1. Provide concise answers to the following questions about syngas cleaning and upgrading:

1. List the four major kinds of inorganic contaminants and the two major kinds of organic contaminants in syngas.

2. Six distinct approaches for removing tar from syngas. List these and provide a brief description of each.

3. Provide definitions for adsorption and desorption, making clear the differences between these processes. Give a specific example of each in terms of syngas cleaning technology.

4. Provide generalized descriptions of steam reforming and water gas shift reaction. For each indicate specific applications in syngas cleaning and upgrading.

5. List 7 syngas upgrading technologies along with brief descriptions of the processes indicating unique features in comparison to the other technologies.