William C. Bowen, Josiah Bartlett, Francis Moore, James Thacher, Dr. John Stockbridge, Dr. Caleb Miller, John Winslow, A. Brooke Faulkland, A. Colles, Messrs. Le Gallois, M. Le Gallois, Baron Larrey,
... Reptiles and Rabid Animals Denominated Algalia, Yerba Del Sapo, or Contra Culebra [Communicated for the New-England ...
1814 - Gale Group | NCCO-STM 1of2
Quanhua Wang, Weijiong Dai, Yi Dai, Meng Pan, Yanchao Liu, Lichen Zhang, Jiajun Zheng, Xuguang Liu, Ruifeng Li, Luoning Ma, Hu Wang, Yuhao Zong,
It is well known that low-silica SAPO-34, with an extra porosity (meso- and/or macropores) system, affords excellent catalytic performance in the methanol-to-olefins (MTO) reaction, while the direct synthesis of low-silica SAPO-34 with a hierarchical structure is difficult to ... content in a gel precursor. Herein, low-silica SAPO-34 nanocrystals were successfully fabricated for the first ... manner. In which, low-silica, ultrasmall nanosquare-shaped SAPO-34 crystals with the same growth orientation along ...
Tópico(s): Metal-Organic Frameworks: Synthesis and Applications
2024 - American Chemical Society | ACS Applied Materials & Interfaces
D. D. Bartholomew, Prof. S. Lilienthal, Prof. H. Senator, E. A. Lodge, Louise Clark-Pyrnelle, Mary Rose Banks, Henry N. Guernsey, Henry Hyde Salter, Morris Longstreth, William Allingham, W. P. Armstrong, Graily Hewitt, Clifford Mitchell, Henry Thomas, J. K. Baudy,
... in Nervous Diseases, Etc., On Therapeutical Use of Sapo Viridis, Convallarine (Lancet), Alcohol as a Therapeutic Agent. ...
1882 - Gale Group | NCCO-STM 1of2
Xiaojun Dai, Yan Cheng, Tingting Liu, Lingjuan Mao, Qiang Wei, Yasong Zhou,
... few reports on the construction of flower-like SAPO-11 molecular sieve. In this work, we successfully synthesized b-axis oriented flower-like SAPO-11 molecular sieve with multi-layered structure in ... time. The morphology and b-axis thickness of SAPO-11 flakes were controlled and the tailored synthesis of b-axis oriented flower-like SAPO-11 with multi-layered structure was realized by ... was prepared by using the synthesized flower-like SAPO-11 as support. Through a series of characterization techniques, the effects of morphological changes of SAPO-11 molecular sieve on the textural properties, acidity, ...
Tópico(s): Catalysis and Hydrodesulfurization Studies
2023 - Elsevier BV | Chemical Engineering Journal
Lucien Howe, Thomas Lothrup, Luther Holden, E. P. Fowler, Dr. Fred. Heman Hubbard, T. Milner Fothergill, Dr. Edward T. Bruen, E. F. Smith, John Marshal, A. D. Rockwell,
... Senses, Vaccination a Relic of Barbarism, Inunction of Sapo Viridis in Scrofula, Selections Vaginal Chancres, Hypertrophy and ...
1882 - Gale Group | NCCO-STM 1of2
Xiaojun Dai, Yan Cheng, Tingting Liu, Lingjuan Mao, Qiang Wei, Yasong Zhou,
The tailored synthesis of plate-like SAPO-11 molecular sieve was achieved by introducing seed-surfactant directing agent into the synthesis system for the first time. The effects of morphological change of SAPO-11 molecular sieve on the physicochemical properties of SAPO-11 and the active phase properties of the ... catalytic performance of NiWS supported catalysts based on SAPO-11 molecular sieve with different morphologies. The plate-like SAPO-11 possessed better textural properties and acidity than ...
Tópico(s): Metal-Organic Frameworks: Synthesis and Applications
2023 - Elsevier BV | Chemical Engineering Journal
Ruizhi Chu, Bangming Yang, Yang Zhou, Jiaxin Wu, Pengcheng Li, Mingzhi Dai, Xianliang Meng, Xiao Li, Weisong Li, Guoguang Wu, Chenxiao Wang,
3 Brief informative subheadings: SAPO-34 film thickness, Coke deposition analysis, Rich hierarchical pores. Composite zeolite film had a shorter lifetime due to the easy deactivation of SAPO-34. We explored the effect of SAPO-34 film thickness on anti-coking performance of composite zeolite film. Three SAPO-34/ZSM-5/quartz films with different SAPO-34 film thicknesses were prepared for MTA reaction. ... comparatively analyzed. The results showed the change in SAPO-34 film thickness could affect the reactivity. The ...
Tópico(s): Catalytic Processes in Materials Science
2023 - Elsevier BV | Journal of the Taiwan Institute of Chemical Engineers
Xiao-Xiao Wang, Shilong Guo, Ziyan Niu,
In the present work, a ZSM-5 (core)/SAPO-11 (shell) composite was prepared by the hydrothermal ... characterization techniques. The catalytic performance of ZSM-5/SAPO-11 for the methylation of naphthalene with methanol ... prepared through the blending of ZSM-5 and SAPO-11. The experimental results showed ZSM-5/SAPO-11 has been prepared with good crystallization, and ... ZSM-5 phase as the core and the SAPO-11 phase as the shell. The pore size of ZSM-5/SAPO-11 was between that of ZSM-5 and SAPO-11, and it had fewer acid sites than ...
Tópico(s): Mesoporous Materials and Catalysis
2023 - Royal Society of Chemistry | RSC Advances
Xiaojun Dai, Yan Cheng, Tingting Liu, Qiang Wei, Yasong Zhou,
In this work, we successfully synthesized high performance SAPO-11 molecular sieve via the novel supergravity-cyclone ... shear-cyclone operation on the physicochemical properties of SAPO-11 molecular sieve were investigated. The supergravity-cyclone treatment improved the textural properties and acidity of SAPO-11 molecular sieve. The effects of support properties ... hydroisomerization of n-hexadecane were further investigated. NiW/SAPO-11-B showed more active phase with hydroisomerization ... doubled yield of i-hexadecane compared with conventional SAPO-11-based catalyst. The process and mechanism of ...
Tópico(s): Catalysis and Oxidation Reactions
2023 - Elsevier BV | Chemical Engineering Journal
Qiong Wu, Jiamin Yuan, Chunmu Guo, Zhenni Liu, Xiujie Li, Zhiqiang Liu, Wei Wang, Wei Wu,
In this work, SAPO-11, SAPO-31 and SAPO-41 with one-dimensional channels are synthesized hydrothermally by employing a di-n-butylamine (DBA) template, industrial silicon and aluminum sources, and the corresponding Pd/SAPOs bifunctional catalysts are prepared by loading 0.5 ... and 2-methylpentadecane in the micropores of different SAPOs is determined by molecular dynamics (MD) simulation, which ... 2-methylpentadecane based on MD simulation of three SAPOs decrease as SAPO-31 > SAPO-41 > SAPO-11, which is consistent ...
Tópico(s): Catalytic Processes in Materials Science
2023 - Elsevier BV | Fuel Processing Technology
Fnu Gorky, Apolo Nambo, Moisés A. Carreón, Maria L. Carreon,
... the catalytic activity of microporous Silico Alumino Phosphate (SAPOs) crystals for the assisted plasma synthesis of ammonia. SAPOs can aid as effective catalysts for the synthesis ... crystallographic limiting pore apertures of 3.4 Å (SAPO-56), 3.8 Å (SAPO-34) and 3.9 Å (SAPO-11). We describe a fundamental insight on the ... size on ammonia synthesis rate for the different SAPOs. The resultant SAPO-11 displayed ammonia synthesis rates as high as ... approximately 1.5 times better compared to other SAPOs. The results indicate that ammonia synthesis is promoted ...
Tópico(s): Catalytic Processes in Materials Science
2023 - Springer Science+Business Media | Plasma Chemistry and Plasma Processing
Xiaojun Dai, Yan Cheng, Qiang Wei, Si Meng, Yasong Zhou,
... crystallization method to synthesize small-crystal and hierarchical SAPO-11 molecular sieve, and prepared the corresponding NiWS ... physicochemical properties of the small-crystal and hierarchical SAPO-11 molecular sieve and the NiWS supported catalyst ... It was found that the crystal size of SAPO-11-S was reduced to 21.8 nm ... particle size was reduced to 70–140 nm. SAPO-11-S was superior to SAPO-11-C in pore properties and acidity. The ... number of medium-strong B acid sites in SAPO-11-S was investigated by 29Si MAS NMR ...
Tópico(s): Catalytic Processes in Materials Science
2022 - Elsevier BV | Fuel
Jing He, Di Mao, Jiakai Hou, Chengming Zhong, Chengyang Yin, Zhen Zhao, Ralph T. Yang,
Cu-SAPO-34 shows high catalytic performance in ammonia selective catalytic reduction (NH3-SCR) of nitrogen oxides (NOx). Complex ... and environmental pollution limited the development of Cu-SAPO-34. Therefore, a new method for preparing Cu-SAPO-34 catalysts is proposed. A series of novel Cu-SAPO-34 catalysts have been synthesized by one-pot ... Cu species and tetraethylenepentamine (TEPA). The novel Cu-SAPO-34 catalysts with different Cu content were prepared ... there are Cu2+ species in the novel Cu-SAPO-34 catalysts and its proportion were analyzed. The ...
Tópico(s): Catalysis and Oxidation Reactions
2022 - Elsevier BV | Fuel
Yan Li, Hongwei Chen, Chaoran Wang, Yu Ye, Libo Li, Xiaowei Song, Jihong Yu,
Small-pore silicoaluminophosphate (SAPO) zeolites with 8-ring pore windows and appropriate acidities/polarities, for example, SAPO-34 (CHA) and SAPO-56 (AFX), have proven to be potential adsorbing materials for selective adsorption of CO2. However, SAPO-35 zeolites (LEV framework topology) synthesized using conventional ... by using N-methylpiperidine (NMP) as a template, SAPO-35 zeolites with various Si contents were synthesized under hydrothermal conditions, which allowed SAPO-35 zeolites with modulated acidities and polarities. The ...
Tópico(s): Carbon Dioxide Capture Technologies
2022 - Royal Society of Chemistry | Chemical Science
Rohit Prajapati, Divya Jadav, Madhu Pandey, Keisuke Nishimura, Satoshi Inagaki, Yoshihiro Kubota, Rajib Bandyopadhyay, Mahuya Bandyopadhyay,
Abstract Silicoaluminophosphates SAPO‐34 (CHA topology) and SAPO‐5 (AFI topology) molecular sieves are selectively prepared by hydrothermal method using templates tetraethylammonium hydroxide and triethylamine, respectively and suitably modified. Hierarchical SAPO‐34 & SAPO‐5 catalysts were post‐synthetically prepared by facile ... investigate structural changes of the molecular sieves. Hierarchical SAPO‐34 & SAPO‐5 were used for the ring opening reaction ... alcohols, and catalytic activity of the acid‐treated SAPO‐34 & SAPO‐5 was compared with that of ...
Tópico(s): Chemical Synthesis and Characterization
2022 - Wiley | European Journal of Inorganic Chemistry
Xiaojun Dai, Yan Cheng, Si Meng, Qiang Wei, Dongdong Chen, Wenbin Huang, Yasong Zhou,
A series of SAPO-11 molecular sieves were synthesized in the concentrated gel system by reducing the water content in the synthesis system. With SAPO-11 molecular sieves as supports, NiW-supported catalysts were prepared for the hydroisomerization of n-hexadecane. SAPO-11 molecular sieves and catalysts were characterized by ... synthesis system could increase the mesoporous volume of SAPO-11 molecular sieve and improve the acidity of SAPO-11. For the corresponding catalysts, using SAPO-11 synthesized in concentrated gel system as the ...
Tópico(s): Metal-Organic Frameworks: Synthesis and Applications
2022 - Elsevier BV | Fuel
Xiaojun Dai, Yan Cheng, Qiang Wei, Si Meng, Pengfei Zhang, Yasong Zhou,
The nano-sized small-crystal and hierarchical SAPO-11 molecular sieves were successfully synthesized with l-Lysine as the crystal growth inhibitor, and their particle size reached 80 nm at the ... size was 22.1 nm. With the synthesized SAPO-11 molecular sieve as support, the corresponding NiW ... hexadecane. The properties of small-crystal and hierarchical SAPO-11 molecular sieve and catalyst were analyzed by ... the formation mechanism of small-crystal and hierarchical SAPO-11 molecular sieve was proposed. The results showed ...
Tópico(s): Mesoporous Materials and Catalysis
2022 - Elsevier BV | Microporous and Mesoporous Materials
Huimin Wang, Hao Li, Lianyun Gao, Xiaoyan Tian, Jiming Hao, Ping Ning, Jianjun Chen, Qiulin Zhang,
... isolated Cu2+ species and zeolite framework of Cu/SAPO-34 had been systematically investigated for NH3-SCR. ... boost catalytic performance and hydrothermal stability of Cu/SAPO-34. The T90 of fresh and aged Cu/Pr(1)-SAPO-34 with low loading of Pr were obviously lower than that of fresh Cu/SAPO-34, while the maximum NOx conversion of aged Cu/SAPO-34 was only 52.6% at 450 °C. Characteristic results disclosed that Cu/Pr(1)-SAPO-34 retained the large surface area, relatively ordered ... Cu2+-2Z, 6MR) of fresh Cu/Pr(1)-SAPO-34. However, more unstable Cu2+ ions in the ...
Tópico(s): Zeolite Catalysis and Synthesis
2022 - Elsevier BV | Fuel
Xiaojun Dai, Yan Cheng, Si Meng, Qiang Wei, Yasong Zhou,
... modification method were used to synthesize Ni-modified SAPO-11 molecular sieves. With the Ni-modified SAPO-11 samples as support, the corresponding NiWS-supported ... were prepared. The effects of Ni-modification on SAPO-11 characteristics and the active phase were studied. The structure, morphology, and acidity of SAPO-11, as well as the interaction between active ... modification method deleted a portion of Al from SAPO-11 molecular sieves while simultaneously integrating Ni into the skeletal structure of the surface layer of SAPO-11 molecular sieves, considerably enhancing the acidity of ...
Tópico(s): Zeolite Catalysis and Synthesis
2022 - Frontiers Media | Frontiers in Chemistry
Yue Ma, Yang Gao, Xiaodong Wu, Baofang Jin, Rui Ran, Zhichun Si, Duan Weng,
... the low-temperature (<100 °C) hydrothermal stability of SAPO-34 and Cu-SAPO-34 were investigated. NH3 temperature-programmed desorption (NH3- ... the adsorption states of NH3 and H2O in SAPO-34, and the destruction of the SAPO-34 framework was revealed by direct and cross- ... MAS NMR. Gaseous NH3 coadsorbed with H2O inside SAPO-34 micropores and induced the hydrolysis of framework ... to deactivation in low-temperature SCR of Cu-SAPO-34. Strongly adsorbed NH4+ via 200 °C preadsorption protected the framework integrity of SAPO-34 and the SCR activity of Cu-SAPO- ...
Tópico(s): Catalytic Processes in Materials Science
2022 - American Chemical Society | ACS Applied Materials & Interfaces
Shoute Zhang, Shujun Ming, Lei Guo, Ce Bian, Ying Meng, Qian Liu, Yahao Dong, Jiajun Bi, Dan Li, Qin Wu, Kaiwei Qin, Zhen Chen, Lei Pang, Weiquan Cai, Tao Li,
Cu-based SAPO-18, SAPO-18/34 intergrowth and SAPO-34 zeolites were applied for the selective catalytic reduction of NOx by ammonia (NH3-SCR) catalysts. Comprehensive characterization results revealed that the SAPO-18/34 with higher amount and strength of ... the fact that intergrowth crystal structure of Cu-SAPO-18/34 exhibited higher fresh NH3-SCR activity, ... and better SO2-resistance ability than that Cu-SAPO-18 and Cu-SAPO-34. In situ DRIFTS results provided the formation ... reaction mechanisms were both involved in Cu-based SAPO-18 and SAPO-18/34 intergrowth zeolites, but ...
Tópico(s): Zeolite Catalysis and Synthesis
2021 - Elsevier BV | Journal of Hazardous Materials
Jiahao Chen, Bin Wang, Kai Yuan, Yutang Kang, Shasha Feng, Feng Han, Hongmiao Wu, Rongfei Zhou, Zhaoxiang Zhong, Yiqun Fan, Weihong Xing,
• One-pot hydrothermal synthesis of high-performance Cu-SAPO-34(D)/SiC catalytic membrane. • The SiO 2 ... source to participate in the growth of Cu-SAPO-34. • Enhanced binding strength and chemical resistance were both achieved for Cu-SAPO-34(D)/SiC catalytic membrane. The SiC catalytic ... application of SiC catalytic membranes. Here, the Cu-SAPO-34(D)/SiC catalytic membranes were directly prepared ... source to participate in the growth of Cu-SAPO-34 zeolites. Excellent binding strength and chemical resistance ... SiC catalytic membranes. As a comparison, a Cu-SAPO-34(I)/SiC catalytic membrane was fabricated via ...
Tópico(s): Gas Sensing Nanomaterials and Sensors
2021 - Elsevier BV | Chemical Engineering Journal
Golnaz Navidi, Maryam Allahvirdinesbat, Seyed Mohammad Mousavi Al-Molki, Soodabeh Davaran, Parvaneh Nakhostin Panahi, Marziyeh Aghazadeh, Abolfazl Akbarzadeh, Aziz Eftekhari, Kazem D. Safa,
... report the fabrication of scaffolds containing chitosan, Ca-SAPO-34 monometallic and/or Fe-Ca-SAPO-34 bimetallic nanoparticles by freeze-drying technique. The ... BET, SEM, and EDS methods. The effects of SAPO-34 and nanoparticles were investigated by changes on ... Cell viability, cell adhesion and cytotoxicity of Ca-SAPO-34/CS and Fe-Ca-SAPO-34 scaffolds were investigated by MTT assay and ... toxicity on scaffolds. Cell tests demonstrated that Ca-SAPO-34/CS scaffold clearly displayed a positive effect ... proliferation. Moreover, the incorporation of Fe2O3 to Ca-SAPO-34/CS scaffold promoted the proliferation of hDPSCs ...
Tópico(s): Electrospun Nanofibers in Biomedical Applications
2021 - Elsevier BV | International Journal of Biological Macromolecules
Boyuan Shen, Xiao Chen, Xiaoyu Fan, Hao Xiong, Huiqiu Wang, Weizhong Qian, Yao Wang, Fei Wei,
... real-space imaging of the atomic lattices in SAPO-34 and SAPO-18 zeolites, including the Al–O–P atoms ... electron microscopy (iDPC-STEM). The spatial distribution of SAPO-34 and SAPO-18 domains in SAPO-34/18 intergrowths can be clearly resolved. By ... contents and templates in feed, we obtain two SAPO-34/18 catalysts, hierarchical and sandwich catalysts, with highly-mixed and separated SAPO-34 and SAPO-18 lattices respectively. The reduced diffusion distances of ... correlation between the synthesis conditions and structures of SAPO-34/18 intergrowth catalysts to further modify their ...
Tópico(s): Catalytic Processes in Materials Science
2021 - Nature Portfolio | Nature Communications
Bin Guan, Han Jiang, Xuesong Peng, Yanfei Wei, Ziqian Liu, Ting Chen, He Lin, Zhen Huang,
... cations modified copper based molecular sieve catalyst CuCe/SAPO-34. The SCR performance and low temperature hydrothermal stability of Cu/SAPO-34 and CuCe/SAPO-34 before and after 70 ℃ hydrothermal aging were ... of NH3-SCR reaction. For fresh samples, CuCe/SAPO-34 showed higher catalytic activity at the whole ... and above 400 ℃ in comparison to pure Cu/SAPO-34. For aged catalysts, CuCe/SAPO-34 exhibited higher efficiency at below 400 ℃ than Cu/SAPO-34, and showed more than 80 % NOx conversion ... that was only 225 ℃ to 450 ℃ for Cu/SAPO-34. The effect of co-cation Ce on ...
Tópico(s): Advanced Photocatalysis Techniques
2021 - Elsevier BV | Applied Catalysis A General
Wenhe Yu, Xiaowen Wu, Bohao Cheng, Tianyi Tao, Xin Min, Ruiyu Mi, Zhaohui Huang, Minghao Fang, Yangai Liu,
Abstract Silicoaluminophosphate zeolite (SAPO‐34) has been attracting increasing attention due to its excellent form selection and controllability in the chemical industry, as ... reaction conversion. However, as a microporous molecular sieve, SAPO‐34 easily generates carbon deposition and rapidly becomes ... In this review, the synthesis methods of conventional SAPO‐34 molecular sieves, hierarchical SAPO‐34 molecular sieves and nanosized SAPO‐34 molecular sieves are introduced, and the properties of the synthesized SAPO‐34 molecular sieves are described, including the phase, ...
Tópico(s): Mesoporous Materials and Catalysis
2021 - Wiley | Chemistry - A European Journal
Traditional microporous SAPO-11 molecular sieve was synthesized in Al2O3-P2O5-Dipropylamine-H2O system. To improve the mesoporosity aiming to overcome the diffusion limitations of zeolite, Hierarchical mesoporous SAPO-11 molecular sieve was synthesized via adding SAPO-11 seed into the Al2O3-P2O5-Dipropylamine-H2O system. Nitrogen physisorption analysis indicated that the synthesized SAPO-11 via seeding approach has additional mesoporosity with ... TEM analysis proofed the formation of hierarchical mesoporous SAPO-11 as spherical aggregate particles in contrast to ...
Tópico(s): Zeolite Catalysis and Synthesis
2021 - Elsevier BV | Journal of Organometallic Chemistry
Yuxiang Liu, Hai Yu, Xinchun Liu, Na Zhang, Xiaosheng Wang, Lu Li, Shitao Yu,
... of isomers in hydroisomerization of n-hexane, hierarchical SAPO-11 was employed to prepare Pt/SAPO-11 catalysts. Hierarchical SAPO-11 was prepared with fluoride ions via an ... the isomorphous substitution of silicon atoms. It endows SAPO-11 intra- and inter-crystalline mesopores and decreases ... of mono-branched iso-hexane. Compared to microporous SAPO-11, catalysts with hierarchical SAPO-11 have a higher selectivity of iso-hexane ... propose a facile and green approach to prepare SAPO-11 molecular sieves. The in-situ regulation method ...
Tópico(s): Polyoxometalates: Synthesis and Applications
2021 - Elsevier BV | Microporous and Mesoporous Materials
Qitong Cheng, Benxian Shen, Jichang Liu, Hui Sun, Di Wu, Lei Jiang, Peikun Yan, Xin Pu, Suhui Ou, Jigang Zhao,
... the coupling conversion of n -hexane-methanol. The SAPO-34@ZSM-5 core-shell composite has been ... SAC avoids the undesired phase transformation/dissolution of SAPO-34 caused by exposure to harsh basic conditions ... the nanosized ZSM-5 or physical mixture, the SAPO-34@ZSM-5 core-shell zeolite demonstrates a ... are obtained from the extracted species of spent SAPO-34@ZSM-5 in comparison with that of ... slowed down. The core-shell configuration of the SAPO-34@ZSM-5 composite diminishes the diffusion rate of methanol towards the SAPO-34 core layer and increases the coupling of ...
Tópico(s): Catalytic Processes in Materials Science
2021 - Elsevier BV | Microporous and Mesoporous Materials
Vahid Vatanpour, Majid Esmaeili, Shiva Chahvari, Majid Masteri‐Farahani,
... influences of the size and concentration of synthesized SAPO-34 nanozeolites on the morphological characteristics, water permeability and anti-fouling properties of PVDF/SAPO-34 ultrafiltration mixed matrix membranes were explored and compared with incorporation of commercial SAPO-34. The SAPO-34 is a hydrophilic zeolite with high pore ... The nature, size and shape of the synthesized SAPO-34 zeolites as well as the PVDF/SAPO-34 membrane structure were characterized by XRD, EDX ... contact angle and porosity revealed that when the SAPO-34 nanozeolites concentration in the casting solution and ...
Tópico(s): Membrane-based Ion Separation Techniques
2021 - Elsevier BV | Journal of environmental chemical engineering