Simultaneous catalytic hydrolysis of HCN, COS and CS2 over metal-modified microwave coal-based activated carbon
Simultaneous catalytic hydrolysis of HCN, COS and CS2 over metal-modified microwave coal-based activated carbon
复制标题
金属改性微波煤基活性炭同时催化水解HCN、COS和CS2
DOI：
10.1016/j.seppur.2020.118205
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发表时间：
2021-03-15
影响因子：
8.6
通讯作者：
Li, Kai
中科院分区：
文献类型：
--
作者：
Liu, Na;Ning, Ping;Li, Kai
制备了一系列金属氧化物改性的微波煤基活性炭（MCAC）催化剂，用于氰化氢（HCN）、羰基硫（COS）和二硫化碳（CS2）的同时催化水解反应。考察了金属种类、前驱体、金属氧化物用量、煅烧温度等因素对合成的影响。Al2O3与MCAC之间的相互作用改善了Al的分散性，提高了催化剂的脱除效率。Al（2）O（3）为主要活性组分，提供吸附和水解能力。碱性和强氧化中心负责去除HCN，COS和CS2。同时，吸附水有利于催化水解反应的进行。Al（2）O（3）是由铝盐分解生成的。在过高的煅烧温度下，Al（2）O（3）与表面官能团发生反应。Al2（SO4）（3）和Al（NO3）（3）的生成导致催化剂失活。
In this work, a series of metal oxides modified microwave coal-based activated carbon (MCAC) catalysts were prepared for simultaneously catalytic hydrolysis of hydrogen cyanide (HCN), carbonyl sulfide (COS) and carbon disulfide (CS2). The influences of metal species, precursor, metal oxides amount and calcination temperature were investigated. The interaction between Al2O3 and MCAC improved the dispersion of Al and enhanced the removal efficiency of catalyst. Al(2)O(3 )was the main active component and it provided the adsorption and hydrolysis abilities. The alkaline and strong oxidation sites were responsible for removing HCN, COS and CS2. Meanwhile, the adsorbed water was beneficial to the catalytic hydrolysis reactions. Al(2)O(3 )was attributed to the decomposition of aluminum salt. Under excessive high calcination temperature, Al(2)O(3 )reacted with surface functional groups. The formation of Al-2(SO4)(3) and Al(NO3)(3) resulted in the deactivation of catalyst.