Methanol synthesis

DELLIL_MED · 4 أبريل 2007، 3:44ص

Please send me any informations about methanol synthesis i am an process chemical engineer to prepare my memory.

11123743 · 14 أغسطس 2008، 3:20ص

Today, synthesis gas is most commonly produced from the methane component in natural gas rather than from coal. Three processes are commercially practiced. At moderate pressures of 1 to 2 MPa (10–20 atm) and high temperatures (around 850 °C), methane reacts with steam on a nickel catalyst to produce syngas according to the chemical equation:
CH4 + H2O → CO + 3 H2This reaction, commonly called steam-methane reforming or SMR, is endothermic and the heat transfer limitations place limits on the size of and pressure in the catalytic reactors used. Methane can also undergo partial oxidation with molecular oxygen to produce syngas, as the following equation shows:
2 CH4 + O2 → 2 CO + 4 H2this reaction is exothermic and the heat given off can be used in-situ to drive the steam-methane reforming reaction. When the two processes are combined, it is referred to as autothermal reforming. The ratio of CO and H2 can be adjusted to some extent by the water-gas shift reaction,
CO + H2O → CO2 + H2,to provide the appropriate stoichiometry for methanol synthesis.
The carbon monoxide and hydrogen then react on a second catalyst to produce methanol. Today, the most widely used catalyst is a mixture of copper, zinc oxide, and alumina first used by ICI in 1966. At 5–10 MPa (50–100 atm) and 250 °C, it can catalyze the production of methanol from carbon monoxide and hydrogen with high selectivity
CO + 2 H2 → CH3OHIt is worth noting that the production of synthesis gas from methane produces 3 moles of hydrogen for every mole of carbon monoxide, while the methanol synthesis consumes only 2 moles of hydrogen for every mole of carbon monoxide. One way of dealing with the excess hydrogen is to inject carbon dioxide into the methanol synthesis reactor, where it, too, reacts to form methanol according to the chemical equation
CO2 + 3 H2 → CH3OH + H2OAlthough natural gas is the most economical and widely used feedstock for methanol production, other feedstocks can be used. Where natural gas is unavailable, light petroleum products can be used in its place.

Alhinai_Shaima · 13 مارس 2016، 3:42ص

How to design the equation of methanol which is CH4+H2O= CO+3H2
By the plug flow reactor??
Help me please
Alhinai

system · 13 مارس 2016، 8:04ص

السلام عليكم
اطروحات عن انتاج المثانول
http://dspace.univ-biskra.dz:8080/jspui/bitstream/123456789/6466/1/SIMULATION%20D’UNE%20UNITÉ%20DE.pdf
http://www.univ-usto.dz/fac-chimie/images/gc/BELABBASABOUBAKRTARIQWALID.pdf
http://www.ummto.dz/IMG/pdf/MEMOIRE_MAGISTER_M-_HALOUANE.pdf
http://www.giulionatta.it/pdf/pubblicazioni/00226.pdf

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Alhinai_Shaima · 13 مارس 2016، 8:17ص

جميعا ان شاء الله
لوسمحت تعرف فكره عن
Design of plug flow reactor by the steam methane reforming I need calculation

system · 13 مارس 2016، 1:02م

السلام عليكم
http://www.owlnet.rice.edu/~ceng403/hysys/pfex.htm

Alhinai_Shaima · 23 مارس 2016، 12:44م

شكرا لك اخي
جزاك الله خير

Alhinai_Shaima · 23 مارس 2016، 12:49م

م.أم رنيم:

Today, synthesis gas is most commonly produced from the methane component in natural gas rather than from coal. Three processes are commercially practiced. At moderate pressures of 1 to 2 MPa (10–20 atm) and high temperatures (around 850 °C), methane reacts with steam on a nickel catalyst to produce syngas according to the chemical equation:
CH4 + H2O → CO + 3 H2This reaction, commonly called steam-methane reforming or SMR, is endothermic and the heat transfer limitations place limits on the size of and pressure in the catalytic reactors used. Methane can also undergo partial oxidation with molecular oxygen to produce syngas, as the following equation shows:
2 CH4 + O2 → 2 CO + 4 H2this reaction is exothermic and the heat given off can be used in-situ to drive the steam-methane reforming reaction. When the two processes are combined, it is referred to as autothermal reforming. The ratio of CO and H2 can be adjusted to some extent by the water-gas shift reaction,
CO + H2O → CO2 + H2,to provide the appropriate stoichiometry for methanol synthesis.
The carbon monoxide and hydrogen then react on a second catalyst to produce methanol. Today, the most widely used catalyst is a mixture of copper, zinc oxide, and alumina first used by ICI in 1966. At 5–10 MPa (50–100 atm) and 250 °C, it can catalyze the production of methanol from carbon monoxide and hydrogen with high selectivity
CO + 2 H2 → CH3OHIt is worth noting that the production of synthesis gas from methane produces 3 moles of hydrogen for every mole of carbon monoxide, while the methanol synthesis consumes only 2 moles of hydrogen for every mole of carbon monoxide. One way of dealing with the excess hydrogen is to inject carbon dioxide into the methanol synthesis reactor, where it, too, reacts to form methanol according to the chemical equation
CO2 + 3 H2 → CH3OH + H2OAlthough natural gas is the most economical and widely used feedstock for methanol production, other feedstocks can be used. Where natural gas is unavailable, light petroleum products can be used in its place.

السلام علكم
اخي لوسمحت بخصوص عمليه انتاج الهيدروجين بطريقه steam methane reforming
ايهما افضل في حاله استخدام ماده حفازه هل النيكل فقط او استخدام النيكل مع مواد أخرى كالألمنيوم
ارجو ان تفيدوني في هذا لموضوع
شكرا جزيلا

system · 23 مارس 2016، 11:24م

السلام عليكم
هذه اطروحات فيها كا ما تريدن
http://www.cder.dz/download/Art4-2_4.pdf

http://www.google.dz/url?url=http://theses.univ-poitiers.fr/4282/2008-Le-Valant-Anthony-These.pdf&rct=j&q=&esrc=s&sa=U&ved=0ahUKEwiH5fvR1NjLAhWMlxoKHe8mCpU4FBAWCB4wAg&usg=AFQjCNEhRSBIOLzc1vRMCyVhFEpUGUc1tw
http://www.google.dz/url?url=http://www.univ-setif.dz/Tdoctorat/images/stories/pdf_theses/facultes1/TEC/Th%25C3%25A8se-Doctorat-Chibane.pdf&rct=j&q=&esrc=s&sa=U&ved=0ahUKEwjn7_yu2tfLAhXJSBQKHdRADc44ChAWCCswBA&usg=AFQjCNGx12AJpvCnVJdEQaALwXleup8vcg

http://www.google.dz/url?url=http://www.lcgn.usthb.dz/IMG/r%25C3%25A9sum%25C3%25A9-ouzna.PDF&rct=j&q=&esrc=s&sa=U&ved=0ahUKEwjn7_yu2tfLAhXJSBQKHdRADc44ChAWCBkwAQ&usg=AFQjCNHafI471L9X7ONQfRXDAb-Ky5OgvQ

http://www.google.dz/url?url=http://www.cea.fr/content/download/3096/14677&rct=j&q=&esrc=s&sa=U&ved=0ahUKEwjY2qb31tfLAhVHSBQKHUFbAYoQFgg-MAg&usg=AFQjCNE4p4_VdFgTpTagr23F18OC08xm9A
http://www.google.dz/url?url=http://mon.univ-montp2.fr/claroline/backends/download.php%3Furl%3DL1ZhcG9yZWZvcm1hZ2VfZXRfUE9YLnBkZg%253D%253D%26cidReset%3Dtrue%26cidReq%3DGMCH213_002&rct=j&q=&esrc=s&sa=U&ved=0ahUKEwjY2qb31tfLAhVHSBQKHUFbAYoQFggyMAY&usg=AFQjCNHhX3Mp4ETiCbY0Z4Y51VlEOgSsKw

http://www.google.dz/url?url=http://www.ummto.dz/IMG/pdf/MEMOIRE_MAGISTER_M-_HALOUANE.pdf&rct=j&q=&esrc=s&sa=U&ved=0ahUKEwjY2qb31tfLAhVHSBQKHUFbAYoQFggmMAQ&usg=AFQjCNHP-qiWKKRecRLArBBsHeBUJT4LaQ

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system · 23 مارس 2016، 11:50م

السلام عليكم
مقارنة بين المحفزات
http://www.google.dz/url?url=http://www.mdpi.com/2073-4344/3/2/563/pdf&rct=j&q=&esrc=s&sa=U&ved=0ahUKEwjiv7HW29jLAhUCthoKHcQODc0QFggrMAM&usg=AFQjCNEOIPFTLg5WiRIFrVbAQexMm0cd2g
http://www.google.dz/url?url=http://dx.doi.org/10.4236/ojpc.2013.32011&rct=j&q=&esrc=s&sa=U&ved=0ahUKEwjiv7HW29jLAhUCthoKHcQODc0QFghDMAc&usg=AFQjCNFpeSY0l_xJHRjmkvsKZ4F22_xt1Q

http://www.google.dz/url?url=http://about.elsevier.com/pdf/chemeng-vsi/97_mbodji.pdf&rct=j&q=&esrc=s&sa=U&ved=0ahUKEwiMotP429jLAhWECBoKHYqWDlY4ChAWCBMwAA&usg=AFQjCNENEDZTsuyOj2FtOq6a1Xo1IJC7Xw

http://www.google.dz/url?url=http://www.itcp.kit.edu/deutschmann/download/2013_Roussiere_CatRefMethaneinPresenceofCO2andH2OatHighPress_Dr_rernat_KIT_fi

Alhinai_Shaima · 24 مارس 2016، 1:22ص

شكرا لك ع المبادره الطيبه
جزيت خيرا