Catalytic rich gas process

Description Gas feedstock is compressed (if required), desulfurized (1) and sent to the optional saturator (2) where some process steam is generated. The saturator is used where maximum water recovery is important. Further process steam is added, and the mixture is preheated and sent to the pre-reformer (3), using the Catalytic-Rich-Gas process. Steam raised in the methanol converter is added, along with available C02, and the partially reformed mixture is preheated and sent to the reformer (4). High-grade heat in the reformed gas is recovered as high-pressure steam (5), boiler feedwater preheat, and for reboil heat in the distillation system (6). The high-pressure steam is used to drive the main compressors in the plant. 

CRG process (catalytic rich gas process) A catalytic process used to produce fuel gas ftom naphtha, which is a light petroleum distillate. The naphtha is reacted with steam over a nickel-based catalyst at a temperamre of up to 650 C and pressure of 70 bar to produce a gas mixmre that is rich in me ane. Other gases in the product include carbon dioxide, carbon monoxide, and trace amounts of hydrocarbons. The process was superseded in the UKbythe discovery of North Sea gas. 

CRG [Catalytic Rich Gas] A process for making town gas and rich gas from light petroleum distillate (naphtha). The naphtha is reacted with steam over a nickel-alumina catalyst yielding a gas mixture rich in methane. Developed by British Gas and used in the United Kingdom in the 1960s, but abandoned there after the discovery of North Sea gas. In 1977,13 plants were operating in the United States. 

Recatro A process for making gas from liquid fuels and other gaseous hydrocarbons by catalytic conversion into rich gas, followed by catalytic steam reforming. Developed by BASF and Lurgi. 

If there is an existing Claus process nearby, the SO2 rich gas could be combined with the H2S feed. If the ratio of H2S to SO2 is about 2 1, a minor adjustment could be made and the gas sent to the catalytic reactor. 

Deep Catalytic Cracking. This process is a variation of fluid catalytic cracking. It uses heavy petroleum fractions, such as heavy vacuum gas oil, to produce propylene- and butylene-rich gaseous products and an aromatic-rich liquid product. The liquid product contains predominandy benzene, toluene, and xylene (see BTX processing). This process is being developed by SINOPEC in China (42,73). SINOPEC is currendy converting one of its fluid catalytic units into a demonstration unit with a capacity of 60,000 t/yr of vacuum gas oil feedstock. 

A wide variety of process options can be used with the H-Oil process depending on the specific operation. In all cases, a catalytic ebullated-bed reactor system is used to provide an efficient hydroconversion. The system insures uniform distribution of liquid, hydrogen-rich gas, and catalyst across the reactor. The ebullated-bed system operates under essentially isothermal conditions, exhibiting... 

In the catalytic reforming process, the feed is pumped to operating pressure and mixed with a hydrogen-rich gas before heating to reaction temperatures. The net hydrogen produced is a by-product of the dehydrogenation and cyclization reactions. Several reactions occur ... 

In this section, the selective catalytic reduction of NOx with NH3 is emphasized. This reaction is the basis of the selective catalytic reduction (SCR) process that removes NOx from oxygen-rich emissions that occur in power plants, waste incinerators, and gas turbines. 

---