石脑油固定床催化重整催化剂SR-2000的研发及首次工业应用试验

DEVELOPMENT AND THE FIRST COMMERCIAL APPLICATION TEST OF CATALYST SR-2O0O FOR FIXED-BED NAPHTHA CATALYTIC REFORMING

分别采用醇铝水解法制备的SB、铝酸盐沉淀法制备的ASIA和SRPA3种拟薄水铝石粉体制备氧化铝载体,并采用X射线衍射、扫描电子显微镜和N2附-脱附等方法对其进行表征。结果表明,与采用ASIA粉体制备的SRH载体相比,由SRPA粉体制备的SRR载体的堆密度提高约21%,孔径分布在6~10nm的孔所占比例明显提高,10 nm以上的孔所占比例明显降低。以SRR为载体,开发了新一代石脑油固定床催化重整催化剂SR-2000。采用吡啶吸附红外光谱、CO吸附原位红外光谱和扫描透射电子显微镜等方法对SR-2000进行表征,并与上一代催化剂SR-1000进行对比。结果表明:SR-2000催化剂的中强L酸酸量和弱L酸酸量均高于SR-1000催化剂;SR-2000催化剂除了有少量的Pt原子簇外,还有较多的单或双Pt原子分布。实验室装置评价及首次工业应用试验结果均表明,SR-2000催化剂具有优良的石脑油固定床催化重整反应性能。

The alumina carriers were prepared by SB,ASIA and SRPA powders and characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM)and N2 adsorption-desorption.The results showed that the dense packing density of SRR carrier prepared from SRPA powder was increased by about 21%,the proportion of holes between 6-10 nm in the aperture volume distribution was significantly increased,and the proportion of holes above 10 nm was significantly reduced compared with that of SRH carrier prepared by ASIA powder.A new generation of naphtha reforming catalyst SR-2000 was developed with SRR as carrier.The catalyst SR-2000 was characterized by pyridine adsorption IR,in situ CO-IR and scanning transmission electron microscopy(Cs-STEM).The results displayed that the amount of medium-strong and weak L acid on catalyst SR-2000 was higher than that on catalyst SR-1000,and there were a large number of single or double Pt atoms on catalyst SR-2000 besides a small number of Pt clusters.Both the evaluation of the laboratory equipment and the first commercial application exhibited that catalyst SR-20oo0 had excellent catalytic performance for naphtha reforming in fixed-bed reactor.