While it is clear that alternative fuels present a broad range of opportunities and potential benefits to the transportation sector, countries in Asia still have some ways to go before the large scale adoption of these fuels can be realised. Each of the alternatives comes with its unique set of challenges set within country-specific contexts.
Biofuels transformed from a niche energy source to a globally traded commodity that is a magnet for billions of investment dollars within a few years after the US and EU announced policies and incentives to support its increased use in 2004-2005. Asian governments were quick to follow in their footsteps and announced ambitious plans to promote biofuels production for both domestic consumption and export.
A recent report by USAID summarising the benefits and risks of biofuels development in Asia estimated total biofuels production in Asia to have grown more than five-fold since 2004, from just over two billion litres to almost 12 billion litres in 2008. Despite this accelerated growth biofuels only accounted for three percent of the region’s transport fuel mix.
The report pointed out that even at this scale it is evident that biofuels incur significant trade-offs and economic and environmental risks. Critics of biofuels argue that biofuels compete with food crops for land, water and agrichemicals, which aggravate food insecurity issues, contribute to higher food prices and adversely impact biodiversity. Biofuels also do not deliver cost effective carbon emissions reduction.
From a technical perspective, studies have shown biofuels to have lower calorific value (i.e. they have lower energy content) compared to conventional fuels. Agriculture uncertainty renders supply availability (of ethanol) unpredictable. In practice, the implementation of a biofuels mandate is not economically viable without substantial fiscal support in the form of government subsidies and financial incentives. Massive investments in the production and delivery infrastructure may also be needed to accommodate direct ethanol blended gasoline products, depending on the mandated level of ethanol in gasoline.
The USAID report purports that large scale production of biofuels is unlikely to make a significant contribution to Asia’s future transport energy demand. By 2030 biofuels is expected to account for an estimated 3-14 percent of the total transport fuel mix in China, India, Indonesia the Philippines, Thailand and Vietnam. This projection is predicated on the premise that these countries will rapidly expand cultivation of efficient first-generation biofuels crops on under-utilised land while promoting second-generation “cellulosic ethanol” using agricultural residues.
Electrical energy sources have their fair share of challenges to overcome. Infrastructural readiness is the immediate concern, as well as its feasibility over short distance travel. The gradual electrification of a light duty transportation fleet and the development of low-cost, affordable light-duty vehicles will require time. Battery technology advancements look promising but it is too early to tell if this can be applied on a broad-based basis.
LPG and CNG-compatible vehicles are already available but yet to become mainstream options due to costs constraints, as like solar-powered vehicles which have to successfully achieve miniaturisation of solar panels. There is also the issue of emissions of LPG and CNG compared to high quality clean conventional fuels.
Other alternatives under serious considerations include GTLs, BTLs and MTG. GTLs are synthetic liquid fuels derived from natural gas. While they burn cleaner than conventional fuels, current production volume is a fraction of demand and natural gas sources need to be available.
BTL fuels may be produced from almost any type of low-moisture biomass, residue or organic waste. This is the primary advantage as almost any type of biomass can be used, with little pre-treatment other than moisture control. However, high cost of production and low yield factor do not support its mass commercial application.
MTG converts crude methanol directly to low-sulfur, low-benzene gasoline that can be sold directly or blended with conventional refinery gasoline. Originally commercialised by ExxonMobil 20 years ago, production was discontinued in 1996 due to economics. However, escalating crude oil prices have revived interest in MTG products.
Asian countries continue to face persistent, broad challenges related to energy and environmental issues of varying degrees. The process of exploring, evaluating and deliberating the suitability of various transportation fuels options is highly complex. It involves many decision variables and thus cannot be lent to generalization. Policymakers need to understand their country-specific context in deciding an effective energy policy mix for their respective country.
The real policy challenge is to determine the optimal combination of fossil fuels and alternative fuels, after thoroughly considering macroeconomic drivers and conditions relevant to the country, and how to use conventional fuels to the country’s maximum advantage.
