Abstract: A fuel delivery pipe made of resin, comprises: a pipe body internally formed with a fuel passage; an inlet pipe for introducing fuel into the pipe body; and a plurality of injector attaching parts for distributing the fuel introduced into the pipe body to a plurality of injectors through the fuel passage, the inlet pipe having an internal diameter smaller than an internal diameter of the pipe body and being integrally formed at one end of the pipe body through a joint portion provided with a slant surface with a diameter gradually decreasing toward a root of the inlet pipe.

Abstract: A reaction vessel has a catalytic core, with an inlet for a first gas and for a second gas. The first and second gasses react in an exothermic reaction during passage through the catalytic core. The first gas passes through conduits which extend through the catalytic core, so as to be preheated and also so as to cool the catalytic core so that the catalyzed reaction proceeds in a preferred temperature range. The gasses are mixed at one end of the vessel in a mixing chamber, and are drawn through the catalytic core into a gathering chamber, from which the reacted gasses exit. A cooling chamber is provided for introduction of a cooling fluid about the periphery of the catalytic core, for drawing away any excess heat during operation.

Abstract: A process for synthesizing material uses an exothermic reactor which comprises a coolant shell, two concentric pipes provided within the shell, a catalyst bed packed between inner and outer ones of the concentric pipes, an introduction tube connected to the inner pipe through which a starting fluid is introduced, and a communication path enabling the fluid after the passage of the inner pipe to be passed through the catalyst bed in a direction opposite to the direction of the passage through the inner pipe, the coolant shell having an inlet and an outlet for a coolant arranged in such a way that the flow of the coolant is parallel to the flow of the fluid within the catalyst bed. The coolant on the outside and the starting fluid on the inside of the catalyst bed cools the bed in such a way as to produce a temperature distribution along the bed that follows a maximum reaction rate line (M in FIG. 1) relating the concentration of the methanol to the temperature of the starting fluid.

Abstract: A wetted wall type method of humidifying gas with a liquid which is composed, or mainly composed, of water wherein the liquid flows down a heated vertical wall to form a wetted wall and gas flows along the wetted wall in contact with the liquid on the wetted wall to increase the humidity contained in the gas, comprises supplying a greater amount of liquid than the amount of liquid used or evaporated for increasing the humidity, and recirculating the liquid which is not evaporated from an outlet of the wetted wall to a liquid supply portion, the amount of the flowing liquid being adapted to satisfy the following equation:q<5.99.times.10.sup.5 .GAMMA..sup.2.12 (1)wherein q is the heat flux in W/m.sup.2 K where W=watts, K=temperature in degrees Kelvin, and .GAMMA. is the amount of flowing water with regard to the mass of water per unit wet width in kg/ms.