Academic literature on the topic 'HZSM-12'

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Journal articles on the topic "HZSM-12"

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Zhang, Lei, Ming Ke, Zhaozheng Song, et al. "Improvement of the Catalytic Efficiency of Butene Oligomerization Using Alkali Metal Hydroxide-Modified Hierarchical ZSM-5 Catalysts." Catalysts 8, no. 8 (2018): 298. http://dx.doi.org/10.3390/catal8080298.

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Oligomerization of light olefin is an effective method to produce plentiful liquid fuels. However, oligomerization processes using microporous zeolites have severe problems due to steric hindrance. In this paper, oligomerization of butene using a series of new types of hierarchical HZSM-5 zeolite catalysts is studied. To obtain the modified HZSM-5 catalysts, HZSM-5 is treated with the same concentration of LiOH, NaOH, KOH, and CsOH aqueous solutions, respectively. It is demonstrated that the alkali treatment can effectively modify the acidity properties and hierarchical structure of the HZSM-5
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Feng, Gang, Ying-Ying Lian, Deqin Yang, Jianwen Liu, and Dejin Kong. "Distribution of Al and adsorption of NH3 and pyridine in ZSM-12: a computational study." Canadian Journal of Chemistry 91, no. 10 (2013): 925–34. http://dx.doi.org/10.1139/cjc-2013-0135.

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The distribution of Al and the adsorption of NH3 and pyridine in both Na-form and H-form ZSM-12 were investigated using dispersion-corrected density functional theory. It was found that the energy differences for Al atoms in the different T sites of ZSM-12 (both H form and Na form) were less than 0.3 eV, which indicates that the Al atoms could distribute in all kinds of T sites in ZSM-12. In addition, the small energy difference indicates that both H and Na atoms could stay in either the small cage or the main channel of ZSM-12. The adsorption of NH3 and pyridine on NaZSM-12 is weak, while the
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Silva, Antonio O. S., Marcelo J. B. Souza, Anne M. G. Pedrosa, Ana C. F. Coriolano, Valter J. Fernandes, and Antonio S. Araujo. "Development of HZSM-12 zeolite for catalytic degradation of high-density polyethylene." Microporous and Mesoporous Materials 244 (May 2017): 1–6. http://dx.doi.org/10.1016/j.micromeso.2017.02.049.

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Silva, A. O. S., M. J. B. Souza, J. M. F. B. Aquino, V. J. Fernandes Jr., and A. S. Araújo. "Coke removal of the HZSM-12 zeolite with different silica/alumina ratio." Journal of Thermal Analysis and Calorimetry 75, no. 2 (2004): 699–704. http://dx.doi.org/10.1023/b:jtan.0000027165.62244.ea.

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Araujo, Antonio S. "Catalytic properties of HZSM-12 zeolite in the n-heptane catalytic cracking." Reaction Kinetics and Catalysis Letters 84, no. 2 (2005): 287–93. http://dx.doi.org/10.1007/s11144-005-0221-6.

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Fawaz, Elyssa G., Darine A. Salam, Severinne S. Rigolet, and T. Jean Daou. "Hierarchical Zeolites as Catalysts for Biodiesel Production from Waste Frying Oils to Overcome Mass Transfer Limitations." Molecules 26, no. 16 (2021): 4879. http://dx.doi.org/10.3390/molecules26164879.

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Hierarchical crystals with short diffusion path, conventional microcrystals and nanocrystals of ZSM-5 zeolites were used for biodiesel production from waste frying oils and were assessed for their catalytic activity in regard to their pore structure and acidic properties. Produced zeolites were characterized using XRD, nitrogen adsorption–desorption, SEM, TEM, X-ray fluorescence, and FTIR. Pore size effect on molecular diffusion limitation was assessed by Thiele modulus calculations and turnover frequencies (TOF) were used to discuss the correlation between acidic character and catalytic perfo
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Bai, Xuefeng, Keyi Sun, Wei Wu, Pengfei Yan, and Jie Yang. "Methylation of naphthalene to prepare 2,6-dimethylnaphthalene over acid-dealuminated HZSM-12 zeolites." Journal of Molecular Catalysis A: Chemical 314, no. 1-2 (2009): 81–87. http://dx.doi.org/10.1016/j.molcata.2009.08.020.

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Kustov, A. L., T. W. Hansen, M. Kustova, and C. H. Christensen. "Selective catalytic reduction of NO by ammonia using mesoporous Fe-containing HZSM-5 and HZSM-12 zeolite catalysts: An option for automotive applications." Applied Catalysis B: Environmental 76, no. 3-4 (2007): 311–19. http://dx.doi.org/10.1016/j.apcatb.2007.06.006.

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Prajitno, Danawati Hari, Lenny Marlinda, Muhammad Al-Muttaqii, Ignatius Gunardi, and Achmad Roesyadi. "Hydrocracking of Cerbera manghas Oil with Co-Ni/HZSM-5 as Double Promoted Catalyst." Bulletin of Chemical Reaction Engineering & Catalysis 12, no. 2 (2017): 167. http://dx.doi.org/10.9767/bcrec.12.2.496.167-184.

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The effect of various reaction temperature on the hydrocracking of Cerbera manghas oil to produce a paraffin-rich mixture of hydrocarbons with Co-Ni/HZSM-5 as doubled promoted catalyst were studied. The Co-Ni/HZSM-5 catalyst with various metal loading and metal ratio was prepared by incipient wetness impregnation. The catalysts were characterized by XRD, AAS, and N2 adsorption-desorption. Surface area, pore diameter, and pore volume of catalysts decreased with the increasing of metals loading. The hydrocracking process was conducted under hydrogen initial pressure in batch reactor equipped wit
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Purnamasari, Amalia Putri, Meyga E. F. Sari, Desy T. Kusumaningtyas, Suprapto Suprapto, Abdul Hamid, and Didik Prasetyoko. "The Effect of Mesoporous H-ZSM-5 Crystallinity as a CaO Support on the Transesterification of Used Cooking Oil." Bulletin of Chemical Reaction Engineering & Catalysis 12, no. 3 (2017): 329. http://dx.doi.org/10.9767/bcrec.12.3.802.329-336.

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Transesterification of used cooking oil was carried out over calcium oxide supported on mesoporous H-ZSM-5 prepared from kaolin as solid base catalysts. Solid basic catalysts investigated in this study were characterized by XRD, FTIR spectroscopy, and N2 adsorption-desorption techniques. The XRD pattern showed peaks corresponding to the CaO and mesoporous ZSM-5 in the sample. The peak intensity of the CaO increased as CaO loading in ZSM-5 was increased. The characterization based on FTIR spectroscopy revealed that CaO/H-ZSM-5 solids have functional groups characteristics of both CaO and mesopo
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Dissertations / Theses on the topic "HZSM-12"

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Silva, Júnior José Roberto da. "Craqueamento de hidrocarbonetos naftênicos sobre zeólitas HZSM-12 modificadas – rendimento e seletividade a olefinas leves." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/8273.

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Submitted by Alison Vanceto (alison-vanceto@hotmail.com) on 2016-10-21T11:11:40Z No. of bitstreams: 1 TeseJRSJ.pdf: 5314232 bytes, checksum: 9352e78958e9a2f45a12e9a77f564bdd (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-11-08T18:37:37Z (GMT) No. of bitstreams: 1 TeseJRSJ.pdf: 5314232 bytes, checksum: 9352e78958e9a2f45a12e9a77f564bdd (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-11-08T18:37:44Z (GMT) No. of bitstreams: 1 TeseJRSJ.pdf: 5314232 bytes, checksum: 9352e78958e9a2f45a12e9a77f564bdd (MD5)<br>Made av
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COSTA, Maria Helena Santos. "Estudo da reação de desidro-aromatização não oxidativa do metano em reator de leito fixo diferencial com catalisador Ru-Mo//HZSM-12." Universidade Federal de Pernambuco, 2007. https://repositorio.ufpe.br/handle/123456789/6675.

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Made available in DSpace on 2014-06-12T18:06:45Z (GMT). No. of bitstreams: 2 arquivo7843_1.pdf: 2479507 bytes, checksum: 8251355ef5e3a83f3ad0883ce56333d9 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2007<br>As reservas de gás natural são consideradas uma importante fonte de energia e matéria-prima para as indústrias químicas e petroquímicas. Portanto, a conversão catalítica do metano, principal componente do gás natural, se apresenta de grande interesse. Entre os muitos diferentes processos catalíticos, a desidro-aromatização do m
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Lima, Stevie Hallen. "Degrada??o catal?tica de polietileno de alta densidade sobre a ze?lita HZSM." Universidade Federal do Rio Grande do Norte, 2009. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17613.

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Made available in DSpace on 2014-12-17T15:41:46Z (GMT). No. of bitstreams: 1 StevieHLpdf.pdf: 1475886 bytes, checksum: e83c49569bddebb612701e2de7e607bc (MD5) Previous issue date: 2009-08-31<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>In last years it has talked a lot about the environment and the plastic waste produced and discarded. In last decades, the increasing development of research to obtain fuel from plastic material, by catalytic degradation, it has become a very attractive looking, as these tailings are discarded to millions worldwide. These materials take a l
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Taco, Vasquez Sebastian. "Transformation of Acetone and Isopropanol to Hydrocarbons using HZSM-5 Catalyst." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7480.

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This research describes the production of hydrocarbons from acetone and isopropanol produced by the MixAlco process. The MixAlco process has two types of products: acetone and isopropanol. The effect of the temperature, weight hourly space velocity (WHSV), type of catalyst, feed composition, and pressure are studied. For the isopropanol reaction, the following conditions were used: HZSM-5 (280), 1 atm, 300–410°C, and 0.5–11.5 h–1, respectively. The temperature and WHSV affect the average carbon number of the reaction products. A product similar to commercial gasoline was obtained at T = 320
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