نتایج جستجو برای: methanol synthesis

تعداد نتایج: 437338  

Journal: :Applied sciences 2021

With the increase in global energy requirements, utilization of fossil fuels has also increased, which caused warming. In this study, a process integration framework based on an mix system is proposed to simultaneously produce two cleaner (methanol and H2). Aspen Plus used develop models followed by their techno-economic assessment. Case 1 considered base case process, where coal–biomass gasifi...

Journal: :Fuels 2023

Poly(oxymethylene) dimethyl ether (OME) are a much-discussed and promising synthetic renewable fuel for reducing soot and, if produced as e-fuel, CO2 emissions. OME production is generally based on the platform chemical methanol an intermediate. Thus, cost strongly dependent cost. This work investigates from methanol. Seven routes providing methanolic formaldehyde solutions conceptually designe...

2006
David Lesthaeghe Bart De Sterck Veronique Van Speybroeck Guy B. Marin Michel Waroquier

Light olefins, which are vital components for the petrochemical industry, are traditionally obtained through the refinement of crude oil. However, the rapidly increasing demand of oil-based chemicals calls for the development of new technologies based on alternative natural sources. Among these processes, the methanol-to-hydrocarbons (MTH) technology is one of the most promising and currently e...

Journal: :Bioresources and Bioprocessing 2022

Abstract ?-Alkenes (terminal alkenes) are important fuel and platform chemicals that mainly produced from petroleum. Microbial synthesis might provide a sustainable approach for ?-alkenes. In this work, we engineered the methylotrophic yeast Pichia pastoris to produce long-chain (C15:1, C17:1 C17:2) ?-alkenes via decarboxylation of fatty acids. Combinatorial engineering, including enzyme select...

2012
Yuri L. Dorokhov Tatiana V. Komarova Igor V. Petrunia Olga Y. Frolova Denis V. Pozdyshev Yuri Y. Gleba

Many plants release airborne volatile compounds in response to wounding due to pathogenic assault. These compounds serve as plant defenses and are involved in plant signaling. Here, we study the effects of pectin methylesterase (PME)-generated methanol release from wounded plants ("emitters") on the defensive reactions of neighboring "receiver" plants. Plant leaf wounding resulted in the synthe...

Synthesis of nickel oxide nanoparticles (NiO NPs) was carried out by Marrubium astranicum leaf extract. The average of particle sizes for NiO NPs was 40 nm. NiO NPs modified carbon paste electrodes in the absence (CPE/NiO NPs) and the presence of sodium dodecyl sulfate (CPE/NiO NPs/SDS) were examined for the electrocatalytic oxidation of methanol in alkaline solutions. The cyclic volta...

Nowadays, hydrogen and methanol are attractive prospects because of lower emission compared to the other energy sources and their special application in fuel cell technology, which are now widely regarded as key energy solution for the 21st century. These two chemicals also can be utilized in transportation, distributed heat and power generation and energy storage systems. In this study, a nove...

Fatemeh Shahdadi, Hamid Sarhadi, Shima Omidi,

Background: Nowadays, natural antioxidants are used to replace synthetic antioxidants for delaying or preventing the oxidation of edible oils. In this study, phenolic compounds and antioxidant properties of methanol extracts of Spirulina microalgae (Arthrospira platensis) were measured. Methods: Phenolic content was measured by Folin–Ciocalteau method and antioxidant activity was measured by th...

Journal: :Molecular medicine reports 2015
Cheng Yao Cheng Long Jin Jang-Hee Oh Inn Gyung Oh Chi-Hyun Park Jin Ho Chung

Melanin protects the skin against ultraviolet radiation by scattering incoming light and absorbing diverse free radicals. Agents that increase melanin synthesis in melanocytes may reduce the risk of photodamage and skin cancer. The present study investigated the effect of a methanol extract of Ardisia crenata (AC) on melanogenesis in B16F10 cells. Treatment of cultured B16F10 cells with AC extr...

Journal: :Nature Catalysis 2022

Copper-based catalysts for the hydrogenation of CO2 to methanol have attracted much interest. The complex nature these catalysts, however, renders elucidation their structure–activity properties difficult. Here we report a copper-based catalyst with isolated active copper sites methanol. It is revealed that single-atom Cu–Zr Cu1–O3 units contributes solely synthesis around 180 °C, while presenc...

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