Abstract: A modular shelving system includes height-adjustable second vertical members that receive horizontal supports. Each second vertical member is supported by a first vertical member. Each combined first vertical member and second vertical member can be fastened together at different locations so the second vertical member can be positioned at different heights. The modular shelving may have a base to receive and stabilize the first vertical members. At the top of each second vertical member there may be an adjustment mechanism. The adjustment mechanism may be adjusted upward to be pressure fit against an upper stationary object such as a ceiling to help stabilize the modular shelving.

Abstract: A modular shelving system includes height-adjustable second vertical members that receive horizontal supports. Each second vertical member is supported by a first vertical member. Each combined first vertical member and second vertical member can be fastened together at different locations so the second vertical member can be positioned at different heights. The modular shelving may have a base to receive and stabilize the first vertical members. At the top of each second vertical member there may be an adjustment mechanism. The adjustment mechanism may be adjusted upward to be pressure fit against an upper stationary object such as a ceiling to help stabilize the modular shelving.

Abstract: A two-stage oxygenation system for use with a fluidized bed reactor is provided. The oxygenation system includes an oxygenation vessel coupled to receive oxygen from a source of oxygen, and a separator vessel coupled to receive feed from a source of feed. The separator vessel is coupled to receive recovered oxygen from the oxygenation vessel and recycle from the fluidized bed reactor. The oxygenation vessel is coupled to receive feed and recycle from the separator and to discharge oxygenated feed and recycle for delivery to the fluidized bed reactor and the recovered oxygen for delivery to the separator vessel.