Results 51 to 60 of about 595 (174)
Biofuels, Bioproducts and Biorefining, Volume 20, Issue 3, Page 1235-1243, May/June 2026.Abstract The long‐term viability of Jatropha curcas as a biodiesel feedstock has been widely debated. Many early initiatives failed to deliver consistent economic returns despite promising environmental attributes. This study re‐evaluated J. curcas‐based systems within an integrated environmental–economic framework, focusing on their potential role in ...
Eduardo Sansão Sozinho Maurício +3 more
wiley +1 more source
Assessing gold-bearing potential of the Kvarhush area (Western slope of the Urals, Perm krai) [PDF]
МинералогияThe paper examines the morphology and composition of native gold from placers of the Kvarkush region (Perm krai). Using optical and electron microscopy, 149 native gold grains from three placers are studied.
M.D. Shamsutdinov, S.V. Petrov
doaj +1 more source
Activities of Copper Chromite Catalysts for Dehydrogenation of Ethanol
The Journal of the Society of Chemical Industry, Japan, 1970 脱水素用亜クロム酸銅系触媒の活性究明の一助とするために, 純エタノールの脱水素反応に対して, 細孔内拡散の影響度を考慮した速度評価を行なった。すなわち, 工業用円柱触媒 [A,(CuO-Cr2[CuO4]系);径:0.490～0.495cm, 高さ:0.217～0.407cmとG-13,(Cr2[CuO4]系);径:0.476～0.479cm, 高さ:0.215～0.285cm]のそれぞれ, 代表寸法(ΣVpi/ΣSOi;ΣVpi:見かけ容積の和,ΣS0i:見かけ外表面積の和)の異なるものに対して, 触媒Aは 200～300℃で, 触媒 G-13 は 200～350℃ で, 常圧・等温流通系操作によって, 触媒見かけ単位容積当りおよび単位質量当りの, 外部抵抗の無視できる場合の定常速度 (ra ...
Shigeaki KASAOKA +2 more
openaire +2 more sources
ChemistrySelect, Volume 11, Issue 17, 5 May 2026.Efficient hydrogenation of furfural to furfuryl alcohol over a Cu‐impregnated mesoporous Cr‐silicate catalyst synthesized with PDADMAC, achieving complete conversion and 86% selectivity under mild ethanolic conditions. ABSTRACT A 10 wt.% Cu‐impregnated chromium silicate catalyst was synthesized via a sol–gel method followed by hydrothermal treatment ...
Vinicius L. Medeiros +3 more
wiley +1 more source
Outline of a Washing Treatment to Improve Electric Arc Furnace Slag Environmental Behavior
steel research international, Volume 97, Issue 5, Page 2541-2558, May 2026.This study evaluates a water‐washing treatment for electric arc furnace slag to reduce the leaching of hazardous elements (Cr, Ba, Mo, and V), enabling its reuse. The process effectively decreases leachate concentrations. Using the treated slag as a substitute aggregate in concrete reduces greenhouse gases emissions by 42.5% compared to landfilling ...
Luca Testini +4 more
wiley +1 more source
Evaluation of Ophiolite Complex Impact and Pollution Indices of Groundwater Resources in Jovein Area (NE Iran) [PDF]
Journal of Advances in Environmental Health ResearchBackground: Potential ore deposits and mining activities can cause soil and groundwater pollution with heavy metals, posing risks to human health. This study aimed to identify heavy metal sources, their transfer patterns, and contamination levels in the ...
Raheleh Hatefi +2 more
doaj +1 more source
Production of fatty alcohol from palm oil methyl ester [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2007 Fatty alcohol is an important raw material for the production of surfactants, and is currently in demand by markets and has a high potential for growth. Moreover, fatty alcohol can be made from methylester that is produced from fats and natural oil.
Tongurai, C. +2 more
doaj
Green Synthesis and CatalysisLignocellulose biomass, without any doubts, is one of the most promising, and, therefore, one of the most studied sources for the production of biofuels, valuable chemicals and “green” solvents. Furfural – a product of biomass catalytic conversion – is a
Victoria S. Zhuravleva +4 more
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Extraction of platinum metals during procssing of chromium ores from dunnite deposits
Записки Горного института, 2018 Currently, the main raw materials sources of platinum group metals in Russia are complex sulfide copper-nickel ores of the Taimyr region and placer deposits.
G. V. Petrov +2 more
doaj +1 more source
Scientific ReportsClimatic changes have been emerged as the key concerns that must be tackled in recent decades. One of the prominent climatic disasters is the phenomenon of global warming caused by unwarranted emissions of greenhouse gases mainly carbon dioxide.
Israf Ud Din +6 more
doaj +1 more source