1. Gas Refining Technology Group, Gas Research Division, Research Institute of Petroleum Industry (RIPI), P.O. Box: 14665-137, 1485733111, Tehran, Iran
2. Gas Processing Institute (GPI), Research Institute of Petroleum Industry (RIPI), P.O. Box: 14665-137, 1485733111, Tehran, Iran
3. Natural Gas Sweetening Group, Gas Processing Institute (GPI), 1485733111, Tehran, Iran
4. Petrochemistry Research Division, Research Institute of Petroleum Industry (RIPI), P.O. Box: 14665-137, 1485733111, Tehran, Iran