能的影响,并使用XRD、TEM和BET等仪器对前驱体和再生型脱硫剂进行了表征。获得了最佳的前驱体再生条件:再生温度650℃、氧气体积分数6%和再生空速4000h^(-1)。对制备的脱硫剂进行了四次硫化再生循环测试。结果显示,该脱硫剂经过四次硫化再生后仍保持较高的机械强度,维持在140N/cm左右,没有出现粉化和涨裂等问题,且硫化性能在多次硫化后也保持稳定。In order to solve the powdering problem of hot coal gas desulfurizer in its use, a unique desulfurizer preparation method was designed. Firstly, the nano-zinc sulfide precursor was synthesized by solid phase method, then the regenerated nano-zinc oxide desulfurizer was obtained by in-situ regeneration of the precursor. The effects of regeneration temperature, oxygen concentration and MHSV on the regeneration performance of the desulfurizer were investigated. The precursors and regenerative desulfurizers were characterized by XRD, TEM and BET. The optimum regeneration conditions were determined as follows： regeneration temperature of 650℃, oxygen volume fraction of 6% and gas hourly space velocity of 4000h^-1. The prepared desulfurizer was subjected to sulfurizationregeneration cycle test for four times. The results showed that the desulfurizer maintained high mechanical strength （-140N/cm） after four sulfurization-regeneration cycles, and no powdering and cracking phenomena were found. The sulfurization performance remained stable after repeated sulfurization.

关 键 词：纳米氧化锌 原位制备 脱硫剂 机械强度 热煤气 

分 类 号：TQ426[化学工程]