微生物还原法制备脱硫催化剂吸附SO2的研究  

Study on desulfurated catalyst prepared by biological reduction for SO_2 adsorption

作　　者：杨海贤[1,2] 阮亿明[1] 卢建华[1] 宋浩[2] 

机构地区：[1]湄洲湾职业技术学院化学工程系,福建莆田351100 [2]厦门大学化学化工学院,福建厦门361005

出　　处：《齐齐哈尔大学学报（自然科学版）》2015年第6期70-74,共5页Journal of Qiqihar University(Natural Science Edition)

基　　金：福建省教育厅A类科研项目(JA14440);莆田市工业科技类科研项目(2012JG01)资助

摘　　要：在室温条件,采用大肠杆菌(Escherichia coli)与常规浸渍法制备的Cu O/γ-Al2O3相互作用制备了一种络合催化剂,并研究了催化剂在液相中的脱硫和再生性能。研究表明:该络合催化剂在Cu负载量为2%时,对SO2的饱和吸附量可达312.2 mg/g·cat,当SO2浓度为100mg/L,催化剂浓度1g/L时,其脱硫率能达到92.8%;吸附后的催化剂可通过加热再生,4次再生后其脱硫率为80.5%,是一种性能良好的脱硫剂。FTIR和XPS分析表明,在有氧和水条件下,菌粉表面的把Cu2+还原成Cu+,然后Cu+与菌粉中的羧基相互作用形成的络合物是吸附SO2的活性中心。A complex catalyst was prepared by bioreduction method with Escherichia coli at low temperature and its desulfurization ability and regenerative property were studied. Stoichiometric amounts of Cu（NO3）2 aqueous solution was impregnated on γ-Al2O3 for the preparation of CuO/γ-Al2O3. The loading weight of Cu2＋ is 2%. Experiments also showed that the adsorbent had a good capacity of SO2 （312.2 mg/g adsorbent）, and the efficiency of desulfurization can reached 92.8% when concentration of SO2 and adsorbent were 100 mg/L and 1 g/L respectively.There results indicated that it can be easily regenerated and theregenerative adsorbent still has a good SO2 adsorption ability, higher than 80.5% of that in fresh adsorbent after four regenerations. FTIR and XPS analysis showed that biomass can reduce Cu2＋ to Cu＋ by aldose and keep the valence of copper exposed to O2 and H2O atmosphere, then Cu＋ and bacteria powder in the carboxyl group formed by the interaction of the complexes are the active center SO2 adsorption.

关 键 词：大肠杆菌 吸附 脱硫 再生 

分 类 号：X703.1[环境科学与工程—环境工程]