An exhaust system for a steam reformer comprises at least one longitudinal collecting tube, wherein along the longitudinal axis of the longitudinal collecting tube ports for connection to catalyst tubes are provided, which in the connected condition are aligned parallel to each other and vertically to the longitudinal collecting tube, a transverse collector which is connected to the at least one longitudinal collecting tube and has a longitudinal axis which extends vertically to the at least one longitudinal collecting tube and vertically to the catalyst tubes, wherein the longitudinal collecting tube is formed as hot exhaust system and the transverse collector is formed as cold exhaust system. The transverse collector is arranged on a side of the longitudinal collecting tube facing away from the ports centrally to the longitudinal collecting tube.

Disclosed is an integrated process and system to generate power and convert acyclic C5 feedstock to non-aromatic, cyclic C5 hydrocarbon. A combustion device, such as a turbine, and reactor tubes containing catalyst compound are disclosed. A process involving contacting acyclic C5 feedstock with catalyst composition and obtaining cyclic C5 hydrocarbon is also disclosed.

Disclosed is a process and system to convert acyclic C.sub.5 feedstock to non-aromatic, cyclic C.sub.5 hydrocarbon. A furnace and reactor tubes comprising a catalyst compound are disclosed. A process involving contacting acyclic C.sub.5 feedstock with catalyst composition and obtaining cyclic C.sub.5 hydrocarbon is also disclosed.

The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA), comprising a plurality of catalyst zones arranged in succession in the reaction tube, which has been produced using antimony trioxide consisting predominantly of the senarmontite modification of which all primary crystallites have a size of less than 200 nm. The present invention further relates to a process for gas phase oxidation, in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system which comprises a plurality of catalyst zones arranged in succession in the reaction tube and which has been produced using an antimony trioxide consisting predominantly of the senarmontite modification with a median primary crystallite size of less than 200 nm.

An article including a metal substrate, an anti-coking catalyst layer and an alumina barrier layer disposed between the metal substrate and the anti-coking catalyst layer is provided. A process for making the article is also provided.

A one-to-many parallelized millireactor system capable of high throughput production in millireactors. Also disclosed is a method for carrying out multi-phase reactions.

Process and plant for the synthesis of ammonia from a hydrocarbon feedstock, comprising: primary reforming with steam and air-fired secondary reforming wherein primary reforming is performed at a temperature and pressure of at least 790 C. and 50 bar, and secondary reforming is carried out substantially in absence of excess air, the so obtained make-up synthesis gas having a H.sub.2 to N.sub.2 molar ratio in the range 2.5 to 3.

A method for a selecting a loading pressure drop tolerance specification for a plurality of tubes in a multitubular fixed-bed reactor, wherein the plurality of tubes comprise a packed bed of epoxidation catalyst, the method comprising: defining a first loading pressure drop tolerance range for the plurality of tubes based on a desired maximum variation in outlet oxygen concentration, relative to the mean, for the plurality of tubes; defining a second loading pressure drop tolerance range for the plurality of tubes based on a desired maximum number of tube corrections for the plurality of tubes; and selecting the loading pressure drop tolerance specification for the plurality of tubes such that the entirety of the loading pressure drop tolerance specification falls within the first loading pressure drop tolerance range and the second loading pressure drop tolerance range.

The invention relates to a boiling water reactor for an exothermal reaction. The reactor comprises reactant by-pass inserts arranged on top of the upper tube sheet to provide for a catalyst layer on top of the upper tube sheet and also a cooling stream of reactant by-passing the upper layer of catalyst and cooling the upper tube sheet from the temperature rise due to the exothermal reaction taking place in the upper layer of catalyst.

An exhaust system for a steam reformer comprises at least one longitudinal collecting tube, wherein along the longitudinal axis of the longitudinal collecting tube ports for connection to catalyst tubes are provided, which in the connected condition are aligned parallel to each other and vertically to the longitudinal collecting tube, a transverse collector which is connected to the at least one longitudinal collecting tube and has a longitudinal axis which extends vertically to the at least one longitudinal collecting tube and vertically to the catalyst tubes, wherein the longitudinal collecting tube is formed as hot exhaust system and the transverse collector is formed as cold exhaust system. The transverse collector is arranged on a side of the longitudinal collecting tube facing away from the ports centrally to the longitudinal collecting tube.