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Hydromethanation of a carbonaceous feedstock

A technology for hydromethanation and carbonaceous materials, which is applied in the fuel, gas fuel, petroleum industry, etc., to achieve the effect of reducing cost and operation intensity

Inactive Publication Date: 2014-06-25
GREATPOINT ENERGY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, generating the desired amount and type (temperature / pressure) of superheated steam from process heat recovery alone is challenging, especially at or near the operating temperature of the hydromethanation reactor

Method used

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  • Hydromethanation of a carbonaceous feedstock
  • Hydromethanation of a carbonaceous feedstock

Examples

Experimental program
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preparation example Construction

[0240] Preparation of Carbonaceous Feedstock

[0241] Carbonaceous raw material processing (100)

[0242] Particulate carbonaceous materials (e.g., biomass and non-biomass) can be prepared by crushing and / or grinding (alone or together) according to any method known in the art, such as impact crushing and wet or dry grinding to produce one or A variety of carbonaceous particles. Depending on the method used to pulverize and / or grind the carbonaceous material source, the resulting carbonaceous particles can be sieved (i.e., separated by size) to provide the carbonaceous feedstock (32) for the catalyst loading process (350). ) to form a catalyzed carbonaceous feedstock (31+32) for a hydromethanation reactor (200).

[0243] Any method known to those skilled in the art can be used to sieve the particles. Sieving is performed, for example, by sieving or passing the particles through one or more screens. Screening equipment can include grid screens, bar screens, wire mesh screen...

example

[0302] A specific embodiment of the method is such that the second pressure condition is at least about 25 psi (about 172 kPa) higher than the first pressure condition, or at least 50 psi (about 345 kPa), or at least about 100 psi (about 690 kPa), and / or about 200psi (about 1379kPa) or less.

[0303] Another embodiment is such that the pressure of the first process vapor stream (40) is at least about 5% or more higher than the operating pressure (first pressure condition) of the hydromethanation reactor (200), or at least about 10% or greater. In another specific embodiment, the pressure (second pressure condition) of the first process vapor stream (40) at the outlet of the first heat exchanger unit (400) is greater than the operating pressure of the hydromethanation reactor (200) (first pressure condition) is at least about 20% higher or less.

[0304] Another specific embodiment is such that wherein the first pressure condition is about 400 psig (about 2860 kPa) or greater...

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Abstract

The present invention relates to processes for hydromethanating a carbonaceous feedstock to a methane product stream and electrical power, in which heat energy from the hot methane-enriched synthesis gas is used to generate a dry saturated steam stream, the dry saturated steam stream is converted into a superheated steam stream via pressure drop for feeding into the hydromethanation reactor to satisfy the steam demand of the hydromethanation reaction, and heat generated from a downstream gas methanation processing is recovered to produce a superheated process steam stream which is used to generate the electric power.

Description

technical field [0001] The present invention relates to a process for hydromethanating carbonaceous feedstock to a methane product stream and electrical energy, wherein thermal energy from hot methane-enriched synthesis gas is used to generate dry A saturated steam stream (dry saturated steam stream), and the dry saturated steam stream is converted into a superheated steam stream by pressure drop to feed the hydromethanation reactor to meet the steam demand of the hydromethanation reaction, and recover the produced Heat from the downstream gas methanation process to produce a superheated vapor stream for power generation. Background of the invention [0002] Manufacturing value-added products (e.g., pipeline-grade alternative natural gas, hydrogen , Methanol, Higher Hydrocarbons, Ammonia and Electricity) are receiving double attention. [0003] This lower fuel value carbonaceous feedstock can be gasified at high temperature and pressure to produce a syngas stream that can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08
CPCC10L3/08
Inventor A.赛德施潘德
Owner GREATPOINT ENERGY INC