石油化工高等学校学报
石油化工高等學校學報
석유화공고등학교학보
JOURNAL OF PETROCHEMICAL UNIVERSITIES
2015年
2期
31-34
,共4页
何依隆%张磊%胡鑫%胡少鐘%王淳青%唐宇%秦玉才%宋丽娟
何依隆%張磊%鬍鑫%鬍少鐘%王淳青%唐宇%秦玉纔%宋麗娟
하의륭%장뢰%호흠%호소종%왕순청%당우%진옥재%송려연
Y分子筛%碱刻蚀%介孔%酸性
Y分子篩%堿刻蝕%介孔%痠性
Y분자사%감각식%개공%산성
Y zeolite%Alkaline solution etching%Mesopore%Acidity
采用碱溶液刻蚀法由工业生产的 NaY 分子筛原粉制备介孔 Y 型分子筛。运用 X 射线衍射(XRD)和骨架红外光谱(FTIR)表征样品的晶体结构,N2吸附等温线和扫描电镜(SEM)表征孔结构和形貌特征,并采用吡啶红外光谱技术(Py-FTIR)表征样品的酸性能。结果表明,NaY 分子筛在适当浓度的碱溶液以及较温和的条件下,处理后可保持分子筛晶体的拓扑结构和基本形貌结构,但在处理过程中晶粒表面或晶粒内可被刻蚀出一定的缺陷介孔结构。另外,碱刻蚀前后对改性后 H 型分子筛中 B 酸中心量的影响不明显,但大大减少了 L 酸中心的数量。
採用堿溶液刻蝕法由工業生產的 NaY 分子篩原粉製備介孔 Y 型分子篩。運用 X 射線衍射(XRD)和骨架紅外光譜(FTIR)錶徵樣品的晶體結構,N2吸附等溫線和掃描電鏡(SEM)錶徵孔結構和形貌特徵,併採用吡啶紅外光譜技術(Py-FTIR)錶徵樣品的痠性能。結果錶明,NaY 分子篩在適噹濃度的堿溶液以及較溫和的條件下,處理後可保持分子篩晶體的拓撲結構和基本形貌結構,但在處理過程中晶粒錶麵或晶粒內可被刻蝕齣一定的缺陷介孔結構。另外,堿刻蝕前後對改性後 H 型分子篩中 B 痠中心量的影響不明顯,但大大減少瞭 L 痠中心的數量。
채용감용액각식법유공업생산적 NaY 분자사원분제비개공 Y 형분자사。운용 X 사선연사(XRD)화골가홍외광보(FTIR)표정양품적정체결구,N2흡부등온선화소묘전경(SEM)표정공결구화형모특정,병채용필정홍외광보기술(Py-FTIR)표정양품적산성능。결과표명,NaY 분자사재괄당농도적감용액이급교온화적조건하,처리후가보지분자사정체적탁복결구화기본형모결구,단재처리과정중정립표면혹정립내가피각식출일정적결함개공결구。령외,감각식전후대개성후 H 형분자사중 B 산중심량적영향불명현,단대대감소료 L 산중심적수량。
Mesoporous Y Zeolites were prepared by alkaline solution etching method using industrial NaY zeolite powders as raw materials.The crystal structure of the samples was characterized using X-ray diffraction (XRD)and skeleton Fourier transform infrared spectroscopy (FTIR).The pore structure and morphology were measured by N2 adsorption isotherms and scanning electron microscopy (SEM).The acid properties were characterized using pyridine-infrared spectroscopy (Py-FTIR) technique.The results show that NaY zeolites can maintain the topology of zeolite crystal and basic morphology structure after treated in a suitable concentration by alkaline solution at mild conditions.A defected mesoporous structure in the zeolite is obtained in the process of alkaline solution etching.In addition,the alkali etching has little effect on the amount of B acid sites of H type zeolites,while,the number of L acid centers greatly reduces in the mesoporous Y Zeolites.