Abstract:
The invention relates to a process for the removal of CO2 from acid gas by cryogenic distillation performed in two steps. The feed mixture is first distilled at high pressure (at least 45 bar) in a first distillation column. The top product or a part thereof is then, after heating, subjected to a second distillation step at a lower pressure (lower than 45 bar). The top product of the second distillation step is methane of high purity (more than 99 mol.%). The bottom product of the second distillation step is recycled back to the first distillation column. The method according to the invention allows complete separation of methane also at higher level of acidic components, is economical and does not result in solid CO2 build-up, which is a common problem in cryogenic distillation.
Abstract:
Method for modifying a solar thermal power plant (2) operating on conventional oil based technology into a hybrid solar thermal power plant (1), wherein the method comprises: • providing an oil based solar thermal power plant (2) comprising a solar collection system with at least one radiation absorber tube containing a heat transfer oil to be heated by means of the solar collection system, • providing an molten salts solar thermal power plant, (4) wherein the molten salts solar thermal power plant comprises a solar collection system to heat a molten salts mixture • coupling of the respective plants such that the hybrid solar thermal power plant is configured to heat medium temperature steam that is generated by the oil based solar power plant by means of the molten salts mixture thereby producing high temperature steam and subsequently supplying it to a steam turbine (40) to generate electricity.
Abstract:
A back-up boiler system for a solar thermal power plant (201) for transferring solar energy into electricity, said back-up boiler system comprising a combustion chamber (70) and a convection section (80) in fluid connection with said combustion chamber (70), wherein in the convection section (80) at least a first heat exchanger (92) is provided for heating a molten salts mixture of the solar thermal power plant and a second heat exchanger (90) for pre-heating boiler feed water of the solar thermal power plant, wherein the back-up boiler system (25) is configured to allow selection between only providing heat to the first heat exchanger (92), only providing heat to the second heat exchanger (90) and providing heat to both heat exchangers (90, 92), preferably dependent on availability of solar radiation and/or dependent on demand of power generation. The invention also relates to a solar thermal power plant (201) for transferring solar energy into electricity and a method for operating a solar thermal power plant.
Abstract:
Disclosed is a process for the production of hydrogen in a reactor system comprising a steam reforming reaction zone comprising a reforming catalyst and a membrane separation zone comprising a hydrogen-selective membrane. The process involves a reaction system of so-called open architecture, wherein the reforming zone and the membrane separation zone operate independently of each other. The invention provides the heat for the reforming reaction through heat exchange from liquid molten salts, preferably heated by solar energy.
Abstract:
Method for producing synthesis gas for methanol production The present invention relates to a method for producing synthesis gas from a hydrocarbon containing feed, which synthesis gas is particularly suitable for subsequent use in methanol production. In this method, a feed (100) is divided into two streams, wherein one stream is subjected to catalytic partial oxidation (CPO) (2) and the other stream is subjected to steam reforming (5) followed by a water gas shift reaction (51). The two streams are then recombined and can be used further in methanol synthesis (6). The recombined stream preferably has an R ratio, being a molar ratio (H 2 -C0 2 )/(CO+C0 2 ), in the range of 1.9 - 2.2 and preferably about 2. The invention further relates to a method for producing methanol from a hydrocarbon containing feed, wherein first synthesis gas is obtained according to the method of the invention, which synthesis gas is further used to produce methanol. Also, the invention relates to a method of adapting an existing methanol plant to the methanol production process of the invention.
Abstract:
Method for producing synthesis gas for methanol production The present invention relates to a method for producing synthesis gas from a hydrocarbon containing feed, which synthesis gas is particularly suitable for subsequent use in methanol production. In this method, a hydrocarbon containing feed, particularly natural gas (100), is subjected to catalytic partial oxidation (CPO) (2), followed by the water gas shift (WGS) (4) reaction of a part of the reformed feed. At least part of the shifted feed is then subjected to hydrogen purification, preferably by pressure swing adsorption (PSA) (5) to obtain pure hydrogen (108), which hydrogen is subsequently combined with the remaining parts of the feeds to yield synthesis gas particularly suitable for methanol synthesis. The recombined stream preferably has an R ratio, being the molar ratio (H 2 -C0 2 )/(CO+C0 2 ), in the range 1.9-2.2 and preferably about 2. The invention further relates to a method for producing methanol from a hydrocarbon containing feed, wherein first synthesis gas is obtained according to the method of the invention, which synthesis gas is further used to produce methanol.
Abstract:
Disclosed is a method of transporting C0 2 by ship for the purpose of storage in the ocean. The C0 2 is transported at a temperature between -25°C and +25°C, and under a pressure that is sufficiently high for the C0 2 to be in a liquid or supercritical state. The choice of temperature/pressure conditions for the C0 2 enables the transport of C0 2 one way to be effectively combined with transport of compressed natural gas (CNG) the other way. Ships can be used that have relatively cheap tubular containment equipment similar to the type normally used for CNG but with lower pressure and not subject to cyclic thermal and mechanical effects of pressurizing and depressurizing.
Abstract translation:公开了为了在海洋中储存的目的,用船运送CO 2的方法。 CO 2在-25℃和+ 25℃之间的温度下运输,并且在足够高的压力下使CO 2处于液体或超临界状态。 CO 2的温度/压力条件的选择使得CO 2的输送能够有效地与压缩天然气(CNG)的运输有效结合。 可以使用具有类似于通常用于CNG的类型的相对便宜的管状容纳设备的船舶,但是具有较低的压力并且不受加压和减压的循环热和机械效应的影响。
Abstract:
Disclosed is a process for the production of ammonia comprising a step wherein synthesis gas is formed by catalytic partial oxidation. Also disclosed is a process of producing urea, wherein ammonia is formed in a process involving a step of catalytic partial oxidation, and carbon dioxide formed in the same process is reacted with said ammonia so as to form urea.
Abstract:
Disclosed is a concrete tank for very large LNG tanks. The invention utilizes membrane technology in concrete structures that deviate from the standard cylindrical constructions. Typical concrete housings of the invention are a parallelepipedic structure, or an annular structure comprising two concentric walls. Both structures can be covered by a gabled or an arched roof, and avoid the size limitations imposed on cylindrical structures as a result of the size limitations inherent to concrete domes. The invention proposes also several ways to improve the available working height of LNG within such concrete structures of a given height.
Abstract:
Disclosed is a method for the removal of ammonia from the off-gas of a finishing section of a urea production plant. The method comprises contacting the off-gas with a solid adsorbent capable of physically adsorbing ammonia, particularly activated carbon or zeolite. Thereupon the solid adsorbent having ammonia adsorbed thereon is separated from the gas and regenerated by dissolving ammonia in an extraction liquid, preferably water. After separating the water from the solid adsorbent, the latter is re-used in the process.