Results 11 to 20 of about 485,699 (306)

Synthesis of biodiesel from sunflower oil over potassium loaded alumina as heterogeneous catalyst: The effect of process parameters [PDF]

open access: yesHemijska Industrija, 2016
Heterogeneous catalysis is in recent focus of research for biodiesel production from vegetable oils because of advantages such as easy separation and reuse of catalysts, although homogeneous catalysis is most commonly used method.
Marinkovic Milos M.   +6 more
doaj   +1 more source

Preparation and characterization of mixed rare earth hydroxide by co- precipitation method [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2021
The aim of this research was to determine the optimum parameters for synthesis and characterization of mixed rare earth hydroxide (for use as a catalyst) through co-precipitation, with sodium hydroxide as precipitation agent at pH 12.
Wilasinee Kingkam   +6 more
doaj   +1 more source

Macrolactonization of methyl 15-hydroxypentadecanoate to cyclopentadecanolide using KF-La/γ-Al2O3 catalyst

open access: yesRoyal Society Open Science, 2022
It has been a challenge to synthesize macrolide musk in excellent yields with high purity. KF-La/γ-Al2O3 catalyst was prepared from a highly basic mesoporous framework using a mild method.
Haijun Cheng   +5 more
doaj   +1 more source

Nano-Size Layered Manganese-Calcium Oxide as an Efficient and Biomimetic Catalyst for Water Oxidation Under Acidic Conditions: Comparable To Platinum [PDF]

open access: yes, 2013
Inspired by Nature's catalyst, a nano-size layered manganese-calcium oxide showed a low overvoltage for water oxidation in acidic solutions, which is comparable to platinum.Institute for Advanced Studies in Basic Sciences and the National Elite ...
Allakhverdiev, Suleyman I.   +8 more
core   +2 more sources

Monometallic cerium layered double hydroxide supported Pd-Ni nanoparticles as high performance catalysts for lignin hydrogenolysis [PDF]

open access: yes, 2020
Monometallic cerium layered double hydroxides (Ce-LDH) supports were successfully synthesized by a homogeneous alkalization route driven by hexamethylenetetramine (HMT).
Bruneel, Els   +7 more
core   +1 more source

On inhibiting runaway in catalytic reactors [PDF]

open access: yes, 1978
We consider the problem of heat and mass transfer in porous catalyst pellets. Both the steady and time dependent operating characteristics are studied. Accurate approximate equations are derived from the basic governing equations of motion.
Cohen, Donald S., Matkowsky, Bernard J.
core   +1 more source

Metal-Catecholate Frameworks as Solid Basic Catalysts [PDF]

open access: yesTopics in Catalysis, 2016
Metal catecholate frameworks, based on 2,3,6,7,10,11-hexahydroxytriphenylene and bivalent metal ions (Ni2+, Cu2+, Zn2+, Mg2+, Ca2+, Sr2+ and Ba2+) were synthesized, characterized with powder X-ray diffraction and N2 physisorption, and evaluated as catalysts in Knoevenagel condensation and Michael addition reactions.
Valvekens, Pieterjan   +3 more
openaire   +1 more source

Experimental and modeling studies on the synthesis and properties of higher fatty esters of corn starch [PDF]

open access: yes, 2009
This paper describes a systematic study on the synthesis of higher fatty esters of corn starch (starch laurate and starch stéarate) by using the corresponding vinyl esters.
Aburto   +24 more
core   +1 more source

Preparação e propriedades de zeólitas faujasita contendo cátions amônio Preparation and properties of faujasite zeolites containing ammonium cations

open access: yesQuímica Nova, 2010
Sodium faujasite zeolites with Si/Al ratio of 1.4 and 2.5 were exchanged with methylammonium cations. The influence of framework aluminum and ion exchange degree in their basic properties were evaluated.
Karina Arruda Almeida   +1 more
doaj   +1 more source

Polyoxometalate-intercalated layered double hydroxides as efficient and recyclable bi-functional catalysts for cascade reactions [PDF]

open access: yes, 2016
The polyoxometalate (POM) intercalated-layered double hydroxides (LDHs) have been widely used as heterogeneous catalysts. However, the application of POM-LDHs as bi-functional catalysts for cascade reaction has seldom been studied comparing with the ...
Angelescu   +41 more
core   +1 more source

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