The proven Turkish coal reserves, particularly of lignites, amount to 10 billion tons. The majority of these lignites are characterized by their high ash (14% to 42%), moisture (15% to 55%) and volatile matter (16% to 38%) contents. In addition, the lignites contain sulfur levels ranging from 1% to 5%. As most of these coals are consumed without any upgrading processes; high moistures, low calorific values and high sulfur contents become the main causes of coal based air pollution. However, the advanced coal cleaning technologies can achieve substantial reductions in coal-based emissions. In this paper, low carbonization tests were carried out on lignite samples from Istanbul-Yeniköy region. The results indicate that these low-rank coals can be upgraded to the desired quality both in terms of calorific value and sulfur content.