公开(公告)号：US3922148A

公开(公告)日：1975-11-25

申请号：US47070174

申请日：1974-05-16

Applicant: TEXACO DEVELOPMENT CORP

Inventor： CHILD EDWARD T

IPC: C07B61/00 ,  C01B3/22 ,  C01B3/36 ,  C07C1/00 ,  C07C1/02 ,  C07C1/04 ,  C07C7/00 ,  C07C9/04 ,  C07C67/00 ,  C10G9/38 ,  C10J3/46 ,  C10L3/00 ,  C10J3/06

CPC classification number: C10L3/00 ,  C01B3/22 ,  C01B3/36 ,  C07C1/0485 ,  C07C7/00 ,  C07C9/04 ,  C07C2521/04 ,  C07C2523/755 ,  Y02A50/2327

Abstract: This is an improved continuous process for producing a clean methane-rich gas stream without the concomitant formation of particulate carbon which would ordinarily decrease the efficiency of the process and shorten the life of the catalyst. By-product superheated steam is simultaneously produced at a maximum temperature. The product stream may have a methane content up to 98 to 99 mole % or higher and a gross heating value up to 1000 BTU per SCF or more. Process steps include partial oxidation of a hydrocarbonaceous fuel under operating conditions that produce a synthesis gas containing 10 to 30 mole % methane (dry and CO2free basis) and a H2/CO mole ratio of 2.6 or higher, and reacting the methane-rich process gas stream in one to three catalytic methanation stages under critical operating conditions that increase the methane content in the process gas stream stepwise up to 98 mole % or higher without incipient soot formation for each corresponding CH4 content of the feed as one proceeds from one methanation step to another. Heat from the highly exothermic methanation reaction is used to make valuable by-product superheated steam. The product gas may be burned without polluting the atmosphere.

Abstract translation: 这是一种用于生产清洁的富甲烷气流而不伴随形成颗粒碳的改进的连续方法，这通常会降低该方法的效率并缩短催化剂的使用寿命。 在最高温度下同时生产副产物过热蒸汽。 产物流可以具有高达98至99摩尔％或更高的甲烷含量和高达1000BTU / SCF或更高的总热值。 工艺步骤包括在产生含有10至30摩尔％甲烷（基于干和无CO2的基础）和H2 / CO摩尔比为2.6或更高的合成气的操作条件下的烃类燃料的部分氧化，以及使富甲烷 在一至三个催化甲烷化阶段的过程气流在临界操作条件下，其逐步增加工艺气体流中甲烷含量高达98％（摩尔）或更高，而不会因为一种甲烷化进行的每种相应CH4含量的烟灰形成 一步到另一个 来自高放热甲烷化反应的热量用于制造有价值的副产物过热蒸汽。 产品气体可能在不污染大气的情况下燃烧。