摘要:
A construction system comprises a lattice girder reinforcement and a formwork for producing double-skinned concrete ceiling or wall slabs, with two frames separated from each other. The rising reinforcement of the inner skin is bent towards the outer skin so that the top inner skin support edge remains undisturbed and extends to the top outer skin edge. It comprises a reinforced haunched concrete slab each end of which defines a slot through which an interconnecting tie bar extends. Abutting prefabricated slabs are aligned with respective connecting bars inserted into slots and joints between two abutting wall elements. A board with an open hole is slid on the rear end of the connecting bar and bears on the other surface of the wall elements and a turnbuckle at this end bears on the free surface of the board. For thermal insulation of the joints, thermal insulating mats adjacent thereto are so profiled as to produce a continuous space in the longitudinal direction of the joints, the profile of the outside of the space being broader than the inside. A thermally insulating bar with the same profile as the space is inserted therein.
摘要:
The invention relates to a process for producing hydrocarbons from carbon dioxide and hydrogen, wherein carbon dioxide is converted with hydrogen in the presence of a special catalyst. By means of the process according to the invention C5-C15 hydrocarbons which are of interest as fuels (benzine, diesel, kerosene) can be formed with very high selectivity. Furthermore, in the process C2-C4 hydrocarbons, which can be used as valuable starting materials in the chemical industry, are produced with good selectivity. In the process a high conversion of CO2 is already achieved without any recirculation of excess carbon dioxide. According to another aspect, the invention relates to the catalysts as such.
摘要:
The present invention relates to a monolithic solid catalyst for carrying out a heterogeneous catalytic chemical reaction in a reaction fluid which flows through the catalyst and comprises at least one educt, wherein the catalyst has at least one passage opening for the reaction fluid to flow through the catalyst.In order to obtain a larger and targeted yield and selectivity of the sought reaction products with a smaller design of the reactors, smaller energy feed and smaller reaction pressures and/or lower reaction temperatures, it is proposed according to the invention that, to increase the effectiveness of the chemical reaction, the catalyst has at least one mechanical oscillator by which, while carrying out the chemical reaction, the catalyst can be subjected to a mechanical frequency in the range of from 20 kHz to 2 GHz.
摘要:
A prefabricated, modular assembly for the building of a timber house, including a plurality of rectangular, panel elements. Each panel element has two rectangular panels each having two oppositely located first sides, and two oppositely located second sides. Each panel element is provided with two parallel, solid wood, continuous girders, each being positioned between and connected to the panels on a respective first side. The panels and the girders collectively form a box. One of the girders projects beyond the panels and the other girder is set back upon the panels by a distance corresponding to the girder projection to form a tongue and groove joint. The panels project beyond the ends of the girders at the second sides to form a continuously extending, rectangular receiving groove. The assembly also includes an orientating beam having a rectangular cross section insertable into a respective receiving groove for orientating the respective panel elements to one another. Adjacent panel elements are connected to each other using the tongue and groove joint. The inserted orientating beam abuts against each respective panel and forms a continuous free space with an end of each respective girder for the receiving of supply lines.