I'd only use it if it said that it was made from hardwoods. At one time I made my own. I had a pit that I put (mostly) oak limbs into and set on fire. then I flipped a piece of steel over it when the wood looked like it was fully ablaze for a minute or so and the next day I broke it up and sorted it. It's a lot of work but I was much younger and good charcoal was hard to find. I'd make about 5 cu. ft. in several batches before I graded it. That was a long and dirty process.