Cu-Ni_(x)-BTC催化剂的C_(3)H_(6)-SCR脱硝特性的实验研究  

Experimental study on C_(3)H_(6)-SCR activity over Cu-Ni_(x)-BTC catalysts

作　　者：张津威 李炬星 宁淑英 张艳梅 苏亚欣[1] ZHANG Jinwei;LI Juxing;NING Shuying;ZHANG Yanmei;SU Yaxin(School of Environment Science and Engineering,Donghua University,Shanghai 201620,China;Shanghai Electric Group Co.,Ltd.,Shanghai 200070,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]上海电气集团股份有限公司,上海200070

出　　处：《燃料化学学报(中英文)》2025年第4期527-537,共11页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(52276103)资助。

摘　　要：本研究通过水热法一步合成Ni掺杂的Cu-Ni_(x)-BTC催化剂,研究其在5%O_(2)条件下C_(3)H_(6)-SCR的脱硝性能。结果表明,引入Ni使Cu-BTC催化活性改善,Cu-Ni_(1/2)-BTC在250-275℃的NO转化率达100%,N_(2)选择性98.3%。此外,利用多种技术方法对催化剂进行表征。结果表明,Ni掺杂到Cu-BTC的骨架结构中,部分在催化剂表面均匀分散。引入Ni后,催化剂的比表面积与孔容减小,孔径增大;与Cu-BTC相比,Cu-Ni_(x)-BTC拥有更多Cu^(+)离子、吸附氧以及Lewis酸和在低温下优异的氧化还原性能,这使其具有更强的催化活性。Nitrogen oxides(NO_(x))emissions resulting from the burning of fossil fuels have detrimental effects on both human health and the environment.Therefore,it is necessary to reduce the release of NO_(x)into the atmosphere.Selective catalytic reduction of NO with C_(3)H_(6)(C_(3)H_(6)-SCR)shows great potential because C_(3)H_(6),as a reducing gas,not only reduces the expenses,but also offers enhanced safety and convenience,as compared to NH_(3).Low-temperature denitrification process is considered to be cost-saving and energy-efficient.Improving the low-temperature denitrification activity of the catalyst is the key point and a hot topic.Cu-BTC catalyst has the advantages of an adjustable metal site,uniform pore structure and high specific surface area and shows excellent low-temperature catalytic activity in SCR of NO using NH_(3)(NH_(3)-SCR),however,it has poor low-temperature activity when applied to C_(3)H_(6)-SCR.To overcome this limitation,in the present study,an additional metal,Ni,was introduced to Cu-BTC to enhance its low-temperature denitrification activity through intermetallic synergies effect.Onestep hydrothermal technique was used to synthesize the Ni-doped Cu-Ni_(x)-BTC catalyst.The basic chemical physical properties of the catalysts were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),N_(2)adsorption-desorption,X-ray photoelectron spectroscopy(XPS),temperature-programmed reduction of hydrogen(H_(2)-TPR)and pyridine adsorption-Fourier transform infrared spectroscopy(Py-FTIR),etc.The C_(3)H_(6)-SCR reactivity was evaluated in a fixed bed reactor with flue gas consisting 0.05%NO,0.1%C_(3)H_(6),5%O2.The results demonstrated that the introduction of Ni improved the catalytic activity of Cu-BTC.The Cu-Ni_(1/2)-BTC catalyst achieved a NO conversion rate of 100%and N_(2)selectivity of 98.3%at 250-275℃,and the C_(3)H_(6)conversion rate of Cu-Ni_(1/2)-BTC is higher at the same temperature,and the C_(3)H_(6)conversion temperature moves to low temperature.The resistance to SO2 of Cu-N

关 键 词：氮氧化物还原 C_(3)H_(6)-SCR 催化剂 Cu-Ni_(x)-BTC 一步水热法 

分 类 号：X511[环境科学与工程—环境工程]