نتایج جستجو برای: methanol synthesis

تعداد نتایج: 437338  

Journal: :Processes 2021

Traditionally, methanol is produced in large amounts from synthesis gas with heterogeneous Cu/ZnO/Al2O3 catalysts under steady state conditions. In this paper, the potential of alternative forced periodic operation modes studied using numerical optimization. The focus a well-mixed isothermal reactor two inputs, namely, CO concentration feed and total flow rate. Exploiting detailed kinetic model...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1391

in this thesis, we exploit a simple and suitable method for immobilization of copper(ii) complex of 4?-phenyl-terpyridine on activated multi-walled carbon nanotubes [amwcnts-o-cu(ii)-phtpy]. this nanostructure was characterized by various physico-chemical techniques. to ensure the efficiency and fidelity of copper species, the implementation of three-component strategies in click-chemistry all...

2012
Kok Siew Ng Jhuma Sadhukhan

Process to process material and heat integration strategies for bio-oil integrated gasification and methanol synthesis (BOIG-MeOH) systems were developed to assess their technological and economic feasibility. Distributed bio-oil generations and centralised processing enhance resource flexibility and technological feasibility. Economic performance depends on the integration of centralised BOIG-...

2017

Submit Manuscript | http://medcraveonline.com organic solvents like benzene, methanol, toluene are carcinogenic and can be toxic to human health and cause an environmental menace by polluting the atmosphere. The replacement of volatile organic solvents in organic reaction is an important aim of green chemistry [3,4]. Earliest known examples of organic synthesis in water include Wohler’s urea sy...

Journal: :Nature chemistry 2010
Bingjun Xu Xiaoying Liu Jan Haubrich Cynthia M Friend

Selective coupling of oxygenates is critical to many synthetic processes, including those necessary for the development of alternative fuels. We report a general process for selective coupling of aldehydes and methanol as a route to ester synthesis. All steps are mediated by oxygen-covered metallic gold nanoparticles on Au(111). Remarkably, cross-coupling of methanol with formaldehyde, acetalde...

Journal: :iranian journal of oil & gas science and technology 2013
hamed rashidi touba hamoule mohammad reza khosravi nikou ahmad shariati

msu-s mesoporous catalyst with [sio2]/[al2o3] ratio of 55 was synthesized using tetrapropylammonium hydroxide (tpaoh) as a structure directing agent and hexadecyltrimethylammonium bromide (ctab) as a surfactant. the catalytic activity of the calcined sample was evaluated for the dehydration of methanol to dimethyl ether (dme) in a vertical fixed bed microreactor at a weight hurly space velocity...

Journal: :Reaction Chemistry and Engineering 2021

A novel approach for the investigation of reaction kinetics using a polytropic miniplant reactor featuring highly resolved fibre optic temperature measurement and FTIR gas phase analysis is presented methanol synthesis.

Journal: :Chinese Journal of Catalysis 2023

ZnZrOx solid solution catalyst is an excellent in methanol synthesis from CO2 hydrogenation. It still highly aspiration to make any further improvement catalytic performance. In this work, prepared with different methods, resulting surface property. The by reflux ammonia (ZnZrOx-RA) exhibits higher selectivity of 95.2% and conversion 3.3% than that the obtained via co-precipitation (ZnZrOx-CP) ...

Journal: :Microbiology 1995
H H Xu J J Janka M Viebahn R S Hanson

Nucleotide sequence analysis of the mxcQ and mxcE loci, required for the synthesis of methanol dehydrogenase in Methylobacterium organophilum XX, has revealed two open reading frames that show significant similarity to sequences of prokaryotic two-component systems, especially MxaY and MxaX proteins of another methylotrophic bacterium, Paracoccus denitrificans. Cell-free extracts and DNA-column...

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