On Tuesday 10 January 2006 11:02, baskara wrote: > Yang saya suka dari tujuan hybrid car adalah selain penghematan bahan > bakar minyak bumi, juga untuk mengurangi volume gas CO2 yang > dikeluarkan kendaraan. Sementara konsep "minyak jarak" di Indonesia > tujuannya hanya untuk mengurangi ketergantungan terhadap minyak bumi. > Volume CO2 yang dihasilkan mungkin sama saja (atau lebih?).
Minyak jarak itu jatropha oil kan? Jadi biodiesel ya? Setahu saya biodiesel lebih ramah lingkungan. Dari http://en.wikipedia.org/wiki/Biodiesel : Environmental benefits in comparison to petroleum based fuels include: - Biodiesel reduces emissions of carbon monoxide (CO) by approximately 50% and carbon dioxide by 78.45% on a net lifecycle basis because the carbon in biodiesel emissions is recycled from carbon that was already in the atmosphere, rather than being new carbon from petroleum that was sequestered in the earth's crust. (Sheehan, 1998) - Biodiesel contains fewer aromatic hydrocarbons: benzofluoranthene: 56% reduction; Benzopyrenes: 71% reduction. - It also eliminates sulfur emissions (SO2), because biodiesel does not include sulfur. - Biodiesel reduces by as much as 65% the emission of particulates, small particles of solid combustion products. - Biodiesel does produce more NOx emissions than petrodiesel, but these emissions can be reduced through the use of catalytic converters. The increase in NOx emmisions may also be due to the higher cetane rating of biodiesel. Properly designed and tuned engines may eliminate this increase. - Biodiesel has a higher cetane rating than petrodiesel, and therefore ignites more rapidly when injected into the engine. Ronny
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