U-GAS process

The gases leaving the pre-treater and gasifier are passed through heat exchangers to recover the sensible heat and are treated to remove the sulfur compounds. With air-blown operation, the product gas typically has a heat content of ca. 155 Btu/ft whereas if the gasifier is oxygen-blown, the product gas may have a heat content of ca. 300 Btu/ft  

---

Diho, R. J. Patel, J. G., U-gas process for production of hydrogen from coal. International Journal of Hydrogen Energy 1983, 8(3), 175-182. 

Tampella Corporation is commercializing the U-GAS process, which was developed by the Institute of Gas Technology. Tampella has constructed a 10-MW, integrated U-GAS-combined cycle power plant in Finland that uses coal, peat, and wood wastes as feedstocks. U-GAS incorporates a single-stage, fluid-bed gasifier in which coal reacts with steam and air at 950 to 1090°C at pressures... 

One such process selected was the Institute of Gas Technology s U-GAS process, for which China acquired a license to build the world s first commercial plant (in Wujin). The basic job was to come up with a cost-competitive way of producing, per day, 1.7 million normal cubic meters (Nm3) of town gas, 200,000 tons of methanol, and 7 megawatts of electricity, according to Lau. The government approved the project in 1991, ground was broken in March 1992, and the first phase of the project was... 

All the discussion so far is on the particle separation in a gas fluidized bed based on velocities very close to the minimum fluidization velocity of the jetsam. Particle separation can also be accomplished by employing velocities close to that of the terminal velocity of the particles. The U-Gas coal gasification process developed by the Institute of Gas Technology utilized the principle of terminal velocity for separating ash agglomerates from char in the coal gasifier. A comprehensive study on this subject using a fluidized bed similar to that of the U-Gas process has been published by Leppin and Sahay (1980). Some experiments were also carried out by Chen and Keairns (1978). 

Mason, D. and Patel, J. (1980) Chemistry of ash agglomeration in the U-GAS process. Fuel Processing Technology,... 

---