State-run oil firms have proposed a Rs 57 per litre price for diesel they sell to industrial users as against Rs 34.80 a litre currently, as use of the fuel in sectors like power generation had seen an unprecedented growth.

Three oil companies have submitted a concept paper to the Petroleum Ministry for differential pricing of diesel for direct consumers like railways and power producers who they want to charge market price and limit subsidised sales to transport and agriculture sectors, official sources said.

Industrial units like power generators find subsidized diesel cheaper than freely priced fuel oil and naphtha, pushing demand that has forced refiners import the fuel to meet the requirement.

Last week, an industry brainstorming meeting with Oil Minister Murli Deora was informed that diesel demand in April-July had grown by 18 per cent, with bulk of the growth coming from industrial users like power plants.

Sources said the power sector had seen a whopping 152 per cent rise in demand in the first quarter to 53,000 tons, while fisheries and marine sector had seen a near-40 per cent growth.