Results 31 to 40 of about 2,875 (187)

Conversion of Stearic Acid into Bio-Gasoline over Pd/ZSM-5 Catalysts with Enhanced Accessibility

Applied Sciences, 2019
Palladium supported on nanocrystalline ZSM-5 (n-ZSM-5, Si/Al = 32) and hierarchical ZSM-5 (h-ZSM-5) with different acidity (Si/Al = 33, 51, 122) were tested in the liquid-phase conversion of stearic acid under nitrogen atmosphere (6 bar).
Marta Arroyo, Laura Briones, José María Escola, David P. Serrano   +3 more
doaj   +1 more source

Spatial Evolution of Coke in ZSM‐5 Catalysts During Methanol‐to‐Hydrocarbons Conversion Revealed by In Situ X‐Ray Photoelectron Spectroscopy

Angewandte Chemie International Edition, EarlyView.
Coking is the central source of deactivation of zeolite catalysts. Using in situ XPS along with complementary methods, we identify differences in the formation kinetics and composition of surface coke on industrially relevant ZSM‐5 catalysts during MTH conversion, demonstrating the strong potential of this technique for studying catalyst deactivation ...
Luca Artiglia, Hannes Frey, Loïc Bénariac‐Doumal, Sung Sik Lee, Przemyslaw Rzepka, Jeroen A. van Bokhoven, Vladimir Paunović   +6 more
wiley   +1 more source

Synergistic Advanced Oxidation and Physicochemical Treatment Strategies for Antibiotic Removal and Resistance Mitigation in Water

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT The presence of antibiotics in water not only causes environmental pollution but also increases the growth of antibiotic‐resistant bacterial genes, which pose serious threats to human beings and other water residents. Large numbers of people are reportedly affected by the resistant bacterial genes, as many broad‐spectrum antibiotics are not ...
Amir Zada, Shohreh Azizi
wiley   +1 more source

Combined effect of increasing the post‐reformer temperature and adding red mud as a secondary catalyst in the thermocatalytic reforming of digestate

Biofuels, Bioproducts and Biorefining, EarlyView.
Abstract This work studies the combined effect of increasing the post‐reformer temperature and introducing red mud as a support catalyst in the thermocatalytic reforming (TCR®) of digestate. The TCR® method, developed by the Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT (abbreviated as Fraunhofer UMSICHT), is an extension
Hillary Onyishi, Johannes Neidel, Robert Daschner, Andreas Apfelbacher, Andreas Hornung   +4 more
wiley   +1 more source

Unlocking Enhanced Hydrogen Storage in Naphthalene via K‐Induced Acidity and Metal Dispersion in Dendritic Catalysts

Carbon and Hydrogen, EarlyView.
Dendritic micro‐mesoporous composite catalysts through K‐induced enhancement of acidity and metal dispersion were developed. ABSTRACT Novel dendritic ZSM‐22/DMSNs (ZD) micro‐mesoporous composites with center–radial pore structure and suitable acidity were developed by nano‐assembly strategy. Subsequently, Pt/ZD‐K catalysts were synthesized based on the
Dongze Li, Liang Qiao, Yutong Zou, Chunhui Zhou, Zhentao Liu, Penglei Ni, Xiaochun Zhu, Chunya Wang, Chunming Xu, Xilong Wang   +9 more
wiley   +1 more source

The Investigation of the Deactivation of the Metal‐Modified ZSM‐5 Zeolites for the Catalytic Dehydration of Glycerol

Carbon and Hydrogen, EarlyView.
During the glycerol dehydration over ZSM‐5 zeolite, the modification by metal promoters results in the suppression of the bicyclic and tricyclic aromatics over the modified ZSM‐5 zeolite catalysts. However, the issue of the fast deactivation still remains an apparent challenge, which requires more different perspectives to understand the deactivation ...
Yonghua Yu, Lili Yu, Yunxuan Ji, Dazhi Zhang, Hui Ding, Peidong Li, Shengjun Huang, Jiaxu Liu   +7 more
wiley   +1 more source

Dealumination of ZSM-5 zeolites by steaming.

NIPPON KAGAKU KAISHI, 1989
ゼオライトの物理的および花学的性質は,ゼオライト骨格構造中の四配位アルミニウムに大きく依存する。したがって,ゼオライト骨格構造中からの脱アルミニウムは,ゼオライト触媒における重要な問題である。このような観点から本研究ではスチーミング処理にともなうZSM-5型ゼオライトからの脱アルミニウムについて定量的な検討を加えた。SiO2/Al2O3モル比の異なるH-ZSM-5を調製しf・873K-1気圧でのスチーミングにともなう骨格アルミニウム量の変化を固体高分解能27Al-NMRスペクトル,FT-IRから求めた。1その結果,脱アルミニウムの速度はみかけ上ゼオライト骨格中の四配位アルミニウム濃度の二次に比例することが明ちかになった。この結果は,ゼオライト細孔内を自由に動き回る非局在化したプゴトン(H+)がSi ...
Kunio SUZUKI, Tsuneji SANO, Yoshimichi KIYOZUMI, Hiroyuki HAGIWARA, Shigemitsu SHIN, Haruo TAKAYA   +5 more
openaire   +2 more sources

Electrothermal Strategies for Upcycling Commodity Plastics

Carbon and Hydrogen, EarlyView.
Future development directions for electrothermal plastic upcycling. (1) Advanced catalyst design and in situ technology development; (2) AI‐assisted reaction process control and catalyst development; (3) Reactor scale‐up and optimization for real‐world plastic feedstock processing; and (4) Integration with renewable electricity and distributed energy ...
Zhe Wang, Chaoping Xu, Zhengwu Yang, Haoyu Yan, Yuming Gao, Jianing Guo, Songbo Yang, Han Hao, Jianhong Gong, Hongsheng Liu, Bo Jiang   +10 more
wiley   +1 more source

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

Carbon monoxide adsorption on NaY zeolite and impregnated with 5% niobium: Characteristics and fixed‐bed study

The Canadian Journal of Chemical Engineering, EarlyView.
Schematic of the CO adsorption process in a fixed‐bed column containing pure NaY zeolite and Nb‐modified NaY (NaY–5%Nb). On the left, breakthrough curves and temperature profiles highlight the dynamic performance and thermal effects during CO adsorption.
Elson Oliveira, Karina Querne de Carvalho, Erika Pereira Felix, Roberta C. P. Rizzo‐Domingues   +3 more
wiley   +1 more source