Global oil demand is expected to rise by 850,000 barrels per day this year, the International Energy Agency (IEA) said on Thursday as it cut its growth estimate from 930,000 bpd expected last month. All the 850,000 bpd growth this year is poised to come from developing economies, with China leading the additional demand, the agency said in its closely-watched Oil Market Report for February. Petrochemical feedstock products are set to account for more than half of this year’s gains, compared with only a third…