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Biofuls are considered as an option to reduce greenhouse gases emission, increase energy supply diversity and security of supply, as well as an opportunity for job creation and rural development. First of all, biofuls technologies have been promoted as a means for reducing the carbon intensity of the transport sector. Hence, in the last decade biofuels production has been driven by governmental policies. The key instruments widely adopted to foster production and increase consumption have been mandatory blending targets, tax exemptions and sibsidies. As one of the most powerful instruments, biofuel mandates require fuel producers to produce a pre-defined amount (or share) of biofuels and blend them with petroleum fuel. National biofuels mandates are in place 35 countries and partially in place in 6 countries. In this study, we reviewed status of global biofuels policies to reduce greenhouse gases in the European Union, United States and other countires worldwide. Especially, we discussed representative biofuels mandates policies same as Renewable Fuel Standard (RFS, US), Renewable Transport Fules Obligation (RTFO, UK) in transport sector.

요약 일반적으로 황분계 부취제는 연료가스에 인한 가스중독 발화 폭발 등의 사고를 방지하고 배출가 , , , 스에 의해 연료 가스 누출의 즉각적으로 손쉽게 검출할 수 있도록 그리고 도시가스와 LPG, LNG 같은 연료가스에 첨가 사용하고 있다 본 연구에서는 새로운 비황분계 부취제 를 사용 . (K-Petro S-Free) 한 혼합연료의 엔진 성능과 배출가스 LPG (CO, THC, CO 2 , NO x , SO 2 특성을 살펴보았다 새로운 ) . 비황분계 부취제를 를 혼합한 연료 여름용 겨울용 와 현재 사용 중인 황분계 부취제 40mg/kg LPG ( , ) 를 혼합한 연료의 엔진 성능과 배출가스 특성을 실험하였다 비황분계 (EM, ethyl mercaptan) LPG . 부취제를 혼합한 연료의 엔진 성능은 황분계 부취제를 혼합한 연료와 비교할 때 비슷한 LPG LPG 결과를 보여 주었다 한편 비황분계 부취제를 혼합한 연료의 엔진 배출가스 중 . , LPG CO, THC, CO 2 , NO x 은 황분계 부취제를 혼합한 연료와 비교할 때 비슷한 특성을 보였다 그러나 에서 LPG . 2,000rpm 배출가스 중 SO 2 은 비황분계 부취제를 혼합한 연료가 황분계 부취제를 혼합한 연료보다 LPG LPG 감소하는 우수한 결과를 보였다 83% .주요어 : 비황분계 부취제 연료 배출가스 , LPG , Abstract -In general, odorants are added to fuel gases, such as LPG, LNG and city gas, to prevent gas poisoning, ignition, explosion, or other accident caused by fuel gases, and to enable immediate and easy detection of fuel-gas leakage by emitting an offensive smell. This study describes a study on the performance and exhaust emissions (CO, THC, CO 2 , NO x , SO 2 ) characteristics of liquefied petroleum gas (LPG) engine using LPG fuel with new sulfur free odorant (K-Petro S-Free). New sulfur free odorant (40 mg/kg) was added to 2 type LPG fuels for summer, and winter and it was used in performance and exhaust emissions, compare to LPG fuel with sulfur containing odorant (EM, ethyl mercaptan). Engine performance using LPG with sulfur free odorant was similar to LPG with sulfur-containing odorant. Exhaust emissions (CO, THC, CO 2 , NO x ) of LPG with sulfur free odorant were also similar characteristics, compare with sulfur containing odorant. Especially, SO 2 emission using LPG with K-Petro S-Free odorant was more reduced 83 % than LPG with sulfur containing odorant(EM) at 2000 rpm.

Biogas production and utilization are an emerging alternative energy technology. Biogas is produced from the biological breakdown of organic matter through anaerobic digestion. Biogas can be utilized for various energy sectors such as space heating, electricity generation and vehicle fuel. Especially, to be utilized as vehicle fuel, raw biogas needs to be upgraded that is mainly the removal of carbon dioxide to increase the methane content up to more than 95 ~ 97 vol% in some cases, similar to the composition of fossil-based natural gas. Usage of Biogas as a fuel of vehicles have an effect of reducing CO2 emission compared to fossil fuels. Biomethane which is produced by upgrading of biogas is regarded as a good alternative energy and usage of clean energy is encouraged to deal with air pollution and waste management as well as production of clean energy. Recently, biogas projects for vehicle fuel are newly being launched and Korea government have also announced a plan for investment to develop biogas as a transport fuel. In this study, it is aimed to examine the potential feasibility of biomethane as a transport fuel. As a results, the status of biomethane, quality standard, quality characteristics, and upgrading technology of biogas were investigated to evaluate of biogas as a vehicle fuel of transportation.

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