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Process for conversion of sulfur trioxide and hydrogen production

A sulfur trioxide and sulfur dioxide technology, applied in chemical instruments and methods, hydrogen/synthesis gas production, oxygen/ozone/oxide/hydroxide, etc., can solve problems such as low production and high operating costs

Pending Publication Date: 2019-04-02
INDIAN INST OF TECH DELHI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these catalysts operate at lower flow rates (W / F about 5.6×10- 5 g-h / cm 3 ), resulting in lower yields and higher operating costs

Method used

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  • Process for conversion of sulfur trioxide and hydrogen production
  • Process for conversion of sulfur trioxide and hydrogen production
  • Process for conversion of sulfur trioxide and hydrogen production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Pretreatment of Catalyst Supports

[0083] The catalyst support is obtained by using a synthetic method called Pretreatment Method (PTM). Silicon carbide (β-SiC) extrusions (diameter 2 mm) were supplied by SICAT Sarl (France) and are hereafter referred to as β-SiC(R) or β-SiC. Etch β-SiC(R) samples with a 1:1 HF solution in water under ultrasound for 3 min to 5 min at room temperature to remove S from the surface of β-SiC i o x C y / S i o z . The samples were filtered and washed with plenty of deionized water until the filtrate pH reached 6.5 to 7, then the samples were dried under vacuum at 120 °C for 3 hours to 5 hours, hereafter referred to as β-SiC(P) or simply free of β-SiC of silicon dioxide. The dried sample (β-SiC(P)) was subsequently oxidized in atmospheric air at between 700°C and 1000°C for a period of 2 hours to 6 hours to obtain pretreated β-SiC or simply β- SiC(PT).

[0084] Example 1(b)

[0085] Catalyst Fe 2 o 3 / Preparation of β-SiC(R) (for...

Embodiment 2

[0094] Catalyst Cu 2 Preparation of O / β-SiC(R) (for comparison)

[0095] 1.8741g copper precursor (Cu(NO 3 ) 2 .3H 2 O) Dissolved in 10 ml of distilled water, then added 10 g of pre-dried and degassed 2 mm size β-SiC(R) extrudates. Then, the resulting mixture was sonicated for about 30 minutes, so that all β-SiC(R) was fully immersed in the solution. After half an hour, β-SiC(R) was separated from the solution and dried at 80° C. for 30 minutes, then added again to the remaining solution, so that the entire copper solution was absorbed by β-SiC(R). Finally, the impregnated substrates were air dried at 100 °C for 1 h and then calcined at 500 °C for 2 h. The final catalyst is 5% Cu supported on β-SiC(R) 2 O. 2% to 15% (w / w) supported copper(I) oxide catalysts were also prepared by a similar method.

[0096] Example 2(b)

[0097] Catalyst Cu 2 Preparation of O / β-SiC(PT) (for comparison)

[0098] 5% Cu was prepared using the same protocol as used in Example 1(b) 2 O / β-...

Embodiment 3

[0100] Catalyst Cr 2 o 3 / Preparation of β-SiC(R) (for comparison)

[0101] 1.101g ammonium chromate (Cu(NO 3 ) 2 .3H 2 O) Dissolved in 10 ml of distilled water, then added 10 g of pre-dried and degassed 2 mm size β-SiC(R) extrudates. Then, the resulting mixture was sonicated for about 30 minutes, so that all β-SiC(R) was fully immersed in the solution. After half an hour, β-SiC(R) was separated from the solution and dried at 80° C. for 30 minutes, then added again to the remaining solution, so that the entire ammonium chromate solution was absorbed by β-SiC(R). Finally, the impregnated substrates were air dried at 100 °C for 1 h and then calcined at 500 °C for 2 h. The final catalyst is 5% Cr supported on β-SiC(R) 2 o 3 . 2% to 15% (w / w) supported chromium(III) oxide catalysts on β-SiC(R) supports were also prepared by a similar method.

[0102] Example 3(b)

[0103] Catalyst Cr 2 o 3 / Preparation of β-SiC(PT) (for comparison)

[0104] 5% Cr was prepared using...

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PUM

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Abstract

The present disclosure relates to a process for decomposition of sulfuric acid, particularly a process for catalytically decomposing sulfuric acid, to obtain sulfur dioxide therefrom. In the present process, catalysts play a major role for improving the dissociation efficiency by lowering the activation energy barrier for the reaction.

Description

technical field [0001] The subject matter described herein generally relates to methods for converting sulfur trioxide to sulfur dioxide and oxygen in the presence of catalyst compositions. Background technique [0002] The world's energy demand is constantly increasing, and due to the widespread use of carbon-containing energy, atmospheric emissions of greenhouse gases are increasing rapidly, resulting in various global environmental problems. In order to alleviate these problems, many research programs have been carried out worldwide for the development of renewable energy sources, such as technologies for harnessing solar energy, wind energy, tidal energy, nuclear energy or geological energy. This has led to the introduction of a new universal energy carrier, namely hydrogen [1, 2]. Splitting water directly into hydrogen and oxygen is impractical and energy-intensive. This can be achieved in a number of ways to reduce energy requirements and by generating hydrogen and o...

Claims

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Application Information

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IPC IPC(8): C01B17/00
CPCC01B3/042C01B13/0207C01B17/502B01J23/26B01J23/42B01J23/72B01J23/745B01J23/75B01J23/755B01J23/80B01J23/866B01J27/1853B01J27/228B01J23/005Y02E60/36B01J23/868B01J27/224C01B17/745B01J35/612B01J35/613B01J21/04B01J23/002B01J23/862C01B17/503C01B2203/0277C01B2203/06C01B2203/1628B01J35/40B01J35/51B01J35/633B01J35/635
Inventor 斯里德维·乌帕德亚尤拉阿肖克·尼里蒂·巴斯卡尔瓦尔基肖尔·孔达穆迪帕尔瓦塔卢·达马拉尤巴拉特·巴尔加瓦萨蒂纳特·班纳吉
Owner INDIAN INST OF TECH DELHI
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