The multiplicity of steady states (static bifurcation behavior, SBB) in a novel circulating fluidizedbed (CFB) membrane reformer for the efficient production of hydrogen by steam reforming of heptane (model component of heavy hydrocarbons) is investigated. The present paper highlights the practical implications of this phenomenon on the behavior of this novel reformer with a special focus on hydrogen production. Two configurations are considered and compared. One has catalyst regeneration before gas-solid separation, and the other has catalyst regeneration after gas-solid separation. The multiplicity of the steady states prevails over ranges of a number of design and operating parameters with significant impacts on the performance of the reformer. The basis of process evaluation is focused on the net hydrogen production. The dependence of the behavior of this autothermal CFB is shown to be quite complex and to defy the simple logic of nonautothermal processes. The unit can be a very efficient hydrogen producer provided that its bifurcation behavior is well understood and correctly exploited.