Abstract:
Processes and catalysts for the hydrogenation of carbon dioxide to produce an oxo-synthesis syngas containing composition are disclosed. The process includes contacting a chromium oxide/alumina supported catalyst with hydrogen (H 2 ) and CO 2 at a constant temperature or temperature range and high pressure (at least 0.5 MPa) to produce the oxo-synthesis syngas containing composition having a H 2 :CO molar ratio of 1.2 or less and methane (CH 4 ) in an amount of at least 1 molar %.
Abstract:
Processes and catalysts for the hydrogenation of carbon dioxide reaction are disclosed. A process for hydrogenation of carbon dioxide (CO 2 ) to produce a syngas containing composition that includes hydrogen (H 2 ) and carbon monoxide (CO) can include contacting a chromium oxide supported catalyst with H 2 and CO 2 at a temperature of at least 600 °C and a pressure greater than atmospheric pressure to produce the syngas containing composition.
Abstract:
Methods for producing olefins by an oxidative dehydrogenation reaction are provided. Methods can include introducing C 2 and C 3 hydrocarbons, such as ethane and propane, to a Cr oxide catalyst in the presence of CO 2 to generate olefins, such as ethylene and propylene, and syngas. The Cr oxide catalyst can be modified with K and Mn.
Abstract:
Methods of preparing syngas are provided. Blend gas obtained from methane steam reforming can be reacted with CO2 in the presence of a spent catalyst to provide syngas with a composition ideal for oxo-synthesis.
Abstract:
본 발명은 산화적 탈수소화 반응용 촉매 및 이의 제조방법에 관한 것으로, 다공성 구조로부터 고온 및 고압의 반응 조건과 부반응에 의한 발열을 용이하게 제어함으로써, 생성물에 대한 선택도가 우수한 산화적 탈수소화 반응용 촉매 및 이의 제조방법을 제공하는 효과가 있다.
Abstract:
본 발명은 탄화수소 탈수소화 반응용 촉매, 그 제조방법 및 상기 촉매를 이용한 탄화수소의 탈수소화를 통한 올레핀의 제조방법에 관한 것으로, 상세하게는 산화크로뮴, 산화칼륨 및 산화세륨이 담지된 알루미나 담체를 포함하고, 알루미나 100 중량부에 대하여 1 내지 30 중량부의 산화크로뮴, 알루미나 100 중량부에 대하여 0.1 내지 10 중량부의 산화칼륨 및 알루미나 100 중량부에 대하여 1 내지 20 중량부의 산화세륨을 포함하는, 탄화수소 탈수소화 반응용 촉매를 제공한다. 본 발명의 탄화수소 탈수소화 반응용 촉매에 있어서, 알루미나 담체는 분무건조법에 의해 쉽게 제조할 수 있으며, 금속 산화물을 담지하는 과정 역시 간단한 공정을 통해 수행된다. 따라서, 알루미나 담체 제조 및 최종적으로 얻어지는 알루미나에 담지된 산화크로뮴-산화칼륨-산화세륨을 포함하는 탄화수소 탈수소화 반응용 촉매의 제조 공정에 있어 우수한 재현성을 확보할 수 있다. 이에 올레핀을 높은 수율로 제조할 수 있는 탄화수소 탈수소화 반응용 촉매를 안정적으로 얻을 수 있다. 또한 일례로, 나프타 분해공정을 신설하지 않고도 프로필렌을 지속적으로 제조할 수 있는 단독 생산 공정을 확보하여, 증가하는 프로필렌 수요를 충족시킴으로써 경제적 이득을 얻을 수 있으며, 향후 시장 변화에 능동적으로 대처할 수 있다는 장점이 있다.
Abstract:
An integrated process, suitable for use in a new or retrofitted plant, produces an olefin or di-olefin via the dehydrogenation of an appropriate C3-C4 hydrocarbon feed includes (1) contacting the feed and a dehydrogenation catalyst having a Geldart A or Geldart B classification in a fluidized bed at a temperature from 550 °C to 760 °C and a pressure from about 41.4 to about 308.2 kPa (about 6.0 to about 44.7 psia) and a catalyst to feed ratio, w/w, from 5 to 100 to form a dehydrogenate product; separating the dehydrogenate product and unreacted starting feed mixture from a portion of the catalyst by means of a cyclonic separation system; reactivating the catalyst in a fluidized regenerator by combustion at 660 °C to 850 °C, followed by contact with an oxygen-containing fluid at 660 °C or greater, and returning the catalyst to the dehydrogenation reactor; (2) compressing the product mixture to form a compressed product mixture; and (3) fractionating the compressed product mixture to form a product stream including at least the target olefin or di-olefin. The integrated process offers increased plant capacity, improved economics, and reduced environmental impact in comparison with other known and conventional processes.
Abstract:
The invention contributes to a cost effective way to solve the problem of trace ammonia removal from a hydrogen and nitrogen containing gas. The set of catalysts of the invention selectively oxidised ammonia in ppm concentration even in gas mixtures containing hydrogen gas in concentrations of three orders of magnitude higher than the concentration of ammonia.
Abstract:
A process of catalytically dehydrogenating an alkane to an alkene, using Cr 2 O 3 as a catalyst, where the catalyst is reduced concurrently with the dehydrogenation by using CO as a reducing gas. In reducing the catalyst with CO, CO 2 is produced, which may be reacted with H 2 produced by the dehydrogenation, to form CO and H 2 O by the reverse water-gas shift reaction. A Cu O heat-releasing material may be included with the catalyst in the reactor. The CO reducing gas reduces CuO to form Cu and CO 2 , releasing heat. The CO 2 produced by reducing the Cu O may also be reacted with H 2 produced by the dehydrogenation, to form CO and H 2 O by the reverse water-gas shift reaction.
Abstract translation:使用Cr 2 O 3作为催化剂将烷烃催化脱氢至烯烃的方法,其中通过使用CO作为还原气体,催化剂与脱氢同时还原。 在用CO还原催化剂时,产生CO 2,其可与通过脱氢产生的H 2反应,通过反向水煤气变换反应形成CO和H 2 O. 在反应器中可以包括催化剂中的Cu O放热材料。 CO还原气体还原CuO以形成Cu和CO 2,释放热量。 通过还原CuO生成的CO 2也可以与通过脱氢产生的H 2反应,通过反向水煤气变换反应形成CO和H 2 O.