Results 21 to 30 of about 9,508 (161)

Vitamin C‐Assisted Synthesis of Novel Cu‐SSZ‐13 Zeolite and Its High‐Efficiency Performance in Diesel Vehicle NOx Exhaust Purification

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Diesel vehicle‐derived NOx is a major pollutant, and NH3‐SCR with Cu‐SSZ‐13 is the mainstream abatement technology. In this study, vitamin C (Vc) was used as a crystal growth regulator to successfully synthesize Cu‐SSZ‐13‐Vc0.3 via the hydrothermal method. Experimental results demonstrate that the introduction of Vc significantly optimizes the
Siqi Wu, Xin Yan, Tianyu Li, Tianyi Fu, Yange Hou, Xinyan Zhang, Xin Zhang   +6 more
wiley   +1 more source

Polythiophenes and oligothiophenes in zeolite hosts [PDF]

, 1993
The polymerization of different thiophenes in the channels of molecular sieve zeolite hosts is described. Thiophene, 3-methyIthiophene, 2,2'-bithiophene, and terthiophene were introduced into dehydrated proton-, Cu(II)- or Fe(III)-containing zeolites ...
Bein, Bein, Cai, Caspar, Colaneri, Cox, Dian, Enzel, Enzel, Hotta, Inoue, Kanatzidis, Mermilliod-Thevenin, Murray, Neugebauer, Osterholm, P. Enzel, Pearce, Salmon, T. Bein   +19 more
core   +1 more source

n-Butane Isomerization over Acidic Mordenite [PDF]

Journal of Catalysis, 1995
Conversion of n-butane was studied between 523 K and 623 K over acidic mordenites with SiO2/Al2O3 ratios between 10 and 20. The main products were iso-butane, propane, and pentane. The selectivity to olefins, methane, ethane, C6 paraffins, and aromatics was lower than 4 mol% under all reaction conditions.
Asuquo, Raymond A., Eder-Mirth, Gabriele, Lercher, Johannes A.   +2 more
openaire   +2 more sources

Durene conversion in a methanol‐to‐jet process: Exploring conversion at 150–350°C over different acid catalysts

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Acid catalyzed conversion of durene by isomerization, disproportionation, and transalkylation is of interest to the development of a methanol‐to‐jet process to reduce the amount of durene in the kerosene. It was of interest to determine whether durene conversion could be performed at a temperature lower than 350°C.
Aida G. Velasco Ortiz, Risha Raju, Arno de Klerk   +2 more
wiley   +1 more source

Production of middle distillates through olefin oligomerization using ZSM‐5 as a catalyst

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract The global transportation sector relies heavily on gasoline (C5–C12) and diesel (C11–C24), which together account for approximately 60% of its energy needs. Driven by rapid industrialization and urbanization, diesel consumption is outpacing gasoline, with projections estimating global demand by 2035 at 27 million barrels per day for gasoline ...
Thembekile Hoyi, Masikana Milan Mdleleni, Ntalane Sello Seroka, Lindiwe Khotseng   +3 more
wiley   +1 more source

Effect of zeolite topology and reactor configuration on the direct conversion of CO2 to light olefins and aromatics [PDF]

, 2019
The direct transformation of CO2 into high-value-added hydrocarbons (i.e., olefins and aromatics) has the potential to make a decisive impact in our society. However, despite the efforts of the scientific community, no direct synthetic route exists today
Abou-Hamad, Edy, Caglayan, Mustafa, Cnudde, Pieter, De Wispelaere, Kristof, Dokania, Abhay, Dutta Chowdhury, Abhishek, Gascon, Jorge, Gevers, Lieven, Ould-Chikh, Samy, Ramirez, Adrian, Van Speybroeck, Veronique, Yarulina, Irina   +11 more
core   +1 more source

Impact Reactivation of a Hydrothermal System in Basalt in the Vargeão Dome Impact Structure, Brazil

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract As hydrous minerals have been observed in impact craters on Mars, impact‐generated hydrothermal systems (IGHSs) have been considered as potential habitats for life on that planet. The Vargeão Dome, a 12 km wide impact structure in southern Brazil, was formed in basalts with at least two hydrothermal alteration stages.
Jitse Alsemgeest, Fraukje M. Brouwer, Luis F. Auqué, Kirsten van Zuilen, Natalia Hauser, Wolf Uwe Reimold   +5 more
wiley   +1 more source

Engineering Catalysts at the Multiscale: Past, Present, and Future of Catalyst Manufacturing and Shaping Processes

ChemCatChem, Volume 18, Issue 1, 15 January 2026.
The image illustrates the journey of catalyst engineering across scales, emphasizing the design, shaping, and manufacturing of technical catalysts. It highlights how hierarchical structuring bridges properties and process innovation, showcasing the continuum between fundamental science and industrial practice that defines modern catalyst engineering ...
Ali M. Alkadhem, Eduardo Perez‐Botella, Swantje Pietsch‐Braune, Hend Omar Mohamed, Carlos A. Grande, Stefan Heinrich, Pedro Castaño   +6 more
wiley   +1 more source

Cu–Pd/Zeolite as Efficient Thermo‐Catalyst to Oxidize Low‐Concentration Methane

ChemCatChem, Volume 18, Issue 1, 15 January 2026.
Methane’s low concentration belies its warming impact and challenging catalytic abatement. We synthesise highly dispersed Cu–Pd on low‑cost mordenite (MOR) to oxidise 200 ppm CH4, achieving 90% conversion at 358 °C and stable operation for 100 h. Copper lowers Pd usage (0.10 wt% Pd) via synergistic dispersion and thermal stabilisation, surpassing Pd ...
Yuyin Wang, Yun Wang, Zihan Liu, Ying Li, Lin Yao, Xianfeng Fan, Tingzhen Ming, Xiaohua Lu, Liwen Mu, Wei Li   +9 more
wiley   +1 more source

Study of the Nature and Location of Silver in Ag-Exchanged Mordenite Catalysts. Characterization by Spectroscopic Techniques [PDF]

, 2013
 Catalysts based on Na-mordenite (symbolized as M) exchanged with 5, 10, and 15 wt % of Ag were characterized by X-ray photoelectron spectroscopy (XPS), extended X-ray absorption fine line structure (EXAFS), X-ray absorption near edge spectroscopy (XANES)
Aspromonte, Soledad Guadalupe, Boix, Alicia Viviana, Mizrahi, Martin Daniel, Ramallo Lopez, Jose Martin, Schneeberger, Florencia A.   +4 more
core   +3 more sources