公开(公告)号：US4792441A

公开(公告)日：1988-12-20

申请号：US145782

申请日：1988-01-19

Applicant: Shoou-I Wang ,  Nitin M. Patel ,  Shivaji Sircar ,  Rodney J. Allam

Inventor： Shoou-I Wang ,  Nitin M. Patel ,  Shivaji Sircar ,  Rodney J. Allam

IPC: C01B3/02 ,  C01C1/04

CPC classification number: C01B3/025

Abstract: An ammonia synthesis gas mixture comprised of substantially pure hydrogen and nitrogen in approximately 3/1 molar ratio is obtained form two stage reforming of a methane-rich hydrocarbon charge such as natural gas. About 40% of the fresh natural gas is charged to primary steam reforming and the obtained primary reformate product, containing about 17 volume percent of unreacted methane, is mixed with the other 60% of the fresh natural gas and the mixture is subjected to oxidative reforming with enriched air containing 30 to 35 of O.sub.2, said enriched air being supplied in an amount to produce a secondary reformate containing principally hydrogen and nitrogen, accompanied by a minor amount of oxides of carbon (CO and CO.sub.2). The secondary reformate subjected to shift reaction with steam results in conversion of contained CO to CO.sub.2, thereby releasing hydrogen in an amount which together with the hydrogen previously present in said reformate obtains a H.sub.2 /N.sub.2 molar ratio of about 3/1. Carbon dioxide is removed and recovered from the shift reaction product by pressure swing adsorption in a first adsorbent bed. The other contaminants remaining are largely removed by further adsorption in second adsorbent bed in flow-communication with the first bed, the unadsorbed effluent being a syngas mixture consisting essentially of hydrogen and nitrogen in stoichiometric ratio for production of NH.sub.3.

Abstract translation: 由大量为3/1摩尔比的基本上纯的氢气和氮气组成的氨合成气混合物是由天然气等富含甲烷的碳氢化合物装置的两级重整得到的。 将约40％的新鲜天然气装入一次蒸汽重整，将得到的含有约17体积％未反应甲烷的初级重整产物与另外60％的新鲜天然气混合，并将混合物进行氧化重整 含有30至35个O 2的富集空气，所述富集空气的供应量以生产主要为氢和氮的二次重整产物，伴随着少量的碳氧化物（CO和CO 2）。 与蒸汽进行转化反应的二次重整产物导致所含CO转化为CO 2，从而释放氢，其量与先前存在于所述重整产物中的氢一起获得约3/1的H 2 / N 2摩尔比。 通过第一吸附床中的变压吸附除去二氧化碳并从变换反应产物中回收。 残留的其他污染物通过在与第一床流动连通的第二吸附剂床中进一步吸附大部分被除去，未吸附的流出物是基本上由氢和氮组成的合成气混合物，其化学计量比用于生产NH 3。

公开(公告)号：US4461154A

公开(公告)日：1984-07-24

申请号：US388375

申请日：1982-06-14

Applicant: Rodney J. Allam

Inventor： Rodney J. Allam

IPC: F22B1/16 ,  C01C1/04 ,  C07C1/00 ,  C07C1/04 ,  C07C11/04 ,  C07C27/00 ,  C07C29/15 ,  C07C29/151 ,  C07C31/04 ,  C07C67/00 ,  C07C239/00 ,  C07C273/02 ,  F01D15/08 ,  F01K27/02 ,  F04D25/02 ,  F25J1/00 ,  F25B9/00

CPC classification number: F25J3/04121 ,  F01K27/02 ,  F04D25/024 ,  F25J3/04018 ,  F25J3/04618 ,  F25J2230/04 ,  F25J2230/06 ,  F25J2240/70 ,  F25J2290/02

Abstract: The fuel required to provide the energy for compressing a gas can be reduced by compressing the gas substantially adiabatically through a pressure ratio of at least 2.5:1 in a compressor, cooling the hot compressed gas by heat exchange with water at superatmospheric pressure, further heating the water to produce super-heated steam and using the superheated steam to drive the compressor. The total amount of fuel consumed can be considerably less than that used for compressing gas conventionally (i.e. substantially isothermally).

Abstract translation: 为提供压缩气体所需的能量所需的燃料可以通过在压缩机中压缩气体基本绝热至少2.5:1的压力来降低，通过在超大气压下与水进行热交换来冷却热压缩气体，进一步加热 水产生超热蒸汽并使用过热蒸汽驱动压缩机。 所消耗的燃料的总量可以显着小于用于常规压缩气体（即基本上等温）的燃料。