* Petcoke ban comes into effect around New Delhi on Wednesday
* Activists demand nationwide ban to fight rampant pollution
* Most petcoke to be replaced by coal imports
* Surge in Asia orders causes huge coal ship traffic jam
* Strong Asian coal demand pushes up specialist mining shares
By Sudarshan Varadhan and Henning Gloystein
NEW DELHI/SINGAPORE, Nov 1 (Reuters) - A ban on petroleum coke around the Indian capital of New Delhi starting from Wednesday will require the country to raise its imports of coal to replace the fuel, just as Asia is heading into the tightest market conditions for coal in years.
India's annual demand for petroleum coke, an energy intensive fuel that emits harmful sulphur oxides and ample carbon dioxide when burned, has doubled to 27 million tonnes in the past four years. The country imports about 14 million tonnes annually, mainly from the United States.
Its use was banned around New Delhi to rein in pollution. The country's environmentalists are trying to stop imports of petroleum coke, known as petcoke, which emits sulphur oxides that are known to cause lung disease and acid rain. replace petcoke, industries from dyeing units to brick kilns are switching to imports of coal.
The national capital region alone consumes 2.2 million tonnes of petcoke a year. A country-wide import ban would require replacing 14 million tonnes of petcoke a year with 24 million to 31 million tonnes of coal, according to industry calculations, most of which has to be imported.
Jamil Rahman, a coal trader in the central Indian state of Madhya Pradesh, said he has been getting enquiries about replacing local petcoke with Indonesian thermal coal.
Some enquiries were also made about replacing petcoke with high grade, low-sulphur coal from the U.S., traders said.
"Moving to coal is inevitable," said Lalit Goel, the head of a textile industry body around New Delhi.
The increased demand for coal to replace petcoke, which will largely have to be met by imports, coincides with increasing coal consumption in India for power generation.
India is the world's second-biggest buyer of foreign coal even though imports have held steady in the last two years because of rising local output.
But demand has picked up in 2017 and coal-fired power plants were left with only five days of inventories on average as of Oct. 26, compared with 15 days at the end of 2016.
"Indian coal imports will gain momentum in Q4 2017, especially for Indonesian coal," said Rodrigo Echeverri, head of hard commodities research at Noble Group NOBG.SI , at an industry event last week.
India's coal imports will top 18 million tonnes in October for the first time since the middle of 2016, according to ship tracking data on Thomson Reuters Eikon.
The jump in imports comes just as other major buyers across Asia have also stepped up purchases. Asian coal imports rose above 80 million tonnes in October, after stagnating between 60 million and 70 million tonnes a month for the last two years, the tracking data shows.
As a result, traders now expect the first coal supply shortfall in years, and spot Newcastle coal prices at the Australian port of Newcastle GCLNWCPFBMc1 have been hovering around $100 per tonne for weeks. That is up from just over $70 in the middle of the year and around $50 in the first half of 2016, before coal markets first started tightening after years of slump. FOR MINERS
The tight market is a concern for consumers just as the peak winter demand in the northern hemisphere looms.
But the rising demand is a boon for specialist thermal coal suppliers such as Swiss commodity merchant and miner Glencore GLEN.L , Australia's Whitehaven Coal WHC.AX , and Indonesia's Adaro Energy ADRO.JK , whose stocks have far outperformed those of diversified miners like BHP Billiton (LON:BLT) BHP.AX or Rio Tinto (LON:RIO) RIO.AX .
Demand is so strong that a traffic jam of dry-bulk carriers has built up off the eastern and southern coasts of Indonesia's island of Kalimantan, one of the world's biggest coal mining regions.
Shipping data in Thomson Reuters Eikon shows that over 100 ships are currently waiting off the region's coal ports, either loading or waiting to take on coal.
"Indian utilities have been buying a lot of low calorific coal recently, supplied mainly from Indonesia. The ships are now off Kalimantan waiting to load," said one trader involved in exporting Indonesian coal.
<^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ GRAPHIC: Asian coal imports
http://reut.rs/2z3SxcE GRAPHIC: Thermal coal specialist outperform diversified miners
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