Results 101 to 110 of about 34,563 (277)
EcoEnergy, EarlyView.A tailored‐defect strategy employing sequential high‐temperature calcination and acetylacetone treatment was developed to generate framework defects in NaY zeolite while preventing the formation of strong acid sites. These defects facilitate electron transfer from Pd to the zeolite framework and stabilize the Pd2+ active sites, thereby conferring ...
Chunzheng Wang +9 more
wiley +1 more source
Preparação e caracterização de catalisadores heterogêneos para a produção de biodiesel etílico [PDF]
, 2010 Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Química, Florianópolis, 2010Estudou-se, neste trabalho, a influência de diferentes métodos de preparação nas propriedades ...
Almerindo, Gizelle Inácio
core
Ultrasonic Assisted Enzymatic Transesterification for Biodiesel Production
, 2018 Biodiesel is fatty acid methyl ester derived from vegetable oils and/or animal fats that reacts with an acyl acceptor. Biodiesel is beneficial in sustaining a healthy environment because of its biodegradable properties, renewabilty, and nontoxicity ...
Azianna Gusniah +5 more
core +1 more source
, 2020 Herein we propose an auto-tandem catalytic approach towards the preparation of poly(ester-ether)s from simple alkyl acrylates and diols. By combining oxa-Michael addition with transesterification the preparation of hydroxy functionalised acrylate ...
Karin, Ratzenböck +2 more
core +1 more source
EcoEnergy, EarlyView.A triflate‐functionalized Ni–Ce/MOF–OTf superacid enables low‐temperature (∼140°C) in situ upgrading of ultra‐deep heavy oil. It reduces viscosity by 92.11% in 12 h, maintains activity over cycles, and delivers 90.25% recovery with a lower carbon footprint by selective bond cleavage. ABSTRACT Ultra‐deep heavy oil is an important unconventional resource,
Li Wang +5 more
wiley +1 more source
Fish Scales: A Multifunctional Biomaterial from Nature
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.Fish scales demonstrate nature's solution to impact protection through overlapping multilayered architecture. This biological design combines mineralized surfaces with collagen networks to achieve both flexibility and fracture resistance. The structural principles inspire advanced protective materials and biomedical implants, where damage tolerance ...
Liyao Dong, Xiaojie Sun, Xiguang Chen
wiley +1 more source
In-situ transesterification reaction for biodiesel production
, 2014 Biodiesel synthesis can be conducted using transesterification of triglycerides in the presence of catalyst and alcohol. The oil extraction and transesterification steps are carried out separately for the conventional biodiesel production, which can ...
Johari, A. +5 more
core +1 more source
Recent Progress on Enzyme Immobilization: Materials, Strategies, and Applications
Food Bioengineering, EarlyView.Enzyme immobilization technology has undergone substantial evolution driven by advances in materials science. This review systematically examines the recent advances in enzyme immobilization since 2024, with a focused analysis of five major categories of enzyme carriers including covalent organic framework, metal‐organic frameworks, polymers, carbon ...
Shuran Wang +7 more
wiley +1 more source
Resources Chemicals and MaterialsThe catalytic performance of different acidic catalysts for diethyl oxalate synthesis from the one-step transesterification of dimethyl oxalate and ethanol was evaluated.
Naiwen Zhang +6 more
doaj +1 more source
Food Safety and Health, EarlyView.Natural processed cheeses showed a more favorable nutritional profile, including higher unsaturated fatty acids and better functional performance. A balanced fatty acid composition was identified as a key factor influencing meltability, oil separation, and overall quality of processed cheeses.
Shaimaa M. Hamdy +3 more
wiley +1 more source