Patent attributes
A reaction vessel and a reaction system having an annular tube with an inlet, an outlet, and at least one expandable section between the inlet and the outlet. The expandable section of the annular tube has a first shape and a second expanded shape. The expandable section of the annular tube expands to from the first shape to the second expanded shape in response to a change in the physical environment of the annular tube. When the expandable section of the annular tube is in the second expanded shape, the portions of the annular tube adjoining the expandable section of the annular tube are substantially less expanded.