摘要:
Provided is a composition for removing a sulfur-containing compound contained in at least one of a liquid and gas, the sulfur-containing compound being at least one selected from the group consisting of hydrogen sulfide and an —SH group-containing compound, the composition containing an aldehyde and an amine whose conjugate acid has a pKa value of 11.3 or higher in water at 25° C.
摘要:
The invention relates to an absorbent solution comprising water and at least one amine belonging to the N-alkyl-hydroxypiperidine family and to a method implementing this solution for removing acid compounds contained in a gaseous effluent.
摘要:
The present invention relates to processes for hydromethanating a carbonaceous feedstock to a hot methane-enriched synthesis gas, in which heat energy from the hot methane-enriched synthesis gas is used to generate a dry saturated steam stream, and 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.
摘要:
A process for producing a deacidified fluid stream from a fluid stream comprising methanol and at least one acid gas, comprising
a) an absorption step in which the fluid stream is contacted with an absorbent in an absorber to obtain an absorbent laden with methanol and acid gases and an least partly deacidified fluid stream; b) a regeneration step in which at least a portion of the laden absorbent obtained from step a) is regenerated in a regenerator to obtain an at least partly regenerated absorbent and a gaseous stream comprising methanol and at least one acid gas; c) a recycling step in which at least a substream of the regenerated absorbent from step b) is recycled into the absorption step a); d) a condensation step in which a condensate comprising methanol is condensed out of the gaseous stream from step b);
wherein the regenerator additionally comprises a rescrubbing section, and the condensate from step d) is recycled into the regenerator partly in the upper region of the rescrubbing zone or above the rescrubbing zone.
摘要:
The invention concerns a purification method comprising: providing a flow comprising a glycol, monovalent ions and multivalent ions; treating this flow with ion exclusion chromatography comprising: injecting the flow into a chromatographic unit comprising an ion exchange stationary phase; injecting an eluent into the chromatographic unit; collecting a fraction at the outlet of the chromatographic unit; the collected fraction being enriched with glycol and depleted of monovalent ions and multivalent ions relative to the flow. The invention also concerns an installation adapted to implement this method, and its application to the regeneration of an anti-hydrate agent.
摘要:
A system includes a radiant syngas cooler (RSC). The RSC includes cooling tubing configured to transmit a fluid. The RSC is configured to have a heat transfer area such that the RSC generates a pressure and a temperature of the fluid exiting the RSC to a level allowing for superheating of the fluid to between approximately 750° Fahrenheit and approximately 850° Fahrenheit. Additionally, the heat transfer area is determined based on an amount of heat to be transferred to the fluid as the fluid passes through a heat exchanger in a first path external to the RSC.
摘要:
The invention relates to an integrated process for the production of 5-hydroxymethyl furfural (HMF), K2SO4, levulinic acid and formic acid from κ-carrageenan, the latter being obtained from fresh Kappaphycus alvarezii seaweed biomass after expelling the juice. Mg(HSO4)2 was used in HMF synthesis, with co-production of galactose. The aqueous stream after HMF extraction was treated with the seaweed juice which process facilitated recovery of K2SO4 in pure form. The galactose may be utilised for synthesis of levulinic acid and formic acid before or after K2SO4 recovery or, alternatively, utilised for other purposes. Catalysts required in the synthetic reactions are generated in the process itself while the process energy required is met out of additional supplies of the seaweed biomass which is subjected to combustion/gasification.
摘要翻译:本发明涉及一种从κ-角叉菜胶生产5-羟甲基糠醛(HMF),K 2 SO 4,乙酰丙酸和甲酸的综合方法,后者是在榨出果汁后从新鲜的Kappaphycal alvarezii海藻生物量获得的。 Mg(HSO4)2用于HMF合成,共同生产半乳糖。 HMF萃取后的水流用海藻汁处理,该方法便于纯化形式回收K 2 SO 4。 K2SO4回收前后,半乳糖可用于合成乙酰丙酸和甲酸,或者用于其他目的。 在合成反应中需要的催化剂在工艺本身中产生,而所需的工艺能量通过进行燃烧/气化的海藻生物质的额外供应来满足。
摘要:
Methods and systems for the biological conversion of pretreated or solubilized coal or waste coal into biofuels. Coal (10) may be pretreated perhaps in a pretreatment reactor (13). Pretreated coal or even solubilized coal may be introduced into a processing reactor such as a bioreactor (16) containing a plurality of microorganisms (9) such as oleaginous microorganisms which can convert at least some of the pretreated or solubilized coal into lipids (19) or biomass (18), which then may be used directly or as a precursor for various products such as biofuels, feedstock, or the like.
摘要:
The instant invention describes a method and system for producing biodiesel which increases energy efficiency by reducing the overall amount of energy associated with producing the biodiesel. Unlike most systems which use a batch procedure, the instant method and system utilize a continuous flow sonification procedure which provides for reactions to take place in tubes as the biodiesel moves along through the process. The continuous flow sonification procedure is performed in two main stages, utilizing the steps of acid esterification, transesterification, and a waterless washing.
摘要:
A process for producing a deacidified fluid stream from a fluid stream comprising methanol and at least one acid gas and an apparatus for carrying out the process. The process comprising a) an absorption step in which the fluid stream is contacted with an absorbent in an absorber to obtain an absorbent laden with methanol and acid gases and an least partly deacidified fluid stream; b) a regeneration step in which at least a portion of the laden absorbent obtained from step a) is regenerated in a regenerator to obtain an at least partly regenerated absorbent and a gaseous stream comprising methanol, water and at least one acid gas; c) a recycling step in which at least a substream of the regenerated absorbent from step b) is recycled into the absorption step a); d) a condensation step in which a condensate comprising methanol and water is condensed out of the gaseous stream from step b); e) a distillation step in which at least a portion of the condensate from step d) is guided into a distillation column to obtain a top stream comprising methanol and a bottom stream comprising water; which comprises recycling at least a portion of the bottom stream from step e) into the regenerator.