Bensin & angka oktan
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Bensin & angka oktan
Bensin & angka oktan
Gasoline consists of a complex mixture of hydrocarbons. Most of these are alkanes with 4-10 carbon atoms per molecule. Smaller amounts of aromatic compounds are present. Alkenes and alkynes may also be present in gasoline.
Gasoline is most often produced by the fractional distillation of petroleum, also known as crude oil (it is also produced from coal and oil shale). The crude oil is separated according to different boiling points into fractions. This fractional distillation process yields approximately 250 mL of straight-run gasoline for each liter of crude oil. The yield of gasoline may be doubled by converting higher or lower boiling point fractions into hydrocarbons in the gasoline range. Two of the main processes used to perform this conversion are cracking and isomerization.
In cracking, high molecular weight fractions and catalysts are heated to the point where the carbon-carbon bonds break. Products of the reaction include alkenes and alkanes of lower molecular weight than were present in the original fraction. The alkanes from the cracking reaction are added to the straight-run gasoline to increase the gasoline yield from the crude oil. An example of a cracking reaction is:
alkane C13H28 (l) → alkane C8H18 (l) + alkene C2H4 (g) + alkene C3H6 (g)
In the isomerization process, straight chain alkanes are converted into branched chain isomers, which burn more efficiently. For example, pentane and a catalyst may react to yield 2-methylbutane and 2,2-dimethylpropane. Also, some isomerization occurs during the cracking process, which increases the gasoline quality.
In internal combustion engines, the compressed gasoline-air mixtures have a tendency to ignite prematurely rather than burning smoothly. This creates engine knock, a characteristic rattling or pinging sound in one or more cylinders. The octane number of gasoline is a measure of its resistance to knock. The octane number is determined by comparing the characteristics of a gasoline to isooctane (2,2,4-trimethylpentane) and heptane. Isooctane is assigned an octane number of 100. It is a highly branched compound that burns smoothly, with little knock. On the other hand, heptane is given an octane rating of zero. It is an unbranched compound and knocks badly.
Straight-run gasoline has an octane number of about 70. In other words, straight-run gasoline has the same knocking properties as a mixture of 70% isooctane and 30% heptane. Cracking, isomerization, and other processes can be used to increase the octane rating of gasoline to about 90. Anti-knock agents may be added to further increase the octane rating. Tetraethyl lead, Pb(C2H5)4, was one such agent, which was added to gas at the rate of up to 2.4 grams per gallon of gasoline. The switch to unleaded gasoline has required the addition of more expensive compounds, such as aromatics and highly branched alkanes, to maintain high octane numbers.
http://chemistry.about.com/cs/howthings ... 401a_2.htm
Gasoline consists of a complex mixture of hydrocarbons. Most of these are alkanes with 4-10 carbon atoms per molecule. Smaller amounts of aromatic compounds are present. Alkenes and alkynes may also be present in gasoline.
Gasoline is most often produced by the fractional distillation of petroleum, also known as crude oil (it is also produced from coal and oil shale). The crude oil is separated according to different boiling points into fractions. This fractional distillation process yields approximately 250 mL of straight-run gasoline for each liter of crude oil. The yield of gasoline may be doubled by converting higher or lower boiling point fractions into hydrocarbons in the gasoline range. Two of the main processes used to perform this conversion are cracking and isomerization.
In cracking, high molecular weight fractions and catalysts are heated to the point where the carbon-carbon bonds break. Products of the reaction include alkenes and alkanes of lower molecular weight than were present in the original fraction. The alkanes from the cracking reaction are added to the straight-run gasoline to increase the gasoline yield from the crude oil. An example of a cracking reaction is:
alkane C13H28 (l) → alkane C8H18 (l) + alkene C2H4 (g) + alkene C3H6 (g)
In the isomerization process, straight chain alkanes are converted into branched chain isomers, which burn more efficiently. For example, pentane and a catalyst may react to yield 2-methylbutane and 2,2-dimethylpropane. Also, some isomerization occurs during the cracking process, which increases the gasoline quality.
In internal combustion engines, the compressed gasoline-air mixtures have a tendency to ignite prematurely rather than burning smoothly. This creates engine knock, a characteristic rattling or pinging sound in one or more cylinders. The octane number of gasoline is a measure of its resistance to knock. The octane number is determined by comparing the characteristics of a gasoline to isooctane (2,2,4-trimethylpentane) and heptane. Isooctane is assigned an octane number of 100. It is a highly branched compound that burns smoothly, with little knock. On the other hand, heptane is given an octane rating of zero. It is an unbranched compound and knocks badly.
Straight-run gasoline has an octane number of about 70. In other words, straight-run gasoline has the same knocking properties as a mixture of 70% isooctane and 30% heptane. Cracking, isomerization, and other processes can be used to increase the octane rating of gasoline to about 90. Anti-knock agents may be added to further increase the octane rating. Tetraethyl lead, Pb(C2H5)4, was one such agent, which was added to gas at the rate of up to 2.4 grams per gallon of gasoline. The switch to unleaded gasoline has required the addition of more expensive compounds, such as aromatics and highly branched alkanes, to maintain high octane numbers.
http://chemistry.about.com/cs/howthings ... 401a_2.htm
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Re: Bensin & angka oktan
Gelar tikernya liat dari jauh
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Re: Bensin & angka oktan
artine opo yo....? Ada kamus...? 

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Re: Bensin & angka oktan
Straight Run Gasoline = bensin mentah yang dihasilkan dari proses penyulingan minyak bumi, konon biasanya hanya memiliki RON 70
Utk meningkatkan RON ke atas 80 dilakukan proses Isomerisasi & Catalytic Reformer (di kilang juga)
Sehabis itu barulah dicampur dengan zat bernama HOMC (High Octane MoGas Component), volume HOMC yang digunakan konon bisa mencapai 10 - 20% dari total volume
Konon zat HOMC yang digunakan pada bensin RON 92 dan 95 di Indonesia adalah Aromatic & Olefin, sedangkan di negara2 maju digunakan Highly Branched Alkene krn HBA ini emisinya lebih ramah tapi lebih mahal.
Demikian hasil diskusi dengan hopeng ane yang ahli kimia.
Nah skg tinggal direnungkan aja...........jika ada zat yang mampu meningkatkan angka Oktan dari 88 ke 95 hanya dengan volume bbrp puluh / bbrp ratus cc saja utk 50 L Gasoline, maka kilang2 gak akan pakai HOMC lagi donk ??
Note :
Tidak bermaksud menitik beratkan thd produk tertentu yah, ini berlaku secara general, karena begitu banyak produk yang claim bisa meningkatkan RON scr signifikan, baik buatan dalam & luar negeri, produk luar negeri-pun banyak yg "San Ci Pa"

Utk meningkatkan RON ke atas 80 dilakukan proses Isomerisasi & Catalytic Reformer (di kilang juga)
Sehabis itu barulah dicampur dengan zat bernama HOMC (High Octane MoGas Component), volume HOMC yang digunakan konon bisa mencapai 10 - 20% dari total volume
Konon zat HOMC yang digunakan pada bensin RON 92 dan 95 di Indonesia adalah Aromatic & Olefin, sedangkan di negara2 maju digunakan Highly Branched Alkene krn HBA ini emisinya lebih ramah tapi lebih mahal.
Demikian hasil diskusi dengan hopeng ane yang ahli kimia.
Nah skg tinggal direnungkan aja...........jika ada zat yang mampu meningkatkan angka Oktan dari 88 ke 95 hanya dengan volume bbrp puluh / bbrp ratus cc saja utk 50 L Gasoline, maka kilang2 gak akan pakai HOMC lagi donk ??
Note :
Tidak bermaksud menitik beratkan thd produk tertentu yah, ini berlaku secara general, karena begitu banyak produk yang claim bisa meningkatkan RON scr signifikan, baik buatan dalam & luar negeri, produk luar negeri-pun banyak yg "San Ci Pa"

Last edited by Turboman on Wed Nov 14, 2012 2:39, edited 2 times in total.
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Re: Bensin & angka oktan
semoga pertamina denger om ya
jadi pertamax bisa rp 6000............. 


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Re: Bensin & angka oktan
HOMC itu apakah proprietary, atau ada komposisinya yang bisa dilihat seperti MSDS?
Apakah HOMC itu campuran semacam acetone, toluene, alkohol?
Apakah HOMC itu campuran semacam acetone, toluene, alkohol?
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Re: Bensin & angka oktan
Konon HOMC yg digunakan di indonesia = Aromatic & Olefinilhami wrote:HOMC itu apakah proprietary, atau ada komposisinya yang bisa dilihat seperti MSDS?
Apakah HOMC itu campuran semacam acetone, toluene, alkohol?
Kalo di negara maju = Highly Branched alkene
CMIIW
barang ginian pasti produsennya mengeluarkan MSDS krn produsen HOMC pasti persh kingkong juga.
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Re: Bensin & angka oktan



Masih penasaran juga ya...?


Ini harus dirayakan nih kepenasarannya om Turbo.

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Re: Bensin & angka oktan
Bukannya di trit sebelah sudah dibeberkan dikit, hasil pengujian dari om dengan nick "mecho off"...?
Silakan kontak dia om, dia yang udah ngetes sendiri di lab nya TAM.
Ngga dapet nomer telponnya? Perlu dibantu oleh yang punya trit sebelah...?

Silakan kontak dia om, dia yang udah ngetes sendiri di lab nya TAM.
Ngga dapet nomer telponnya? Perlu dibantu oleh yang punya trit sebelah...?

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Re: Bensin & angka oktan
Kalo ane sih mmg selalu curious dlm segala hal teknik proses produksi
Sekalian yg terkait otomotip kita gelar dan bahas bersama
Sekalian yg terkait otomotip kita gelar dan bahas bersama

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Re: Bensin & angka oktan
Kalo itu di sebelah bisa lgs digelar aja data data-nya, biar menjadi diskusi bersama seluruh SM-ers. Kalo spt kata A Hok : "langsung aja dipajang di website angka-angka nya"VanzMatic wrote:Bukannya di trit sebelah sudah dibeberkan dikit, hasil pengujian dari om dengan nick "mecho off"...?
Silakan kontak dia om, dia yang udah ngetes sendiri di lab nya TAM.
Ngga dapet nomer telponnya? Perlu dibantu oleh yang punya trit sebelah...?
Note : trit ini utk pencerahan bersama, tidak bermaksud menitik beratkan thd produk merek tertentu.
krn banyak produk yg membingungkan di masyarakat, baik buatan dalam & luar negeri, sekalian kita bahas tuntas dah.
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Re: Bensin & angka oktan
Monggo, silahkan hubungin, om... Kan om yang penasaran... ane sih sudah terjawab kebutuhan ane ttg bbm bermutu bagus dan beroktan tinggi, ngga perlu lagi aa' uu' bingung cari solusi, ngga perlu lagi bingung maen campur ini itu ini itu yang mana hasilnya malah bikin jeblok.
Silakan om, toh dari 2 tabloid bertema otomotif, semua juga sudah mengetes sendiri dan sudah dipaparkan hasilnya dari sisi performa. Itu juga media yang independen (I hope). Hasil pengujian performa, secara logika tolol saya, kalau dari sisi bahan bakarnya tidak menunjukkan kenaikan mutu dan oktan, apa iya terjadi kenaikan performa....?
Dan sudah banyak juga orang2 yang jauuuuhh lebih matang pengalamannya di bidang otomotif, baik itu praktisi, modifikator, tester, sampai kepada sesepuh sesepuh dunia otomotif. Pembuktian dari mereka, sudah lebih dari cukup, menurut saya yang awam ini. Apalagi, mereka juga tidak menolak untuk dikontak untuk dikonfirm ulang pembuktian pembuktian mereka.
Kenapa saya bilang begini?
Karena di akhir statement om, menyatakan
Lanjuuut om...
Silakan om, toh dari 2 tabloid bertema otomotif, semua juga sudah mengetes sendiri dan sudah dipaparkan hasilnya dari sisi performa. Itu juga media yang independen (I hope). Hasil pengujian performa, secara logika tolol saya, kalau dari sisi bahan bakarnya tidak menunjukkan kenaikan mutu dan oktan, apa iya terjadi kenaikan performa....?
Dan sudah banyak juga orang2 yang jauuuuhh lebih matang pengalamannya di bidang otomotif, baik itu praktisi, modifikator, tester, sampai kepada sesepuh sesepuh dunia otomotif. Pembuktian dari mereka, sudah lebih dari cukup, menurut saya yang awam ini. Apalagi, mereka juga tidak menolak untuk dikontak untuk dikonfirm ulang pembuktian pembuktian mereka.
Kenapa saya bilang begini?
Karena di akhir statement om, menyatakan
yang kemudian om Turbo tambahkan note kan?Nah skg tinggal direnungkan aja...........jika ada zat yang mampu meningkatkan angka Oktan dari 88 ke 95 hanya dengan volume bbrp puluh / bbrp ratus cc saja utk 50 L Gasoline, maka kilang2 gak akan pakai HOMC lagi donk ??

Lanjuuut om...

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Re: Bensin & angka oktan
Ada alat oktan meter yang tinggal dicelup saja. Misal premium di test kelihata ada beberapa sampel yang oktannya 90.
Kenapa nggak ditampilkan hasil test dengan oktan meter tersebut, trus dipublikasi disini + komentar dari Roy Suryo yang menyatakan foto tersebut tidak dipalsukan.
Kenapa nggak ditampilkan hasil test dengan oktan meter tersebut, trus dipublikasi disini + komentar dari Roy Suryo yang menyatakan foto tersebut tidak dipalsukan.
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Re: Bensin & angka oktan
Saya pake juga minyak urut,tapi saya dibelakang om TurbomanVanzMatic wrote:![]()
![]()
![]()
Masih penasaran juga ya...?![]()
![]()
Ini harus dirayakan nih kepenasarannya om Turbo.
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Re: Bensin & angka oktan
Bagus om, silakan...!nugroho bagor wrote:Saya pake juga minyak urut,tapi saya dibelakang om TurbomanVanzMatic wrote:![]()
![]()
![]()
Masih penasaran juga ya...?![]()
![]()
Ini harus dirayakan nih kepenasarannya om Turbo.

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Re: Bensin & angka oktan
spt ini ?ilhami wrote:Ada alat oktan meter yang tinggal dicelup saja. Misal premium di test kelihata ada beberapa sampel yang oktannya 90.
Kenapa nggak ditampilkan hasil test dengan oktan meter tersebut, trus dipublikasi disini + komentar dari Roy Suryo yang menyatakan foto tersebut tidak dipalsukan.

http://www.shatox.com/octanemeter-k.html
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Re: Bensin & angka oktan
Kalo konsumen murni mestinya akan appreciate dgn segala artikel2 pencerahan & monggo ramaikan trit ini dgn pengetahuan2 yang rekan2 miliki, supaya makin melengkapi tulisan nubie yang sgt basic ini & berguna bagi orang banyak.
hayuu coba di sini siapa konsumen murni sejati angkat tangann......
hayuu coba di sini siapa konsumen murni sejati angkat tangann......

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Re: Bensin & angka oktan
Ngga masalah mau sales alat atau bukan, silakan ukur..Turboman wrote:spt ini ?ilhami wrote:Ada alat oktan meter yang tinggal dicelup saja. Misal premium di test kelihata ada beberapa sampel yang oktannya 90.
Kenapa nggak ditampilkan hasil test dengan oktan meter tersebut, trus dipublikasi disini + komentar dari Roy Suryo yang menyatakan foto tersebut tidak dipalsukan.
http://www.shatox.com/octanemeter-k.html
*Bukan sales alat ukur oktan*
Minimal, kalau ngukur yg merk A, B, C atau D, silakan sertakan saksi dari merk ybs, untuk menjamin kemurnian bensin yang diukur+ditambahin aditif.
Monggo...

Eh, apa ane perlu acung tangan kalau ane konsumen murni selama 7 bulan terakhir?

Ps:
Masukan aja... Kalau mau ngetes, ambil sampel yang dari pom Mr. "P", ambil sampel yang dari pom bernomor kepala 31 dan 34 yaa.. Cuman masukan aja.
Silakan dilanjoot....

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Re: Bensin & angka oktan
Isomerisation
Isomerisation refers to chemical rearrangement of straight-chain hydrocarbons (paraffins), so that they contain branches attached to the main chain (isoparaffins). This is done for two reasons:
they create extra isobutane feed for alkylation
they improve the octane of straight run pentanes and hexanes and hence make them into better petrol blending components.
Isomerisation is achieved by mixing normal butane with a little hydrogen and chloride and allowed to react in the presence of a catalyst to form isobutane, plus a small amount of normal butane and some lighter gases. Products are separated in a fractionator. The lighter gases are used as refinery fuel and the butane recycled as feed.
Pentanes and hexanes are the lighter components of petrol. Isomerisation can be used to improve petrol quality by converting these hydrocarbons to higher octane isomers.

So, jadi memproduksi bensin Oktan tinggi scr massal butuh proses lumayan kompleks juga
Isomerisation refers to chemical rearrangement of straight-chain hydrocarbons (paraffins), so that they contain branches attached to the main chain (isoparaffins). This is done for two reasons:
they create extra isobutane feed for alkylation
they improve the octane of straight run pentanes and hexanes and hence make them into better petrol blending components.
Isomerisation is achieved by mixing normal butane with a little hydrogen and chloride and allowed to react in the presence of a catalyst to form isobutane, plus a small amount of normal butane and some lighter gases. Products are separated in a fractionator. The lighter gases are used as refinery fuel and the butane recycled as feed.
Pentanes and hexanes are the lighter components of petrol. Isomerisation can be used to improve petrol quality by converting these hydrocarbons to higher octane isomers.

So, jadi memproduksi bensin Oktan tinggi scr massal butuh proses lumayan kompleks juga
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Re: Bensin & angka oktan
Saya angkat tangan om turbo sebenarnya simpel sih kenapa sampai thrit ke 3 untuk hasil lab ya ckckckckVanzMatic wrote:Ngga masalah mau sales alat atau bukan, silakan ukur..Turboman wrote:spt ini ?ilhami wrote:Ada alat oktan meter yang tinggal dicelup saja. Misal premium di test kelihata ada beberapa sampel yang oktannya 90.
Kenapa nggak ditampilkan hasil test dengan oktan meter tersebut, trus dipublikasi disini + komentar dari Roy Suryo yang menyatakan foto tersebut tidak dipalsukan.
http://www.shatox.com/octanemeter-k.html
*Bukan sales alat ukur oktan*
Minimal, kalau ngukur yg merk A, B, C atau D, silakan sertakan saksi dari merk ybs, untuk menjamin kemurnian bensin yang diukur+ditambahin aditif.
Monggo...
Eh, apa ane perlu acung tangan kalau ane konsumen murni selama 7 bulan terakhir?
Ps:
Masukan aja... Kalau mau ngetes, ambil sampel yang dari pom Mr. "P", ambil sampel yang dari pom bernomor kepala 31 dan 34 yaa.. Cuman masukan aja.
Silakan dilanjoot....
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Re: Bensin & angka oktan
Harganya USD 2400 lebihnugroho bagor wrote: Saya angkat tangan om turbo sebenarnya simpel sih kenapa sampai thrit ke 3 untuk hasil lab ya ckckckck
mahal !
Mending test di Corelab / Petrolab jauh lebih ekonomis.
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Re: Bensin & angka oktan
Dulu apa sekarang, om.....?AD74YA wrote:Memantau dulu ya...



" It is not the eyes that are blind, but the hearts "
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Re: Bensin & angka oktan
Dulu, sekarang, dan masa depan.
*udah kayak bahasa Sun Tzu
*udah kayak bahasa Sun Tzu
Anda sudah TEST DRIVE belum?...
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Re: Bensin & angka oktan
Wokeylah kalao begindang....AD74YA wrote:Dulu, sekarang, dan masa depan.
*udah kayak bahasa Sun Tzu

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